Changes between Version 3 and Version 4 of NightOperations/SciencePlans/20191016


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Timestamp:
Oct 16, 2019 4:50:04 PM (5 years ago)
Author:
stevenj
Comment:

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  • NightOperations/SciencePlans/20191016

    v3 v4  
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    59 === ENG19-2-004:  Contemporaneous LRS2-B and VIRUS SPC observations of '''faint''' stars ===
     59=== ENG19-3-002: '''faintBR_*''' LRS2-B + LRS2-R observations of faint SPC stars ===
    6060
    61 '''This is for grey or dark time only.'''
     61These can be observed in a variety of sky conditions.
    6262
    63 LRS2 is well-calibrated but VIRUS sometimes shows wavelength-dependent slopes/gradients -- the goal is to cross-calibrate VIRUS with LRS2-B.
    64 
    65 '''This program requires most clear conditions.'''
    66 
    67 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.
    68 
    69 The goal is to get at least one of these each clear night.
    70 
    71 You can find the trajectory offsets on mcs in /home/mcs/astronomer/VLSPC_jumps/
    72 
    73 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.
     63These are a new (as of April 2019) set of faint SPC stars (WDs) which will be observed on LRS2-B and LRS2-R. Each star needs only one visit - the faintest ones are especially important.
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     66=== ENG19-3-004: P1 '''VLSPC_*''' Contemporaneous LRS2-B and VIRUS SPC observations of '''bright''' stars ===
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     68One group of these should be observed each night, can be taken in a variety of sky conditions (NOT in dark time).
    7769
    78 === ENG19-2-004:  Contemporaneous LRS2-B and VIRUS SPC observations of '''bright''' stars ===
    79 
    80 
    81 '''This is for grey or dark time only.'''
    82 
    83 LRS2 is well-calibrated but VIRUS sometimes shows wavelength-dependent slopes/gradients -- the goal is to cross-calibrate VIRUS with LRS2-B.
    84 
    85 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.
    86 
    87 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.
    88 
    89 For each star, there are two sequences:
     70LRS2 is well-calibrated but VIRUS sometimes shows wavelength-dependent slopes/gradients -- the goal is to cross-calibrate VIRUS with LRS2-B. We want observations of stars from our usual SPC catalogs to be taken on LRS2-B and on two VIRUS IFUs/amps. When HETDEX fields are being observed, it would be great to acquire these data immediately before/after if possible. There are 6 stars from our SPC catalog which are suitable for both VIRUS and LRS2, and on each star there are two sequences:
    9071
    9172*"A" sequence (going from LRS2-B, to 046RL, to 046LL)
    … …  
    9576For example, the SPC star SA_95-42 has an "A" sequence with object names: VLSPC_SA9542A_B, VLSPC_SA9542A_046RL, and VLSPC_SA9542A_046LL.
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     78The necessary offset commands for each setup are given in /home/mcs/astronomer/VLSPC_jumps/  when possible. Note that the observation of the SPC on a VIRUS IFU can count as that night's VIRUS SPC.
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    98 The necessary offset commands for each setup are given on the following page, when possible: [wiki:NightOperations/SciencePlans/20190201]
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    100 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.
    10181
    102 *
     82=== ENG19-3-004:  '''faintVL_*''' Contemporaneous LRS2-B and VIRUS SPC observations of '''faint''' stars ===
    10383
    104 The plan:
     84These should be observed during clear sky conditions on a night which includes HETDEX observations (NOT in dark time).
    10585
    106 * Observe one "A" sequence and one "B" sequence per night (these can count as nightly VIRUS SPC as well).
     86Same premise as the VLSPC_* targets, but with fainter stars and HETDEX-length exposures on VIRUS. Here we observe the star on LRS2-B and then only a single VIRUS unit, in two patterns:
    10787
    108 * Once one of each is obtained, do not observe additional standards that night, although you can observe the faintVL engineering targets.
     88*"A" sequence (going from LRS2-B, to 046)
    10989
    110 * Try to observe them as close in time to HETDEX as possible (i.e., before or after; do not use dark time!).
     90*"B" sequence (going from LRS2-B, to 047)
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    112 * 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.
     92
     93The necessary offset commands for each setup are given in /home/mcs/astronomer/VLSPC_jumps/  when possible. Note that the observation of the SPC on a VIRUS IFU do NOT count as that night's VIRUS SPC.
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    114104.