20180521
Twilights
LRS2 and VIRUS twilights should be taken at the center of track position. Please take them back to back as quickly as possible. For LRS2 try lsky.sh command found in the /home/mcs/astronomer/bin/ directory when GC2 counts reach 22k when viewing the raw GC2 images. For VIRUS use the vsky.sh command found in the /home/mcs/astronomer/bin directory when GC2 counts reach 4.7k when viewing the raw GC2 images.
Priorities
- Any P0-3 LRS2 or VIRUS science targets paying attention to the modified priority to help guide choices
- High priority On sky engineering tests
- Any P4 Science targets
- Low priority on sky engineering tests
- Closed dome engineering tests
- Long cals
High Priority On sky Engineering
Back to back flux standards on different IFU
The idea is to tie the standards we are taking on different IFU slots. Near the center of track on a fairly photometric night observe in the 022 and then the 046 IFU slots.
Procedure:
- Select a VIRUS spectrophotometric flux standard
- Setup on a flux standard for IFU slot 022 about 15 mintutes before the center of track. Use target_setup -cat spc -ifu 022 Indexnum {E|W}
- observe this flux standard for at least 1 minute on each dither
- if you have not taken a VIRUS flux standard for this night mark this as a flux standard.
- Setup on the same flux standard for IFU slot 046. Use target_setup -cat spc -ifu 046 Indexnum {E|W}
- observe this flux standard for at least 1 minute on each dither
- mark this as an engineering target and charge the time to engineering time of type ENG18-2-004
- Do a total of 10 sets to complete the test (this can be the same flux standard but on different tracks (E/W or different nights).
Low Priority On Sky Engineering Tests
Testing of the ACAM position
Purpose: We want to see if the ACAM position changes with respect to the IHMP over time. We want this data every night and when ever we get an unusually high or low temperature. It would be good to vary the Az as well.
Determine the Center of the BIB:
- Select a 14th mag star in a reasonably rich field with shuffle for the BIB
- Setup on the very center of the BIB field of view and save an image note any differences from the wiki center position.
- Guide on one of the guide probes
- Put in the ACAM and save an shallow image with the target star not saturated.
- Report on the position of the BIB in the night report and on NightOperations/Commissioning/Results
- Save a deeper image which should show more than a dozen stars.
Determine the Center of LRS2-B
- Select a 14th mag star in a reasonably rich field with shuffle for the LRS2-B
- Setup on LRS2-B and start guiding on one of the guiders
- Take LRS2-B spectrum, probably 60 seconds.
- Adjust the position so that the star is at the center of LRS2-B IFU using lmap until the offsets are less than 0.3"
syscmd -T 'Guider1_offset_fiducial ( dx_asec=-0.01,dy_asec=0.55,compensate="false")'
- Confirm the star is at the center of the IFU by taking a spectrum.
- Once it is as the center of the IFU put in the ACAM and take a shallow image so that the star is not saturated.
- Report on the position of the LRS2-B in the night report and on NightOperations/Commissioning/Results
- Take a deeper image so that there are large number of stars.
Determine the Center of LRS2-R
- Select a 14th mag=== Testing of the ACAM position === star in a reasonably rich field with shuffle for the LRS2-R
- Setup on LRS2-R and start guiding on one of the guiders
- Take LRS2-R spectrum, probably 60 seconds.
- Adjust the position so that the star is at the center of LRS2-R IFU using lmap until the offsets are less than 0.3"
- Confirm the star is at the center of the IFU by taking a spectrum.
- Once it is as the center of the IFU put in the ACAM and take a shallow image so that the star is not saturated.
- Report on the position of the LRS2-R in the night report and on NightOperations/Commissioning/Results
- Take a deeper image so that there are large number of stars.
Testing LRS2-R fringing
The idea of this test is to look for changes in the fringing pattern during a trajectory. We want a series of short LRS2-R exposures over a full track. The target star should be a brightish (but not saturated) blue star.
Procedure:
- Select a blue star (early F or bluer) from the ugriz catalog a little before start of track
- Setup on the LRS2-R using target setup
- Take a test exposure to set exposure times (probably around 30 seconds for g=10) to get 20k peak at the start of the track (which will likely rise to 40k by mid track).
- Take many engineering exposures to fill the track (use -t eng and -N options when prompted by iexp for the vlexp options)
- Charge the time in the program section to ENG18-2-003
HPF engineering targets
If you have a hole in the queue, either caused by the bright moon or just a lack of targets, consider doing any active HPF engineering targets.
Closed dome engineering:
Testing the new FCU baffles
The purpose of this test is to see how much light we have leaking in and around the new temporary baffles on the FCU. If they work well then we can take cals with the lights on.
Procedure:
- Insert the FCU head through the TCS gui
- make sure the dome lights are off
- Remove the ACAM and CWFS mirrors
- take a 3 minute exposure syscmd -l 'expose( seconds=180, x_binning=1, y_binning=1, type="tst", object="FCU baffle test, no dome lights", observation=1234, exposure=1 )'
- this will return a prompt immediately but you can monitor it through the LRS2 log.
- wait for the previous exposure has written to disk
- turn on the dome lights
- take another 3 minute exposure syscmd -l 'expose( seconds=180, x_binning=1, y_binning=1, type="tst", object="FCU baffle test, dome lights on", observation=1234, exposure=2 )'
Long cals
Please do the following if you are closed (in order of priority):
- VIRUS 200 ldls flats
- VIRUS 10 x 360s darks
- LRS2 dark 1800s x3
Report that they are done via e-mail to het-operations and also update the cals list: NightOperations/SciencePlans/longcals
See the long cals page for more information:
