http://wikis.swarthmore.edu/telescope/api.php?action=feedcontributions&feedformat=atom&user=Dcohen1 2026-11-07T22:19:31Z User contributions MediaWiki 1.44.3 http://wikis.swarthmore.edu/telescope/index.php?title=Problem_reports&diff=423 2013-04-03T00:32:02Z

<p>Dcohen1: </p> <hr /> <div>1 Feb 2013: Six good hours of observing with a chain of ACP scripts, last script ended about 1:30 AM (darks and biases), scope pointing to the west and low. Scope doesn't home automatically (should it?) so I home it via The Sky and the software reports slewing but it never reports reaching home. I go to the observatory, physically, and find the scope's RA alarm on and the scope pointing west still. The Sky seems to have lost contact with the scope.<br /> <br /> 9 Feb 2013: Ran a YETI 2x2 mosaic field. Then separately started up darks plan then an autoguided KELT field chained to a dawn flats + bias plan. In the morning, the science data were taken, but the dawn flats and biases weren't. Telescope low and west, RA alarm going off, The Sky hung (dialog box showing slewing was going). <br /> <br /> 14 Feb 2013: Had some strange guiding problems (star looked strong, pointing kept drifting away). Turned out (the next day) that the guide settings had been messed with somehow - the manual calibration speeds and angle were off, quite off in the case of x. The next evening we did a calibration and it worked and those values were reset to something reasonable. <br /> <br /> 17 Feb 2013: Smooth start up of script (R band transit with autoguiding); manually aborted the ACP plan simply to change the exposure time, but when we started the plan back up, MaximDL hung. We had to restart all the hardware (just restarting MaximDL wasn't enough - camera connection couldn't be made), and then reconnect the software (didn't restart the computer, just the scope and camera, and made sure the dome was homed). <br /> <br /> The plan started up fine. But a few minutes into it, guiding started acting funny again (much like 14 Feb) but the settings look OK. <br /> <br /> 18 Feb 2013: switching plans at 11pm, autoguiding problems upon starting the second plan (after Eric saw similar problems related to 1x1 binning, but then he got it working by bypassing ACP). Image is 1x1, and after just taking the first full-frame guide camera image, it doesn't really seem to be trying to start autoguiding. <br /> <br /> After watching it take unguided images, continually failing to start autoguiding, for 20 minutes, I aborted the script (which MaximDL was not exposing an image, but rather while it was plate-solving the just-downloaded image. Then I simply took a guide camera image with MaximDL (it was 2x2 and looked good), started guiding, and it ran fine. After a couple of minutes, I started the Kelt target plan, and it started up fine, took the pointing image, the first target image, guiding kept running seamlessly. ACP console reported &quot;guider check OK.&quot; Few minutes later and everything's still going fine. A few hours later and everything's going fine. <br /> <br /> 21 Feb 2013: Problems with guiding, similar to some of the stuff we've seen the last few weeks. Plan started up, autoguiding started up just fine (from within the plan). Images (both science and guide) looked fine. But after a few minutes, the guide errors got bigger and systematic -- always in one direction. ACP stopped guiding because of the big errors. I aborted the plan. Took a guide image directly with MaximDL and started guiding from MaximDL. Once I verified it was going well, I started the plan anew, but MaximDL crashed after taking the first image. Homed and shut down the hardware. Closed all software. Started hardware and software back up. Started up the plan (without getting guiding going separately in MaximDL), and everything seemed to work fine. It's 20 minutes later and everything, including the guiding, is going smoothly. While the guiding was having its problems, I verified that the guide camera image was 2x2 binned. And it was. <br /> <br /> 24 Feb 2013: YETI 2x2 observing went just fine; there was a brief power outage on campus, but while the Mac in the control room went down, everything in the dome continued to operate normally and observing was never interrupted. After the YETI observing (and dark-taking) ended around midnight, I did some recreational observing till 5pm (automated) and then dawn flats in three filters were taken, without a problem. (The last few weeks, long periods of inactivity seemed to make the system more likely to fail when ACP finally issued pointing commands to the telescope via the Sky; that didn't happen this time, perhaps because the scope was actively being used for most of that time; and also, therefore, not tracking far to the west.)<br /> <br /> 19 Mar 2013: (after aborting and restarting a plan) autoguiding ran away in one direction, despite having a nice bright star; ACP stopped it eventually, restarted, and it went fine for a few minutes but then started systematically drifting away again. (A few days later: in retrospect, this seems like the guide camera binning problem discussed above (21 Feb 2013); and I note that we had to restart the plan at the beginning of the evening and may not have started clean.) <br /> <br /> 1 Apr 2013: 2nd plan in chain did not complete; bug in ACP appears to have made the target seem unobservable and so observing was skipped and dawn plan initiated. But during the hours the telescope was waiting for dawn, it appears to have kept tracking and hit the RA limit (it was found at this limit when Eric came in in the morning).</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Problem_reports&diff=422 2013-03-20T05:07:54Z

<p>Dcohen1: </p> <hr /> <div>1 Feb 2013: Six good hours of observing with a chain of ACP scripts, last script ended about 1:30 AM (darks and biases), scope pointing to the west and low. Scope doesn't home automatically (should it?) so I home it via The Sky and the software reports slewing but it never reports reaching home. I go to the observatory, physically, and find the scope's RA alarm on and the scope pointing west still. The Sky seems to have lost contact with the scope.<br /> <br /> 9 Feb 2013: Ran a YETI 2x2 mosaic field. Then separately started up darks plan then an autoguided KELT field chained to a dawn flats + bias plan. In the morning, the science data were taken, but the dawn flats and biases weren't. Telescope low and west, RA alarm going off, The Sky hung (dialog box showing slewing was going). <br /> <br /> 14 Feb 2013: Had some strange guiding problems (star looked strong, pointing kept drifting away). Turned out (the next day) that the guide settings had been messed with somehow - the manual calibration speeds and angle were off, quite off in the case of x. The next evening we did a calibration and it worked and those values were reset to something reasonable. <br /> <br /> 17 Feb 2013: Smooth start up of script (R band transit with autoguiding); manually aborted the ACP plan simply to change the exposure time, but when we started the plan back up, MaximDL hung. We had to restart all the hardware (just restarting MaximDL wasn't enough - camera connection couldn't be made), and then reconnect the software (didn't restart the computer, just the scope and camera, and made sure the dome was homed). <br /> <br /> The plan started up fine. But a few minutes into it, guiding started acting funny again (much like 14 Feb) but the settings look OK. <br /> <br /> 18 Feb 2013: switching plans at 11pm, autoguiding problems upon starting the second plan (after Eric saw similar problems related to 1x1 binning, but then he got it working by bypassing ACP). Image is 1x1, and after just taking the first full-frame guide camera image, it doesn't really seem to be trying to start autoguiding. <br /> <br /> After watching it take unguided images, continually failing to start autoguiding, for 20 minutes, I aborted the script (which MaximDL was not exposing an image, but rather while it was plate-solving the just-downloaded image. Then I simply took a guide camera image with MaximDL (it was 2x2 and looked good), started guiding, and it ran fine. After a couple of minutes, I started the Kelt target plan, and it started up fine, took the pointing image, the first target image, guiding kept running seamlessly. ACP console reported &quot;guider check OK.&quot; Few minutes later and everything's still going fine. A few hours later and everything's going fine. <br /> <br /> 21 Feb 2013: Problems with guiding, similar to some of the stuff we've seen the last few weeks. Plan started up, autoguiding started up just fine (from within the plan). Images (both science and guide) looked fine. But after a few minutes, the guide errors got bigger and systematic -- always in one direction. ACP stopped guiding because of the big errors. I aborted the plan. Took a guide image directly with MaximDL and started guiding from MaximDL. Once I verified it was going well, I started the plan anew, but MaximDL crashed after taking the first image. Homed and shut down the hardware. Closed all software. Started hardware and software back up. Started up the plan (without getting guiding going separately in MaximDL), and everything seemed to work fine. It's 20 minutes later and everything, including the guiding, is going smoothly. While the guiding was having its problems, I verified that the guide camera image was 2x2 binned. And it was. <br /> <br /> 24 Feb 2013: YETI 2x2 observing went just fine; there was a brief power outage on campus, but while the Mac in the control room went down, everything in the dome continued to operate normally and observing was never interrupted. After the YETI observing (and dark-taking) ended around midnight, I did some recreational observing till 5pm (automated) and then dawn flats in three filters were taken, without a problem. (The last few weeks, long periods of inactivity seemed to make the system more likely to fail when ACP finally issued pointing commands to the telescope via the Sky; that didn't happen this time, perhaps because the scope was actively being used for most of that time; and also, therefore, not tracking far to the west.)<br /> <br /> 19 Mar 2013: (after aborting and restarting a plan) autoguiding ran away in one direction, despite having a nice bright star; ACP stopped it eventually, restarted, and it went fine for a few minutes but then started systematically drifting away again.</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Problem_reports&diff=421 2013-02-26T02:16:39Z

<p>Dcohen1: </p> <hr /> <div>1 Feb 2013: Six good hours of observing with a chain of ACP scripts, last script ended about 1:30 AM (darks and biases), scope pointing to the west and low. Scope doesn't home automatically (should it?) so I home it via The Sky and the software reports slewing but it never reports reaching home. I go to the observatory, physically, and find the scope's RA alarm on and the scope pointing west still. The Sky seems to have lost contact with the scope.<br /> <br /> 9 Feb 2013: Ran a YETI 2x2 mosaic field. Then separately started up darks plan then an autoguided KELT field chained to a dawn flats + bias plan. In the morning, the science data were taken, but the dawn flats and biases weren't. Telescope low and west, RA alarm going off, The Sky hung (dialog box showing slewing was going). <br /> <br /> 14 Feb 2013: Had some strange guiding problems (star looked strong, pointing kept drifting away). Turned out (the next day) that the guide settings had been messed with somehow - the manual calibration speeds and angle were off, quite off in the case of x. The next evening we did a calibration and it worked and those values were reset to something reasonable. <br /> <br /> 17 Feb 2013: Smooth start up of script (R band transit with autoguiding); manually aborted the ACP plan simply to change the exposure time, but when we started the plan back up, MaximDL hung. We had to restart all the hardware (just restarting MaximDL wasn't enough - camera connection couldn't be made), and then reconnect the software (didn't restart the computer, just the scope and camera, and made sure the dome was homed). <br /> <br /> The plan started up fine. But a few minutes into it, guiding started acting funny again (much like 14 Feb) but the settings look OK. <br /> <br /> 18 Feb 2013: switching plans at 11pm, autoguiding problems upon starting the second plan (after Eric saw similar problems related to 1x1 binning, but then he got it working by bypassing ACP). Image is 1x1, and after just taking the first full-frame guide camera image, it doesn't really seem to be trying to start autoguiding. <br /> <br /> After watching it take unguided images, continually failing to start autoguiding, for 20 minutes, I aborted the script (which MaximDL was not exposing an image, but rather while it was plate-solving the just-downloaded image. Then I simply took a guide camera image with MaximDL (it was 2x2 and looked good), started guiding, and it ran fine. After a couple of minutes, I started the Kelt target plan, and it started up fine, took the pointing image, the first target image, guiding kept running seamlessly. ACP console reported &quot;guider check OK.&quot; Few minutes later and everything's still going fine. A few hours later and everything's going fine. <br /> <br /> 21 Feb 2013: Problems with guiding, similar to some of the stuff we've seen the last few weeks. Plan started up, autoguiding started up just fine (from within the plan). Images (both science and guide) looked fine. But after a few minutes, the guide errors got bigger and systematic -- always in one direction. ACP stopped guiding because of the big errors. I aborted the plan. Took a guide image directly with MaximDL and started guiding from MaximDL. Once I verified it was going well, I started the plan anew, but MaximDL crashed after taking the first image. Homed and shut down the hardware. Closed all software. Started hardware and software back up. Started up the plan (without getting guiding going separately in MaximDL), and everything seemed to work fine. It's 20 minutes later and everything, including the guiding, is going smoothly. While the guiding was having its problems, I verified that the guide camera image was 2x2 binned. And it was. <br /> <br /> 24 Feb 2013: YETI 2x2 observing went just fine; there was a brief power outage on campus, but while the Mac in the control room went down, everything in the dome continued to operate normally and observing was never interrupted. After the YETI observing (and dark-taking) ended around midnight, I did some recreational observing till 5pm (automated) and then dawn flats in three filters were taken, without a problem. (The last few weeks, long periods of inactivity seemed to make the system more likely to fail when ACP finally issued pointing commands to the telescope via the Sky; that didn't happen this time, perhaps because the scope was actively being used for most of that time; and also, therefore, not tracking far to the west.)</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Problem_reports&diff=419 2013-02-06T05:27:30Z

