20180602
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 62k when viewing the raw GC2 images if there are no clouds and 35k if there are clouds. For VIRUS use the vsky.sh command found in the /home/mcs/astronomer/bin directory when GC2 counts reach 6.6k when viewing the raw GC2 images. Report any saturation issues.
Priorities
- WFS tests
- illumination tests
- GROC tests
- high priority on sky engineering tests
- Low priority on sky engineering tests
- Closed dome engineering tests
- Long cals
WFS tests
Go on sky with a full setup including 2 WFS stars and be sure to remove the ACAM since it can block some light going to the guide probes:
Things to test:
- Does center work
- once well centered do a mgp -poff to see if the x offset and y offset have the opposite sign and make sense
- once focus is well centered do a focus offset and see if the focus offset has the opposite sign and makes sense
- once the theta and phi are well centered make an offset of the fiducial on the TT camera. See if the theta and phi offset is seen by the WFS and drives the TT fiducial back to its original position.
- see if the WFS1 and WFS2 give roughly the same offsets for focus, theta and phi.
Report any issues or report there is a complete success.
Illumination tests
Please look at the illumination correction written to the Guider fits headers and see if near center of track they give a value near expectation, 0.89. If so and the sky is fairly photometric, then setup on a full setup over a full track in the south. Be sure to remove the ACAM as it can block some light going to the guide probes. Change both guiders between g,r,i every few minutes and save images so that we can look at the photometric zero points of both guiders in all 3 bands.
GROC tests
With the WFS running you should see a GROC offset at the bottom of the metrology data window. If the WFS focus offset is very close to zero does the GROC offset match the GROC offset that the TO would calculate. Report results.
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).
Get g, r, i photometric zero points
If conditions are reasonably photometric and the illumination correction seems to be working then setup on 9 different full setups near the center of track and save images in g, r, i. Run gethead FILTER FMAG FZPOINT PSFMAG *.fits on the gc1 and gc2 files and report this to het-operations. I think the new zero point for each filter should be PSFMAG + FMAG
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.
Closed dome engineering:
None at this time.
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:
