Date
Name
Other Observers
Instrument
Hours Observed
Hours Lost
Reason
Observing Program
06/23/2021
Gary Henson
Rutherford
Andor CCD
7
2.5
Clouds
Asteroid 18488 Light Curve Dec Oscillation at around -1 HA while tracking object. Problem appeared as reported by other observers, went to Zenith park and then back on target with no further occurrences. Band of cirrus clouds after midnight. Seeing and tracking with autoguider excellent most of night.
06/20/2021
Tomomi Otani
Andy Baran
Andor CCD
12
0.3
Software/Control PC Issues
Photometry time series of a hot subdwarf star. Thank you very much, Brian, for adding the decimal points to the observation time of the image header. Everything was good but the telescope started moving to the DEC direction at the Hour Angle ~ +3 hours. This was the same issue that we experienced the last night, so it may repeat again in future.
06/19/2021
Otani
Andy Baran
Andor CCD
12
0.5
Software/Control PC Issues
Photometry time series to check pulsations. The telescope suddenly started moving to the DEC direction (the target's y position moved 2 pixels/image). So I moved the telescope to the zenith and moved it back to the target, then the issue was solved. The camera connection suddenly disappeared while taking images, so I used the regular procedure to reconnect the camera. The header's observation time did not have decimal digit (so we could not obtain less than 1 second accuracy).
06/18/2021
Michael Fauerbach
NA
CCD
9
3
Clouds
Clouds off and on throughout the night. Heavy cloud cover in the morning.
06/16/2021
Kurtis Williams
Mabel Clausen & Harum Ahmed (REU students)
N/A
0
12
Clouds
A text note was open on the desktop saying that due to testing the telescope limits had been disabled and the telescope should not be used. Was that a one-day affair, or is this ongoing for multiple nights? If the latter, perhaps a note should go out to sara-tech... (This didn't affect us since clouds were thick and the weather forecast poor)
06/14/2021
Stephen Levine
C. Zuluaga, A. Bosh
Andor Camera
1
9
Equipment Failure
Outer solar system astrometry and Pluto occultation. When trying to pre-set to the night's occultation field, which was going to be very low and rising, the telescope became stuck in the limits and would not back out. No motions responded from the hand paddle. In the end, we closed things up as it was.
06/13/2021
Yong Sheng
None
CT griz
13
0
No problems to report
Clemson Blazar study.
06/11/2021
Ken Rumstay
None
CCD camera
12.5
0
No problems to report
AGN monitoring program. An excellent night, with a dark sky and sub-arcsecond seeing.
06/10/2021
William Keel
3 cats
Andor CCD
7.5
0
No problems to report
Nebulae, galaxies behind dust. Focus=126500, guider focus 9000.
06/09/2021
Stephen Levine
C. Zuluaga, A. Bosh
Andor Camera
2
0
No problems to report
Outer solar system astrometry.
06/07/2021
Steve Gillam
None
Andor Camera
12
0
No problems to report
ROAp stars
06/02/2021
Michael Fauerbach
NA
CCD
7
4
Equipment Failure
As mantioned in my email to sara-tech, the whole telescope computerACE crashed after a CCD abort. After recovering, the Default DEC Encoder fault kept flashing. Tried to reboot computer etc but nothing got rid of it. I was able to park, close the covers and close the dome shutters -at least it said it did. I have not seen this error before, and I was not able to recover from it.
06/01/2021
XIANMING HAN
none
CCD
10
0
No problems to report
eclipsing binaries
06/01/2021
XIANMING HAN
none
CCD
0
10
Clouds
none
06/01/2021
XIANMING HAN
none
CCD
0.25
10
Clouds
eclipsing binary
05/31/2021
Tom Rutherford
None
CCD
7
0
No problems to report
Landolt Fields. Open Clusters. No problems at all.
05/28/2021
Tom Rutherford
None
CCD
0
9
Clouds
Clouds all night-- unable to open.
05/27/2021
Tom Rutherford
None
CCD
7
0
No problems to report
Landolt fields. No problems-- everything worked perfectly.
05/16/2021
Fauerbach
NA
CCD
8
3
Clouds
asteroid photometry. Clouds the first three hours, else fine
05/15/2021
Michael Fauerbach
NA
CCD
8
2
Clouds
Clouds early in the morning Filterwheel 2 is not responding to commands
05/14/2021
Stephen Levine
C. Zuluaga, A. Bosh
Andor Camera
11
0
No problems to report
Outer solar system astrometry. One instance where the tracking stopped. Not clear why. Able to re-enable and keep going.
05/13/2021
Leila Alamos
Stephen Gillam
Andor Camera
12
8
Clouds
Observing Program: ROAp stars Problems: It was very cloudy during the entire observation Suggestion: Filter wheel 2 might indicate a problem due to its constant blinking. *relates to the May 11th and May 12th night of observation
05/13/2021
Leila Alamos
Stephen Gillam
Andor Camera
12
6
Humidity
Observing Program: ROAp stars Problems: Humidity was very high towards the end of the night and so we had to pack up early. Suggestion: Filter wheel 2 might indicate a problem due to its constant blinking.
05/10/2021
Stephen Levine
C. Zuluaga, A. Bosh
Andor Camera
0
11
Clouds
Outer solar system astrometry.
05/09/2021
Steve Gillam
None
None
0
13
Connection Issues
ROAp stars A recent update to windows 10 killed the Cisco VPN client on my computer. I was unable to reinstall it. This is the 7th time in the last 3 years that I have had to reinstall the Global VPN client, the Cisco VPN client, the DNE program, and run Winfix.exe after a Windows update. Running winfix.exe corrupted the Windows Installer neccessitating a complete reinstallation of my Operating system. I strongly recommend replacing the Cisco VPN service, which is no longer supported by Cisco, with one that is supported and compatible with Windows 10.
05/07/2021
Michael Fauerbach
NA
CCD
0
10
Clouds
Never opened cloudy all night
05/07/2021
Todd Christopher Hillwig
None
Andor CCD
10
0
No problems to report
None.
05/01/2021
Todd Christopher Hillwig
None
Andor CCD
10
0
No problems to report
PN central star monitoring
04/29/2021
Tom Rutherford
Henson
CCD
5
0
No problems to report
Southern T Tauri stars. No problems-- everything worked well.
04/27/2021
Gary Henson
Rutherford
Andor CCD
4
1
Equipment Failure
Lost first hour when Altitude Limit tripped. Telescope not near horizon, but Slew not recovered until ACE turned off switch to move telescope. Pointing, tracking, filter wheel sequence all worked fine so observations excellent once started.
04/26/2021
Walter Van Hamme
samec
camera
null
0
No problems to report
Observations of active solar type binaries.
04/24/2021
William Keel
3 cats
Andor CCD
11
0
No problems to report
H II regions near and far. Explored stray light mitigation by doing images with shutter open and telescope covers closed. Early on, a span of panic when it appeared that stars left charge trails along -y but this seems to have been asymmetric telescope bounce. Focus 126800, guide focus 2000. Pleased to see that the Andor CCD can recover control after an abort just by reopening the "observations" panel in ACE software. Guider was not able to correct for NS telescope motions near -65, 1hr west.
04/22/2021
William Keel
3 cats
Andor CCD
5
5
Clouds
Galaxies in H-alpha, checking out stray light. Focus=127800, guider focus 2000. Guider parameters had been corrupted; reset to X speed = Y speed=1, angle=0. The stray light between filters is puzzling - it looks brighter (in ADU/minute) in H-alpha than in R, and only slightly dimmer in B than in R. Its contrast across the field does seem to change with filter.
04/21/2021
Alex McDaniel
Yong Sheng, Dieter Hartmann
CT
6
5
Humidity
Blazar Photo z measurements
04/18/2021
Saida Caballero
Kamp, Le, Fowler, Richards, Miorelli
CCD
12
0
No problems to report
Photometric survey Be stars.
04/17/2021
Todd Hillwig
None.
Andor CCD
9
1
Clouds
PN central star photometry
04/16/2021
William Keel
3 cats
Andor CCD
11
0
No problems to report
Dead quasar survey, H II regions, stray-light checkout. Focus=128300, seeming finicky tonight.
04/15/2021
Stephen Levine
C. Zuluaga
Andor Camera
11
0
No problems to report
Outer solar system astrometry. No issues to report.
04/14/2021
Stephen Levine
C. Zuluaga
Andor Camera
12
0
No problems to report
Outer solar system astrometry, and basic testing of new Andor camera to understand the performance in the various modes. Looks good.
04/12/2021
Ken Rumstay
None
CCD camera
9
0
No problems to report
AGN monitoring program No problems to report Optimum focus = 127800 at T = 16 Celsius Telescope pointing after slew not perfect, but target was always within CCD filed.
04/11/2021
Ross Silver
Dieter, Yong
CCD
11
0
No problems to report
Photometric redshifts of BL Lacs.
04/06/2021
XIANMING HAN
Andrew Gebken
CCD
8.5
0
No problems to report
eclipsing binary
04/06/2021
XIANMING HAN
Andrew Gebken
CCD
8
0.5
Clouds
eclipsing binary
04/06/2021
XIANMING HAN
Andrew Gebken
CCD
8.5
0
No problems to report
eclipsing binary
04/06/2021
XIANMING HAN
Andrew Gebken
CCD
8.5
0
No problems to report
Eclipsing binary
04/06/2021
William Keel
3 cats
Andor CCD
11
0
No problems to report
Dead quasar survey, Andor CCD checkout. Focus 128000, guider focus 2000. Found potential gotcha when recovering from sequence abort - CCD came back in 3 MHz readout instead of previously set 1 MHz; bought myself some noise for the next hour or so. There is a diffuse pattern in darks at about 1 ADU/minute which looks like a light leak but persists at night so it seems to be an actual property of the chip.
04/01/2021
Todd Hillwig
None
Andor CCD
10
0.5
Equipment Failure
Telescope routinely pointed about 10 arcminutes to the north. This was corrected every time by simply hitting "Send" a second time, at which point the telescope pointed correctly with the target in the inner third of the chip.
03/29/2021
Gary Henson
Rutherford
Andor CCD
0
6
Other
NOTE: this happened night of 4/28 so 4/28 report is really for 4/26, don't see way to edit old reports so submitting with wrong date for some completeness of logs. Power Failure at Dome just after flats, Power out 4+ hours but all systems came back up once power restored. Uncertain of failure cause and night half gone so closed up and quit early.
03/28/2021
Tom Rutherford
Henson
CCD
6
0
Other
Asteroid light curve. Due to the filter wheel issue, I set wheel #2 to clear (where it was supposed to have been already, but wasn't) and moved wheel #1 to "R." Both wheels seemed to behave normally. Did no filter changes from this point onward-- everything else behaved properly and I had no problems with the scope except for a sudden jump toward the south by an arc minute or so (something that has happened to me before with CT) halfway through the run.
03/24/2021
James Webb
keslo Estil
CCD
4
0
Other
Imaging nebula and galaxies Tracking was horrible at 2 hours before transit. Not even the auto guider could correct guiding errors. Every where else, tracking was great.
03/22/2021
Yong Sheng
Alex McDaniel, Dieter Hartmann
g, r, i, z filters of CT
1
10
Equipment Failure
We can't observe because of the filter issue on the wheel 2. It won't change to the correct filter, and it got stuck.
03/18/2021
Stephen Levine
Carlos Zuluaga
Imaging camera
11
0
No problems to report
Outer solar system astrometry. At sunset, clear, T=12.6C, RH=56%, Windspeed=4.4mph A smooth night.
03/17/2021
Keefe Kamp
Caballero, Zamora
CCD
10
0
No problems to report
Observed Comets for ObsAstro Class and Standard Feilds with help from guide camera for ETC. Everything behaved normally
03/13/2021
Todd Christopher Hillwig
None
FLI CCD
10
0
No problems to report
PN central star monitoring. Only used Filter Wheel #1 and had no issues with it.
03/12/2021
William Keel
3 cats
FLI CCD
10
0
No problems to report
Dead quasar survey, galaxy dust lanes. Focus 132200. guider focus 2000.
03/11/2021
Martha Leake
students
FLI Cam
2
7
Clouds
Added comment: I attempted to change filters from SDSS_R to empty, in order to use the Bessel filters in Wheel 1. The filter change didn't progress, and looked like a blockage of the frame. Ran the initialization of Wheel 2 with unknown success. Filter remains sdss_r.
03/11/2021
Martha Leake
Students in Tools class
FLI Cam
2
7
Clouds
80 percent high clouds, star fields visible through it, however. Predicted high humidity reached near morning twilight. Student participation delayed because of local connection issues.
03/08/2021
Ross Silver
Yong, Alex, Dieter
CCD
0
10
Equipment Failure
Photometric redshift of blazars. Filter wheel 2 is still not reliable and working consistently, therefore we could not observe.
03/06/2021
Amy Lovell
CCD
10
0
No problems to report
Objects for lab - images and lightcurves
03/05/2021
Saida Caballero
Malagon
CCD
10
0
No problems to report
Standard star fields. No issues to report.
03/04/2021
Amy Lovell
AST200L: Kimbarl King Krahm Nguyen
CCD
8
0
No problems to report
Imaging a variety of objects with AST200 lab students
03/03/2021
Keefe Kamp
Caballero
CCD
4
0
No problems to report
Observed Various Targets with Observational Astronomy Class. Telescope tracking seemed slightly off as stars were elongating even with short (~10 sec) exposures.
02/26/2021
Saida Caballero
N/A
CCD
0
10
Clouds
Too cloudy to open. From previous night (24 Feb) forgot to mention that the guide camera was not working. Did not test it tonight.
02/25/2021
Saida Caballero
Kamp, Klare, Le, Zamora
CCD
10
0
No problems to report
Class project for creating an Exposure time calculator. No problems to report. CCD was back online after having stopped when aborted the night before.
02/24/2021
Saida Caballero
Kamp
CCD
10
0
Software/Control PC Issues
Starting taking darks before the end of the night and had to abort the observations for morning flats. Followed the restart instructions for the camera (even restarted both computers) and was not able to get the camera back online. Message is "Exposure start failed."
02/21/2021
Amy J Lovell
CCD
6
5.5
Equipment Failure
Started okay, but then camera disconnected, required ACE intervention. Once restored, no problems to report.
02/20/2021
Núria Torres-Albà
Yong, Alex, Dieter
SARA CT
7
1
Software/Control PC Issues
Clemson University blazar observations Problems: Sequence tool got stuck and we had to restart ace control software
02/18/2021
Amy Lovell
Kimbarl, King, Krahm, Nguyen
CCD
9.5
0
No problems to report
A few of the images had some streaks of interrupted tracking, otherwise all was well.
02/16/2021
Martha Leake
Students in two classes observed
FLI Cam
10.5
0.3
Equipment Failure
Demonstration objects and asteroids (light curves). Most everything worked well, but a few glitches. On last asteroid in the 12:54 RA, -9 17 Dec (meridian area), a 240 second exposure had short streaks--a slippage? This short streak was repeated on each subsequent frame--not as if tracking stopped--it was engaged (and not red), but perhaps a slip. Two slews were so long I used the Stop button, then went to the object without problem. One of these was adjusting HA to 00:00 for the final parking at +15 deg Dec. After the streaks I moved to zenith park, tested a no-tracking streak of different lengths, and then tracked (aimed near zenith) and tracked the area. No problems appeared. I expected high humidity tonight but it did not exceed 72% (at start). Early on, noted ds9 wasn't displaying data (just image); Tried the XPA. Closed ds9, started Ace connector on camera computer, followed by reopening ds9 and using the telescope computer to take pictures. This worked (and is in the manual). Focusing poor, seeing not the 0.6 " advertised on Tololo conditions. Remembered to disconnect vpn link when done.
02/14/2021
Ross Silver
Dieter Hartmann
CCD
0
9
Equipment Failure
Photometric redshifts of BL Lacs.
02/13/2021
Martha Leake
Logan Spooner
FLI Cam10.7
10.7
0
No problems to report
Student targets (M92, LMC) and asteroids 445 Edna and 13093 Wolfgangpauli. Parked telescope at HA = 00:00 and Dec = +15. NIce weather. No problems other than busy day just prior to run.
02/11/2021
William Keel
3 cats
FLI CCD
8.5
0
No problems to report
Merging and backlit galaxies. Focus 132500, guider focus 0. Used only filter wheel 1 with no problems. When moving to park at dec +30, ACE control gave error message about faulty dec encoder. Compared to KP, CT computer gave UT 22 seconds slow (and KP agreed with cellphone time to a second or so).
02/10/2021
James Raymond Webb
Viviana Arroyave, Keslo Estil
CCD
6
0
No problems to report
Blazar monitoring and imaging galaxies
02/08/2021
Yong Sheng
Meenakshi Rajagopal
SARA CT
0
10
Software/Control PC Issues
Study BL Lacs Problem: Can't use the filters in wheel 2, the filter options are in grey
02/07/2021
Ken Rumstay
None
CCD camera
0
10
Equipment Failure
The #1 filter wheel is not operating, as noted by Amy Lovell last night.
02/06/2021
Amy Lovell
none
CCD
2.5
8
Equipment Failure
Filter Wheel 1 is unresponsive: INIT Wheel 1 just continually displays "Finding HOME for Wheel 1" and never returns.  All filters in Wheel 1 are grey.  The filter wheel window also persists after closing the Science Camera.  Any attempt to fool the wheel by selecting a filter in the sequence tool is similarly met with no response. The camera reset procedure (from the text file on the desktop) does not fix this, whether with the Observations window or the whole ACE software. Reboot of either or both computers in any order doesn't fix. After the resets, etc, the camera will expose and write an image, with "---" in the FILTER field, but the filter may have been stuck on B or between B and V.
02/05/2021
William Keel
3 cats
FLI CCD
8.5
0
No problems to report
Focus 133000; Guider focus 0. Near the meridian at dec -69, there were frequent instances of the telescope bobbing N-S by 5” or so that the guider took 5 minutes to correct. After recent nights, I kept closer track of the CD temperature and took multiple darks during the night to see whether hot pixels are really changing that fast. Two darks during twilight were suspiciously bright - light may be leaking around the shutter.
02/04/2021
Walter Van Hamme
Samec
FLI
8
0
No problems to report
All went well. Observations on EI Oct and WISEJ051352.5-170113. The network did kick me out 20 or so times but I was able to easily connect again.
02/03/2021
Saida Caballero
Kamp, Class
CCD
10
0
No problems to report
Class observing and standard star field. X-stage guider did not seem to like moving to the W fields. Had to reinitialize. Guiding worked very well. We did reach the horizon limit when trying to slew away from it, but were able to move the telescope with the paddle and slew normally.
02/02/2021
Keefe Kamo
Saida Caballero, Natalia Malagon
CCD
11
0
No problems to report
Observed Standard Fields for CCD calibration utilizing Guider
02/01/2021
William Keel
3 cats
FLI CCD
8
0
No problems to report
Galaxies, supernovae, Surveyor 2 Centaur stage. Focus 131500, guider focus 0. Guider stage will only reach positions 0 and E1. There was an error message FAULTY ABSOLUTE DEC ENCODER on ACE screen; unsure when it appeared.
01/31/2021
Keefe Kamp
Caballero, Le, Klare
CCD
11
0
No problems to report
Standard Star Feilds taken for calibration. The only problem that occurred was accidentally pressing abort twice and needing to follow the notepad instructions to reconnect the camera.
01/31/2021
Amy Lovell
King
CCD
3
3
Connection Issues
student training, images for lab analysis, connection problems at this end, tried to find the right pointing offset a few times
01/31/2021
Amy Lovell
Krahm
CCD
2
7
Clouds
Student training, thin clouds rolled over after not too long
01/27/2021
Van Hamme
Samec
FLI camera
9
3
Equipment Failure
Observations of Eclipsing Variables, EI Oct and WISEJ051352.5-170113. Network problems. connection very weak. Closed down multiple times. Very slow reacting.
01/27/2021
Walter Van Hamme
Samec
FLI camera
12
0
No problems to report
Observations of Eclipsing Variables, EI Oct and WISEJ051352.5-170113.
01/27/2021
Van Hmme
Samec
FLI Camera
12
0
No problems to report
Observations of Eclipsing Variables, EI Oct and WISEJ051352.5-170113.
01/25/2021
Tomomi Otani
Andy Baran
CCD
9
0
No problems to report
Hot Subdwarf stars photometry time series. Focus 134700 at the beginning of the night, and I needed to increase it later. The weather was good but some clouds came during the second half of the night. Telescope was working well.
01/23/2021
Tom Rutherford
Gary Henson
CCD
5
3
Clouds
Cloudy first part of the night, but cleared around local midnight. The telescope and CCD worked perfectly.
01/22/2021
Walter Van Hamme
Samec
FLI Camera
8
0
No problems to report
Observations of Eclipsing variables WISE051352,5-170113 and EI Oct.
01/22/2021
Walter Van Hamme
Samec
FLI Camera
8
0
No problems to report
Observations of Eclipsing variables WISE051352,5-170113 and EI Oct.
01/20/2021
Tomomi Otani
No one
CCD
7
0
No problems to report
Subdwarf B star photometry time series for searching for companions. Everything was working well and the weather was good too.
01/19/2021
James Webb
Keslo Estil
CCD
6
0
No problems to report
Galaxy imaging
01/18/2021
Núria Torres-Albà
Dieter Hartmann
-
8
0
No problems to report
Clemson University Blazar Observations. No problems to report.
01/15/2021
Ken Watanabe
Nick Rimbert
None
0
9
Connection Issues
Not able to keep connection using cisco vpn on win 10. Not other way to connect?.
01/09/2021
Ken Rumstay
None
CCD camera
9
0
No problems to report
AGN monitoring program No problems to report. Telescope tends to point north of target, as noted by Bill Keel. Optimum focus 131000 at 12 Celsius. CCD temperature was -28 Celsius at start; it cooled to -30 within an hour and remained there.
01/08/2021
William Keel
3 cats
FLI CCD
8.5
0
No problems to report
Test drive, galaxies in H-alpha. Focus=133000. Even after initialization, the guider x-stage has limited movement; to the west it can’t quite reach W1. The NSEW directions are 180 degrees rotated from their previous directions; +x is to the east and +y to the north. The guider settings for x and y speed and angle are 1,1,0 (sign changes on the speeds from previous values). The guider focus is close to 0. Guiding works well; in some parts of the sky there were oscillations of 1-2” lasting several minutes, as if the slow-motion controls didn’t have enough authority in those locations. There was one complete guide failure where the stars wandered around by 30 arcseconds. Evening twilight flats showed a very large elliptical “Eye of Sauron” pattern which is new; bright in some filters and dark in others. There are also three new narrow features looking almost like scratches. I’ll check in the morning to see how reproducible these flat-field features are and compare sensitivities using Landolt standards with the latest pre-shutdown values. The cooler is struggling even with set point -30 C - the reported value ranged from -22 to -28.
05/27/2020
Xianming Han
none
CCD
7
1.5
Software/Control PC Issues
Observed eclipsing binary. 1. The ACE control cabinet needed rebooting at the beginning of the night. 2. The FWHM was spreading too widely for the same focus position, so that the auto focusing was confused about what is the best focus position. Solution: narrow down the search range. 3. Telescope lost tracking about 2 hours before the end of the night. Once that was fixed, the dome lost tracking It turns out the dome does not move at all, not even manually. So closed the telescope.