<p>Dcohen1: Created page with &#039;1 Feb 2013: Six good hours of observing with a chain of ACP scripts, last script ended about 1:30 AM (darks and biases), scope pointing to the west and low. Scope doesn&#039;t home au...&#039;</p> <hr /> <div>1 Feb 2013: Six good hours of observing with a chain of ACP scripts, last script ended about 1:30 AM (darks and biases), scope pointing to the west and low. Scope doesn't home automatically (should it?) so I home it via The Sky and the software reports slewing but it never reports reaching home. I go to the observatory, physically, and find the scope's RA alarm on and the scope pointing west still. The Sky seems to have lost contact with the scope.</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=418 2013-02-06T05:23:49Z

<p>Dcohen1: /* Documentation */</p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location|Location: 39 degrees 54.426 minutes N latitude, 75 degrees 21.333 minutes W longitude]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Instrumentation ==<br /> We do both imaging and photometry with the Apogee large-format CCD camera and the filter wheel. We use the eShel spectrograph in conjunction with the SBIG camera for spectroscopy. The spectrograph and its camera along with its calibration unit are in the control room.<br /> <br /> * [http://www.ccd.com/alta_u16m.html Apogee U16M] 4096x4096 pixel camera, 9-micron pixels; 0.39 arcsec per pixel (unbinned) and 26.6 arcmin full field of view<br /> * [http://www.ccd.com/filterwheels.html Apogee filter wheel] with [http://www.omegafilters.com/index.php?page=prod_astro_index Omega Optical 50 mm square filters], Johnson-Cousins UBVR&lt;sub&gt;C&lt;/sub&gt;I&lt;sub&gt;C&lt;/sub&gt; and SDSS u'g'r'i'z'<br /> * [http://www.shelyak.com/rubrique.php?id_rubrique=7&amp;lang=2 Shelyak eShel] fiber-fed echelle spectrograph with SBIG ST-10 camera<br /> * Eyepieces<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report|Apogee Alta U16M Test Report (read noise, dark current)]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> * [[Notes on upgrading observatory computer to Windows 7]]<br /> * [[Observing Log|Observing Log (PDF template for paper log sheet in control room)]]<br /> * [[Problem reports]]<br /> <br /> &lt;!-- Comment below items out for now; badly outdated<br /> <br /> == To-do items, Summer 2010 (outdated, needs editing) ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> * [[WASP transit objects]]<br /> <br /> --&gt;<br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=417 2013-02-06T05:23:27Z

<p>Dcohen1: /* Documentation */</p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location|Location: 39 degrees 54.426 minutes N latitude, 75 degrees 21.333 minutes W longitude]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Instrumentation ==<br /> We do both imaging and photometry with the Apogee large-format CCD camera and the filter wheel. We use the eShel spectrograph in conjunction with the SBIG camera for spectroscopy. The spectrograph and its camera along with its calibration unit are in the control room.<br /> <br /> * [http://www.ccd.com/alta_u16m.html Apogee U16M] 4096x4096 pixel camera, 9-micron pixels; 0.39 arcsec per pixel (unbinned) and 26.6 arcmin full field of view<br /> * [http://www.ccd.com/filterwheels.html Apogee filter wheel] with [http://www.omegafilters.com/index.php?page=prod_astro_index Omega Optical 50 mm square filters], Johnson-Cousins UBVR&lt;sub&gt;C&lt;/sub&gt;I&lt;sub&gt;C&lt;/sub&gt; and SDSS u'g'r'i'z'<br /> * [http://www.shelyak.com/rubrique.php?id_rubrique=7&amp;lang=2 Shelyak eShel] fiber-fed echelle spectrograph with SBIG ST-10 camera<br /> * Eyepieces<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report|Apogee Alta U16M Test Report (read noise, dark current)]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> * [[Notes on upgrading observatory computer to Windows 7]]<br /> * [[Observing Log|Observing Log (PDF template for paper log sheet in control room)]]<br /> [[Problem reports]]<br /> <br /> &lt;!-- Comment below items out for now; badly outdated<br /> <br /> == To-do items, Summer 2010 (outdated, needs editing) ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> * [[WASP transit objects]]<br /> <br /> --&gt;<br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=416 2013-02-02T20:00:04Z

<p>Dcohen1: /* Documentation */</p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location|Location: 39 degrees 54.426 minutes N latitude, 75 degrees 21.333 minutes W longitude]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Instrumentation ==<br /> We do both imaging and photometry with the Apogee large-format CCD camera and the filter wheel. We use the eShel spectrograph in conjunction with the SBIG camera for spectroscopy. The spectrograph and its camera along with its calibration unit are in the control room.<br /> <br /> * [http://www.ccd.com/alta_u16m.html Apogee U16M] 4096x4096 pixel camera, 9-micron pixels; 0.39 arcsec per pixel (unbinned) and 26.6 arcmin full field of view<br /> * [http://www.ccd.com/filterwheels.html Apogee filter wheel] with [http://www.omegafilters.com/index.php?page=prod_astro_index Omega Optical 50 mm square filters], Johnson-Cousins UBVR&lt;sub&gt;C&lt;/sub&gt;I&lt;sub&gt;C&lt;/sub&gt; and SDSS u'g'r'i'z'<br /> * [http://www.shelyak.com/rubrique.php?id_rubrique=7&amp;lang=2 Shelyak eShel] fiber-fed echelle spectrograph with SBIG ST-10 camera<br /> * Eyepieces<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report|Apogee Alta U16M Test Report (read noise, dark current)]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> * [[Notes on upgrading observatory computer to Windows 7]]<br /> * [[Observing Log|Observing Log (PDF template for paper log sheet in control room)]]<br /> <br /> <br /> &lt;!-- Comment below items out for now; badly outdated<br /> <br /> == To-do items, Summer 2010 (outdated, needs editing) ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> * [[WASP transit objects]]<br /> <br /> --&gt;<br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=353 2011-01-06T06:07:16Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Instrumentation ==<br /> We do both imaging and photometry with the Apogee large-format CCD camera and the filter wheel. We use the eShel spectrograph in conjunction with the SBIG camera for spectroscopy. The spectrograph and its camera along with its calibration unit are in the control room.<br /> <br /> * Apogee 16M <br /> * filter wheel<br /> * Shelyak eShel<br /> * SBIG ST-10<br /> * eyepieces<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=352 2011-01-06T06:02:32Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Instrumentation ==<br /> <br /> * Apogee 16M <br /> * filter wheel<br /> * Shelyak eShel<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=351 2011-01-06T06:00:21Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=350 2011-01-06T05:59:49Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [http://www.rcopticalsystems.com/telescopes/24truss.html RCOS 0.61m truss]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=349 2010-12-30T23:55:41Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[Location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html Directions]<br /> <br /> == Telescope ==<br /> * [[Location]]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=348 2010-12-30T23:55:20Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> == Observatory ==<br /> * [[location]] <br /> * [http://astro.swarthmore.edu/observatory_directions/index.html directions]<br /> <br /> == Telescope ==<br /> * [[Location]]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=347 2010-12-30T23:52:56Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> The Observatory: [[location]] and [http://astro.swarthmore.edu/observatory_directions/index.html directions].<br /> <br /> == Telescope ==<br /> * [[Location]]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=346 2010-12-30T23:50:50Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> The Observatory: [[location]] and [http://astro.swarthmore.edu/observatory_directions/index.html|directions].<br /> <br /> == Telescope ==<br /> * [[Location]]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=345 2010-12-30T23:48:44Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> This website is for information relating to commissioning and operation of the Peter van de Kamp Observatory, funded by the National Science Foundation through its Program for Research and Education with Small Telescopes.<br /> <br /> The Observatory: [[location]] and directions.<br /> <br /> == Telescope ==<br /> * [[Location]]<br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> * [[Software/hardware troubleshooting and workarounds]]<br /> * [[Apogee Alta Test Report]]<br /> * [[Slit Width and Resolution]]<br /> * [[Autoguiding|Autoguiding]]<br /> <br /> == Documentation ==<br /> * [[Documentation| Software/Hardware Manuals]]<br /> * [[Local operation documentation]]<br /> * [[Focusing the telescope]]<br /> *[[Observing Log]]<br /> <br /> == To-do items, Summer 2010 ==<br /> * [[Task list]] - edit to add items or mark as completed.<br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> * Transiting Planets[http://astro.swarthmore.edu/~jsokol1/exoplanet.html]<br /> * [[Observing schedule|Observation Schedule]]<br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=196 2009-06-15T03:10:21Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> <br /> <br /> == Documentation ==<br /> * [[Software manuals]]<br /> * [[Local operation documentation]]<br /> <br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> <br /> <br /> == Observing Lists ==<br /> * [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=B_Stars&diff=195 2009-06-15T03:09:50Z

<p>Dcohen1: </p> <hr /> <div>Summertime targets from Rich Townsend (June 2009)<br /> <br /> Ap/Bp stars - chemically peculiar with strong magnetic fields<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> CU Vir (HD 124224) -- short period, quite bright, the best-known 'stellar pulsar' (main sequence star with ~0.5d pulsed radio emission).<br /> <br /> 14 12 15.8043 <br /> <br /> +02 24 33.958<br /> <br /> B = 4.89<br /> <br /> V = 5.01<br /> <br /> A0Vp<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 2052 Oph (163472), which is a combination beta Cep/He-strong B2 star with a 3.64d period. Again, quite bright.<br /> <br /> 17 56 18.4009 <br /> <br /> +00 40 13.277<br /> <br /> B = 5.883<br /> <br /> V = 5.834<br /> <br /> B2IV-V<br /> <br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 1671 Cyg (HD 184927), which is a bit dimmer, and has a longer period, but appears to have a very oblique, strong field (seen from near pole on). <br /> <br /> 19 35 32.0099 <br /> <br /> +31 16 35.926<br /> <br /> B = 7.29<br /> <br /> V = 7.44<br /> <br /> B2V<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=B_Stars&diff=194 2009-06-15T03:09:24Z

<p>Dcohen1: </p> <hr /> <div>Summertime targets from Rich Townsend (June 2009)<br /> <br /> Ap/Bp stars - chemically peculiar with strong magnetic fields<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> CU Vir (HD 124224) -- short period, quite bright, the best-known 'stellar pulsar' (main sequence star with ~0.5d pulsed radio emission).<br /> <br /> 14 12 15.8043 <br /> +02 24 33.958<br /> <br /> B = 4.89<br /> <br /> V = 5.01<br /> <br /> A0Vp<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 2052 Oph (163472), which is a combination beta Cep/He-strong B2 star with a 3.64d period. Again, quite bright.<br /> <br /> 17 56 18.4009 <br /> +00 40 13.277<br /> <br /> B = 5.883<br /> <br /> V = 5.834<br /> <br /> B2IV-V<br /> <br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 1671 Cyg (HD 184927), which is a bit dimmer, and has a longer period, but appears to have a very oblique, strong field (seen from near pole on). <br /> <br /> 19 35 32.0099 <br /> +31 16 35.926<br /> <br /> B = 7.29<br /> <br /> V = 7.44<br /> <br /> B2V<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=B_Stars&diff=193 2009-06-15T03:08:45Z

<p>Dcohen1: </p> <hr /> <div>Summertime targets from Rich Townsend (June 2009)<br /> Ap/Bp stars - chemically peculiar with strong magnetic fields<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> CU Vir (HD 124224) -- short period, quite bright, the best-known 'stellar pulsar' (main sequence star with ~0.5d pulsed radio emission).<br /> <br /> 14 12 15.8043 <br /> 02 24 33.958<br /> <br /> B = 4.89<br /> <br /> V = 5.01<br /> <br /> A0Vp<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 2052 Oph (163472), which is a combination beta Cep/He-strong B2 star with a 3.64d period. Again, quite bright.<br /> <br /> 17 56 18.4009 <br /> +00 40 13.277<br /> <br /> B 5.883<br /> V 5.834<br /> <br /> B2IV-V<br /> <br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 1671 Cyg (HD 184927), which is a bit dimmer, and has a longer period, but appears to have a very oblique, strong field (seen from near pole on). <br /> <br /> 19 35 32.0099 <br /> +31 16 35.926<br /> <br /> B 7.29<br /> V 7.44<br /> <br /> B2V<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=B_Stars&diff=192 2009-06-15T03:07:28Z

