20170915
Priorities
- Any P0-3 science targets
- High priority Engineering tests
- P4 science targets
- Low priority Engineering tests
Twilight Tests
Note: Twilight exposures are critical science calibrations for LRS and VIRUS and if possible should be done every night that science data is taken.
High Priority Engineering
Globular cluster dither test with VIRUS
Purpose: Now that we have eliminated some of the drag problems we would like to test how dithering looks on VIRUS. Do this on a globular cluster (GC). Choose a a very rich wide GC. Want to put the center of the GC on one of the currently active IFU.
Good globulars that we have used in past, that are up now, are:
- NGC7078 = M15 18' wide
- NGC6205 = M13 20' wide
- NGC6341 = M92 14' wide
- NGC7089 = M2 16' wide
Procedure:
- Use do_shuffle to set up on the globular cluster on the BIB
- Get a star in a guider to hold the position.
- Get a star in the WFS to hold good image quality
- Run take vlexp dithered virus exposure of at least 120 seconds, note you might as well make it parallel with LRS2 as well but make virus the primary.
- repeat the exposure 2 more times.
- record end time in the log
Try to do this for 2 different globular clusters or the same globular in the East and West.
HET PSF measurement using the ACAM
Purpose: We would like to get measurements of the PSF far wings by looking at bright stars. We should do this a few times with different stack qualities to see how this changes. Note we should avoid the CCAS tower for this test. Since we are looking for the faint features this should be done when conditions are good and no moon is present.
Procedure:
- Make sure moon is down and seeing is somewhat stable.
- Select a 14th mag star with shuffle (avoiding Az 38 - 98 to keep CCAS out of the field of view) on BIB
- Setup on star on the BIB
- Get both guiders going with metrology going and saving images
- Get a WFS going and closed loop (note since the ACAM is in you might have to look at both WFS to get the one without the ACAM obstruction)
- Save 20 images of at least 5 seconds each.
- Note the RSE, time since stack, temp change since stack, tracker x and y, telescope az.
- Stop saving guider images
Repeat this for a few different conditions of the stack: Freshly stacked, RSE = 100, RSE=200, RSE=300
Repeat this for a few different tracker positions: early in track, center of track late in track etc..
Low Priority Engineering
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 about 2 times per week and when ever we get an unusually high or low temperature.
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 based on the wiki value and save an image.
- 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.
Closed dome:
Please do the following if you are closed (in order of priority):
- VIRUS 10 darks of 360 seconds
- VIRUS 200 ldls flats
- LRS2 dark 1800s x3
- FeAr 1800s red x4
- FeAr 1800s blue x4
See the long cals page for more information:
