STIS Cycle-19 Calibration Phase-1 Last Revised: July 15, 2011 Proposal ID: 12743 Title: CCD Bias and Read Noise Monitor Part 1 PI: Justin Ely Co-I(s): Michael A. Wolfe --------------------------------------------------------------------------- # Orbit estimates are TOTAL for all of cycle-19; assume 26 weeks # 01 November 2011 to 30 April 2012 Total Prime Orbits: 0 External Parallel Orbits: 0 Internals or no-impact orbits: 182 Comments on orbit estimate: Orbits will occur once a day starting in November 2011 and ending in April 2012. --------------------------------------------------------------------------- # This section should be written with a GO audience in mind -- use # Calibration plans in WFPC-2 handbook as a guide. Purpose: Monitor the bias in the 1x1 bin settings at gain=1, and 1x1 at gain = 4, to build up high S/N superbiases and track the evolution of hot columns. Also GAIN=1 and GAIN=4, 1x1 biases through AMPS A and C to use in combination with biases taken through AMP D for monitoring of the read noise Description: Take fullframe bias exposures in the 1x1 bin settings at gain=1, and 1x1 at gain = 4. Take fullframe biases through AMPS A and C. All exposures are internals and fit in occultation orbits. Accuracy: superbias rms: 0.95 ADU at gain 1 1x1 and 1.13 ADU at gain 4 1x1, S/N > 1 Comments on Accuracy: superbias rms: 0.95 ADU at gain 1 1x1 and 1.13 ADU at gain 4 1x1, S/N > 1.0 Products: Weekly CDBS reference files (superbiases) and a summary in the end of cycle ISR --------------------------------------------------------------------------- # THE REST OF THIS FORM IS FOR INTERNAL USE --------------------------------------------------------------------------- # Target information (copy for each target) Target Name.............................: n/a (internal) RA.............................................: n/a Dec...........................................: n/a Flux (and units)........................: n/a Visibility window (if known or relevant): n/a Comment on choice of target: n/a # Table of exposures (copy for each exposure): Target or lamp..........................: BIAS Type of Acquisition.....................: Detector for observation................: STIS/CCD Operating mode .........................: Spectral Element........................: DEF Aperture................................: DEF Central Wavelength......................: Exposure Time...........................: 0s Number of Iterations ...................: 14 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=1, 1x1 Comments: Take exposure once a day Target or lamp..........................: BIAS Type of Acquisition.....................: Detector for observation................: STIS/CCD Operating mode .........................: Spectral Element........................: DEF Aperture................................: DEF Central Wavelength......................: Exposure Time...........................: 0s Number of Iterations ...................: 3 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, 1x1 Comments: Take exposure once a day. Target or lamp..........................: BIAS Type of Acquisition.....................: Detector for observation................: STIS/CCD Operating mode .........................: Spectral Element........................: DEF Aperture................................: DEF Central Wavelength......................: Exposure Time...........................: 0s Number of Iterations ...................: 2 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=1, AMPS A and C Comments: Take exposure four times a day. --------------------------------------------------------------------------- # Special needs of this proposal? Scheduling: Schedule once a day. Start on November 01, 2011. Prerequisites: n/a PDB update? no On-board table update? no # Special Requirements: Real time? N Special commanding? N Quick Data turnaround? N Special timing required? N Other? N Describe (& justify) special requirements: ------------------------------------------------------------------------- # Link to Cycle 19 Science Fraction of science programs supported by this calibration: 53% of STIS total exposure time. List categories of science which can't be executed until after this proposal: none why: List categories of science which are best performed contemporaneous with this proposal: none why: --------------------------------------------------------------------------- Expected FTE weeks for analysis: 2 Required turnaround on analysis (weeks): 2 Data volume (Mb needed for analysis): 10.5Mb Special software needed for analysis? (Describe): refbias, basejoin, weekbias, and refaver are needed for the creation of superbiases. Superbiases are automatically created with a pipeline. Description of analysis Plans: Retrieve biases and construct superbiases. These superbiases are compared to previous superbiases and the image ststistics are checked to see if there are any anomalous statistical deviations. Furthermore, acquisition of biases through AMPS A and C will allow the read noise monitor to be accomplished.