STIS Cycle-30 Calibration Phase-1 Template Last Revised: May 10, 2022 Proposal ID: (previously 16559 in Cycle 29) Title: MAMA Sensitivity and Focus Monitor PI: Svea Hernandez Co-I(s): --------------------------------------------------------------------------- # Orbit estimates are TOTAL for all of cycle-30; assume 53 weeks) Total Prime Orbits: 12 External Parallel Orbits: 0 Internals or no-impact orbits: 0 Comments on orbit estimate: --------------------------------------------------------------------------- # This section should be written with a GO audience in mind -- use # Calibration plans in WFPC-2 handbook as a guide. Purpose: Monitor sensitivity of each MAMA grating mode to detect any change due to contamination or other causes. Also monitor the STIS focus in a spectroscopic and an imaging mode. Description: Obtain exposures in each of the 2 low-resolution MAMA spectroscopic modes every 4 months, in each of the 2 medium-resolution modes once a year, and in each of the 4 echelle modes every 3 months, using unique calibration standards for each mode, and ratio the results to the first observations to monitor changes in sensitivity vs time. In addition, each L-mode sequence will be preceded by a CCD/F28X50OII image, two spectroscopic ACQ/PEAKs with the CCD/G230LB and crossed linear patterns, and two CCD/G230LB spectra, with the purpose of measuring the focus (PSF across the dispersion as a function of UV wavelength). Each M-mode sequence will be preceded by a CCD/F28X50OII direct image also to monitor the focus. The E-mode visits will obtain continuous parallel WFC3 imaging data to monitor focus on orbital timescales. Based on analyses of the Cycle 27, 28 and 29 programs, the focus monitor observations may be adjusted if necessary, but without an increase in orbits. Accuracy: Minimum S/N of 50 per resolution element at the wavelength of least sensitivity for L modes, and at the central wavelengths for M and E modes. 10% for focus changes, i.e FWHM of the profile across the dispersion. Comments on Accuracy: Products: Interim reports and ISR on sensitivity monitor. Updates to TDSTAB for pipeline corrections as needed. ISR on focus monitors. If the focus quality is found to degrade significantly, a separate program to characterize the degradation may be implemented. --------------------------------------------------------------------------- # Link to Cycle 30 Science # Use the GO + GTO Phase 1 exposure listing and derived statistics posted on WWW. Fraction of science programs supported by this calibration: 82.2% of total STIS exposure time in cycle 29. List categories of science which can't be executed until after this proposal: why: List categories of science which are best performed contemporaneous with this proposal: why: --------------------------------------------------------------------------- # THE REST OF THIS FORM IS FOR INTERNAL USE --------------------------------------------------------------------------- Observation summary: Observe GRW+70D5824 with L modes, AGK+81D266 with M modes, and BD+28D4211 with E modes. # Beginning in Cycle 26, the exposure times were adjusted for the first two # echelle observations (those occurring in orbit 1) to increase the counts in # the E140M observations. The remaining three observations (those occurring in # orbit 2) were rearranged to mitigate throughput losses that had been observed # in previous cycles. # # Beginning in Cycle 27, parallel WFC3 observations were taken during echelle # visits to obtain contemporaneous focus information. # Target information (copy for each target) Target Name.............................: GRW+70D5824 RA......................................: 13H 38M 51.77S (2000) Dec.....................................: +70D 17' 8.5" (2000) Flux (and units)........................: V=12.77, B-V=-0.09 Visibility window (if known or relevant): Constant Comment on choice of target: Permits access to the same standard throughout the year. For L modes and spectral focus monitor only. Target Name.............................: AGK+81D266 RA......................................: 9H 21M 19.06S (2000) Dec.....................................: +81D 43' 28.6" (2000) Flux (and units)........................: V=11.92, B-V=-0.33 Visibility window (if known or relevant): Constant Comment on choice of target: Permits access to the same standard throughout the year. For GM modes and focus image only. Target Name.............................: BD+28D4211 RA......................................: 21H 51M 11.07S (2000) Dec.....................................: +28D 51' 51.8" (2000) Flux (and units)........................: V=10.52, B-V=-0.34 Visibility window (if known or relevant): Solar Avoidance Feb.-Mar. Comment on choice of target: For all E modes. # Exposure list plan at the Phase I level. Be as complete as reasonable. # If possible information should be complete enough to allow easy # submission of a Phase 2 from this form. However, if you have to leave # some of the fields blank below, or want to provide the information # in another format, that is acceptable. (Make sure you do the BOP checking # though, as this is a phase-1 issue.) Table of exposures (copy for each exposure as appropriate/desired): L Modes: Observed 3 times a year: Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: ACQ Detector for observation................: CCD Operating mode .........................: ACQ Spectral Element........................: MIRROR Aperture................................: F28x50LP Central Wavelength......................: Exposure Time...........................: 3 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: GS ACQ SCENARIO BASE1B3 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: Detector for observation................: CCD Operating mode .........................: ACCUM Spectral Element........................: MIRROR Aperture................................: F28x50OII Central Wavelength......................: Exposure Time...........................: 110 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: GAIN=4, CR-SPLIT=2, SIZEAXIS2=128 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: ACQ Detector for observation................: CCD Operating mode .........................: ACQ/PEAK Spectral Element........................: MIRROR Aperture................................: 0.1x0.09 Central Wavelength......................: 2375 Exposure Time...........................: 2 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.ta.204050 Special Requirements or options.........: STEP-SIZE=75, NUM-POS=5, SEARCH=LINEARAXIS2 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: ACQ Detector for observation................: CCD Operating mode .........................: ACQ/PEAK Spectral Element........................: MIRROR Aperture................................: 0.1x0.09 Central Wavelength......................: 2375 Exposure Time...........................: 2 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.ta.204050 Special Requirements or options.........: STEP-SIZE=69, NUM-POS=5, SEARCH=LINEARAXIS1 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: Detector for observation................: CCD Operating mode .........................: ACCUM Spectral Element........................: G230LB Aperture................................: 0.1x0.09 Central Wavelength......................: 2375 Exposure Time...........................: 100 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: CR-SPLIT=2, SIZEAXIS2=64, WAVECAL=NO, GAIN=1 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: Detector for observation................: CCD Operating mode .........................: ACCUM Spectral Element........................: G230LB Aperture................................: 52x2 Central Wavelength......................: 2375 Exposure Time...........................: 86 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: CR-SPLIT=2, SIZEAXIS2=64, WAVECAL=NO, GAIN=1 Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: Detector for observation................: FUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: G140L Aperture................................: 52x2 Central Wavelength......................: 1425 Exposure Time...........................: 331 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995789 Special Requirements or options.........: Comment: Exposure time increased to maintain SNR=50 at wavelength of least sensitivity. Target or lamp..........................: GRW+70D5824 Type of Acquisition.....................: Detector for observation................: NUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: G230L Aperture................................: 52x2 Central Wavelength......................: 2376 Exposure Time...........................: 368 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: STIS.sp.995862 M Modes: Observed one time a year: Target or lamp..........................: AGK+81D266 Type of Acquisition.....................: ACQ Detector for observation................: Operating mode .........................: ACQ Spectral Element........................: MIRROR Aperture................................: F28x50LP Central Wavelength......................: Exposure Time...........................: 0.1 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: Target or lamp..........................: AGK+81D266 Type of Acquisition.....................: Detector for observation................: CCD Operating mode .........................: ACCUM Spectral Element........................: MIRROR Aperture................................: F28x50OII Central Wavelength......................: Exposure Time...........................: 90 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.im.204049 Special Requirements or options.........: GAIN=4, CR-SPLIT=2, SIZEAXIS2=256 Target or lamp..........................: AGK+81D266 Type of Acquisition.....................: Detector for observation................: FUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: G140M Aperture................................: 52x2 Central Wavelength......................: 1567 Exposure Time...........................: 380 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995863 Special Requirements or options.........: Comment: Exposure time increased to maintain SNR=50 at central wavelength Target or lamp..........................: AGK+81D266 Type of Acquisition.....................: Detector for observation................: FUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: G140M Aperture................................: 52x2 Central Wavelength......................: 1173 Exposure Time...........................: 204 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995864 Special Requirements or options.........: Target or lamp..........................: AGK+81D266 Type of Acquisition.....................: Detector for observation................: NUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: G230M Aperture................................: 52x2 Central Wavelength......................: 2818 Exposure Time...........................: 480 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995865 