20171019

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.

Find the HPF CB Fibers

Purpose: We have installed a new set of Coherent Fiber Bundles in the IHMP. Both of these feed the same camera, the new HPF CFB camera. We want to determine the location of these two CFB fibers on the ACAM. They might be located near:

Center CFB : (150, 258) Side CFB : (220, 185)

or less likely near:

central CFB (153, 555) pixels Side CFB will be at (225, 625) pixels on the ACAM.

Procedure:

• Open the PFIP shutter so you can see the light in the CFB
• Try putting a bright 5-8 mag star near the locations above and see if you get any light.
• If it works then try putting a fainter star near this location.
• Once you have the star centered put in the ACAM with the I filter and determine the pixel position.
• Close the PFIP shutter when done.

Report the positions to het-operations list and in the RA log

Characterize the HPF CB Fibers

Purpose: We would like to know the orientation of the two CFB bundles, ie. any flips or rotations required. This might not be easy since to get a guide star in a guider and a star near the locations found in the test above really requires shuffle to have these locations known and that might take a little inventive guess work to get it set right.

Try adding the following to the fplane.txt file and see if that puts you close to the right spot 600 50.0 0.0 902 902 902 0.0 1.0 or 600 -50.0 0.0 902 902 902 0.0 1.0 then from shuffle use IFU slot 600 and check the fake acam and see if a star falls near the right ACAM pixel based on the previous test.

Assuming you can figure out some way to do this then try:

Procedure:

• Open the PFIP shutter
• Get the star guiding on a guider and imaged in the center of the CFB.
• Save an image
• Check the header of the saved image to make sure that structure Az and other important information is being saved.
• Offset by a few arcseconds (so that the star is still imaged in the CFB but near the edge).
• Save an image and report the offset type, size and image in the RA_log and in an e-mail to het-operations
• Repeat for the other directions.

Low Priority Engineering

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..

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.