20191016

Priorities

• Any P0 or P1 19-3 science or engineering targets [Note that some of the high priority science targets in htopx belong to the engineering tests below]
• Other High priority on sky engineering tests
• Any P2-P4 19-3 science or engineering targets
• Any 20-1 targets (later)

Twilights

HPF, LRS2 and VIRUS twilights should be taken at the center of track position. Please take them back to back as quickly as possible.

Testing the new orientation for guiders

We have installed new orientation angles for the guiders and hope that we got the sign correct. If not call Jim and have him revert or change the sign.

Procedure:

• Choose a 14th mag star to setup on the IHMP at an Az in the West or NE (Az < 60)
• Setup on IHMP and make sure you have good focus and theta/phi with WFS (note you will loose the WFS later so do not close the WFS loop).
• Center the guide stars in the guide probes
• Offset Guider 1 and Guider 2: syscmd -T 'Guider1_offset_probe (dx_ang=5,dy_ang=4)' syscmd -T 'Guider2_offset_probe (dx_ang=5,dy_ang=4)'
• setup integral term guiding on ACAM syscmd -T 'ACQ_tune(kd=0,ki=0.2,kp=0.8)'
• guide on the ACAM with a box big enough to allow for a 12" offset used later
• Set the fiducial on Guider1 and Guider2 but continue to guide on ACAM.
• Make sure the guide boxes on Guider1 and Guider2 are big enough to allow an offset used later.
• Note the time in the log and start saving images on ACAM, Guider1 and Guider2 for 3 minutes
• Offset fiducial on Guider1 syscmd -T 'Guider1_offset_fiducial (dx_asec=-9.9,dy_asec=-5.2,compensate="false")'
• Offset fiducial on Guiider2 syscmd -T 'Guider1_offset_fiducial (dx_asec=-9.9,dy_asec=-5.2,compensate="false")'
• Offset fiducial on ACAM syscmd -T 'ACQ_offset_fiducial (dx_asec=-9.9,dy_asec=-5.2,compensate="false")'
• Allow the the guide star on the ACAM to move to the new fiducial and settle down.
• Once settled Note the time in the log and collect 3 more minutes of images.
• Change the integral term back to zero syscmd -T 'ACQ_tune(kd=0,ki=0,kp=1.0)'

If the Guider fiducials go to where the guide star goes to within a degree then we are good. If GC1 is off by 7(?) degrees then we got the sign wrong and need to call Jim to get this reverted or the sign changed in TCS.

P1: high-speed BIB imaging test (take 1x per night)

see ​HighSpeedBib for instructions

P2: CCAS-CWFS test (take ~2x per bright time)

see 20190419 Science Page for instructions

High Priority Engineering Targets in htopx

ENG19-2-004: Contemporaneous LRS2-B and VIRUS SPC observations of faint stars

This is for grey or dark time only.

LRS2 is well-calibrated but VIRUS sometimes shows wavelength-dependent slopes/gradients -- the goal is to cross-calibrate VIRUS with LRS2-B.

This program requires most clear conditions.

We want to observe a SPC (~19th mag) on LRS2-B and 1 VIRUS IFUs/amp. This can be done in grey time immediately before/after HETDEX observations.

The goal is to get at least one of these each clear night.

You can find the trajectory offsets on mcs in /home/mcs/astronomer/VLSPC_jumps/

Some of these .txt files while have notes that no guide star could be found to make the jump in which case you will just run the two different setups as separate trajectories.

ENG19-2-004: Contemporaneous LRS2-B and VIRUS SPC observations of bright stars

This is for grey or dark time only.

LRS2 is well-calibrated but VIRUS sometimes shows wavelength-dependent slopes/gradients -- the goal is to cross-calibrate VIRUS with LRS2-B.

We want to observe a SPC (~15th mag) on LRS2-B and 2-4 VIRUS IFUs/amps. This can be done in grey time immediately before/after HETDEX observations.

There are 6 stars from our SPC catalog which are suitable for both VIRUS and LRS2, and those have been submitted as p1 ENG targets.

For each star, there are two sequences:

*"A" sequence (going from LRS2-B, to 046RL, to 046LL)

*"B" sequence (going from LRS2-B, to 047RL, to 047LL)

For example, the SPC star SA_95-42 has an "A" sequence with object names: VLSPC_SA9542A_B, VLSPC_SA9542A_046RL, and VLSPC_SA9542A_046LL.

The necessary offset commands for each setup are given on the following page, when possible: NightOperations/SciencePlans/20190201

Some targets do not have suitable stars for all three positions. In those cases, do the setup on LRS2-B separately from the setup on the LL/RL amplifiers.

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The plan:

• Observe one "A" sequence and one "B" sequence per night (these can count as nightly VIRUS SPC as well).

• Once one of each is obtained, do not observe additional standards that night, although you can observe the faintVL engineering targets.

• Try to observe them as close in time to HETDEX as possible (i.e., before or after; do not use dark time!).

• You will need to run "target_setup <id> <az> -to" of the first target in each group to send the fake ACAM image to the TO for setup.

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Other old tests for later possibly:

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Testing the Guider drag in the South

Once we are sure that the guider orientations are correct then we can try a trajectory at Az 180 and DEC -8:30 to see if while guiding on GC2 the System moves off.

Procedure:

• Pick a 14th mag star with DEC -8:30 near the start of the track to put on the IHMP
• use the i filters
• Setup on the field and get guider guiders and WFS centered.
• Handshake from the ACAM to the GC2.
• Start saving image of TT, WFS1, WFS2, GC1, GC2 and ACAM.
• Look for relative motion on GC1, ACAM, WFS1 and WFS2 for the next 40 minutes.
• note results in the log

If you get no drift at all please do the following:

• setup on target_setup 1739 E
• TO should setup with GC2
• Save images of TT, WFS1, WFS2, GC1, GC2 and ACAM for 40 minutes

Dither test

We have some new code in place to run the fiducial offsets and want to make sure it works well with the dithers. Please only run this test if the guider orientation test is completed and successful.

Procedure:

• Setup on a 14th mag star in the IHMP
• Use the g filters
• Setup like a VIRUS target
• Run a VIRUS dithered observation for at least 4 minutes per exposure (try to stay away from the moon)
• Make sure that GC1 and GC2 images are being saved during the observation.
• Report that the test is complete to Jason and Matthew