Special Requirements or options.........: Echelle Modes: Observed 4 times a year: Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: ACQ Detector for observation................: CCD Operating mode .........................: Spectral Element........................: MIRROR Aperture................................: F28x50LP Central Wavelength......................: Exposure Time...........................: 0.1 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: Special Requirements or options.........: STIS.ta.424118 Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: Detector for observation................: NUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: E230H Aperture................................: 0.2x0.2 Central Wavelength......................: 2263 Exposure Time...........................: 1432 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.1186000 Special Requirements or options.........: Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: Detector for observation................: FUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: E140M Aperture................................: 0.2x0.2 Central Wavelength......................: 1425 Exposure Time...........................: 646 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.1186002 Special Requirements or options.........: Target or lamp..........................: ANY Type of Acquisition.....................: Detector for observation................: WFC3/UVIS Operating mode .........................: ACCUM Spectral Element........................: F438W Aperture................................: UVIS2-2K4-SUB Central Wavelength......................: Exposure Time...........................: 205 Number of Iterations ...................: 6 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: WFC3UVIS.im.1443220 Special Requirements or options.........: Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: Detector for observation................: NUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: E230M Aperture................................: 0.2x0.2 Central Wavelength......................: 2707 Exposure Time...........................: 422 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995886 Special Requirements or options.........: Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: Detector for observation................: NUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: E230M Aperture................................: 0.2x0.2 Central Wavelength......................: 1978 Exposure Time...........................: 628 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995877 Special Requirements or options.........: Target or lamp..........................: BD+28D4211 Type of Acquisition.....................: Detector for observation................: FUV/MAMA Operating mode .........................: ACCUM Spectral Element........................: E140H Aperture................................: 0.2x0.2 Central Wavelength......................: 1416 Exposure Time...........................: 1034 Number of Iterations ...................: 1 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: STIS.sp.995878 Special Requirements or options.........: Target or lamp..........................: ANY Type of Acquisition.....................: Detector for observation................: WFC3/UVIS Operating mode .........................: ACCUM Spectral Element........................: F438W Aperture................................: UVIS2-2K4-SUB Central Wavelength......................: Exposure Time...........................: 205 Number of Iterations ...................: 7 BOP Predicted Local Count Rate for MAMA.: BOP Predicted Global Count Rate for MAMA: ETC PID IDs for Count Rates.............: WFC3UVIS.im.1443220 Special Requirements or options.........: --------------------------------------------------------------------------- # Special needs of this proposal? Scheduling: low-res modes every 4 months; med-res modes 2x per year; echelle modes every 3 months Prerequisites: PDB update? On-board table update? # Special Requirements: Real time? N Special commanding? Yes--Monthly MAMA offsets are to be canceled and centering returned to nominal for all exposures in this program. Quick Data turnaround? N Special timing required? N Other? N Describe (& justify) special requirements: Eliminate a spatial sensitivity variable to permit tracking of any small temporal variations. ------------------------------------------------------------------------- # Analysis Plan Expected FTE weeks for analysis: 3 for sensitivity analysis, 2 weeks for ISR, 3 for focus. Required turnaround on analysis (weeks): 4 for sensitivity, 4 for focus Data volume (Mb needed for analysis): 300 for sensitivity, 200 for focus Special software needed for analysis? (Describe): IRAF/IDL/Python scripts in place and under development. WFC3 team's scripts for PSF metrics. Description of analysis plans: (1) TDS - Prepare comparative plots relative to baseline within 4 weeks of each sensitivity observation set; prepare interim and final reports on the same. Develop wavelength-dependent analysis for pipeline corrections, and analyze cumulative echelle exposures. (2) STIS Focus - Reconstruct sampled PSF from ACQ/PEAK fluxes at dwell points and compare profiles with previous observations. (3) WFC3 Focus - Obtain phylogram PSF metrics using J. Anderson's wfc3uv_findfocus code and use empirical relations between the phylogram values and phase retrieval despace (ongoing work by L. Dressel) to obtain focus values for the WFC3 parallels.