<p>Dcohen1: </p> <hr /> <div>Summertime targets from Rich Townsend (June 2009)<br /> Ap/Bp stars - chemically peculiar with strong magnetic fields<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> CU Vir (HD 124224) -- short period, quite bright, the best-known 'stellar pulsar' (main sequence star with ~0.5d pulsed radio emission).<br /> <br /> 14 12 15.8043 <br /> +02 24 33.958<br /> <br /> B 4.89<br /> V 5.01<br /> <br /> A0Vp<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 2052 Oph (163472), which is a combination beta Cep/He-strong B2 star with a 3.64d period. Again, quite bright.<br /> <br /> 17 56 18.4009 <br /> +00 40 13.277<br /> <br /> B 5.883<br /> V 5.834<br /> <br /> B2IV-V<br /> <br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 1671 Cyg (HD 184927), which is a bit dimmer, and has a longer period, but appears to have a very oblique, strong field (seen from near pole on). <br /> <br /> 19 35 32.0099 <br /> +31 16 35.926<br /> <br /> B 7.29<br /> V 7.44<br /> <br /> B2V<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=B_Stars&diff=191 2009-06-15T03:06:31Z

<p>Dcohen1: Created page with &#039;Summertime targets from Rich Townsend : Bp stars ------------------------------------------------------------------------------------ CU Vir (HD 124224) -- short period, quite ...&#039;</p> <hr /> <div>Summertime targets from Rich Townsend : Bp stars<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> CU Vir (HD 124224) -- short period, quite bright, the best-known 'stellar pulsar' (main sequence star with ~0.5d pulsed radio emission).<br /> <br /> 14 12 15.8043 <br /> +02 24 33.958<br /> <br /> B 4.89<br /> V 5.01<br /> <br /> A0Vp<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 2052 Oph (163472), which is a combination beta Cep/He-strong B2 star with a 3.64d period. Again, quite bright.<br /> <br /> 17 56 18.4009 <br /> +00 40 13.277<br /> <br /> B 5.883<br /> V 5.834<br /> <br /> B2IV-V<br /> <br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> <br /> <br /> ------------------------------------------------------------------------------------<br /> V 1671 Cyg (HD 184927), which is a bit dimmer, and has a longer period, but appears to have a very oblique, strong field (seen from near pole on). <br /> <br /> 19 35 32.0099 <br /> +31 16 35.926<br /> <br /> B 7.29<br /> V 7.44<br /> <br /> B2V<br /> <br /> <br /> <br /> ------------------------------------------------------------------------------------</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=190 2009-06-15T03:05:44Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> <br /> <br /> == Documentation ==<br /> * [[Software manuals]]<br /> * [[Local operation documentation]]<br /> <br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> <br /> <br /> == Observing Lists ==<br /> [[B Stars]]<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1 http://wikis.swarthmore.edu/telescope/index.php?title=Main_Page&diff=189 2009-06-15T03:04:28Z

<p>Dcohen1: </p> <hr /> <div>&lt;big&gt;Swarthmore College Observatory Wiki&lt;/big&gt;<br /> <br /> <br /> == Equipment and Technical Information ==<br /> * [[Spectrograph Setup]]<br /> * [[Dome Control]]<br /> <br /> == Documentation ==<br /> * [[Software manuals]]<br /> * [[Local operation documentation]]<br /> <br /> <br /> == Data Collection ==<br /> * [[Observatory Log]]<br /> <br /> <br /> == Observing Lists ==<br /> <br /> <br /> == Wiki Information ==<br /> * MediaWiki [http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet Cheat Sheet] and [http://en.wikipedia.org/wiki/Wikipedia:How_to_edit_a_page How To Edit a Page]<br /> * [[Sandbox]]</div>

Dcohen1