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DECam SV

DECam SV. Dara Norman NOAO . DECam Community Workshop. 18-19 Aug 2011. Goal of DECam SV. The goal of SV is to obtain scientifically useful data that both tests and highlights for the community the capabilities of the DECam instrument. DECam Community Workshop. 18-19 Aug 2011.

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DECam SV

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  1. DECam SV Dara Norman NOAO DECam Community Workshop 18-19 Aug 2011

  2. Goal of DECam SV • The goal of SV is to obtain scientifically useful data that both tests and highlights for the community the capabilities of the DECam instrument. DECam Community Workshop 18-19 Aug 2011 D. Norman

  3. Current Schedule for SV • Community and DES SV periods are separate • Plans for community SV are to have 2 one week long periods separated by one weeks. • Community SV is planned for the end of the 2012A semester (Aug). • Call for proposals to be done separately from normal proposal cycle. DECam Community Workshop 18-19 Aug 2011 D. Norman

  4. Selection of SV programs • The call for SV proposals will be less formal than the regular TAC process • Current plan is to have proposers submit a few paragraphs describing their scientific program and data requirements • Panel of commissioning team scientists will determine which proposals will be accepted based on criteria that include use in exercising the instrument and pipeline as well as scientific impact • Team will then work with accepted proposers to build an observing plan. DECam Community Workshop 18-19 Aug 2011 D. Norman

  5. SV programs • SV data is shared risk and may or may not be taken depending on other commissioning pressures • PIs of accepted programs that do receive data are expected to reduce and analyze data in a timely fashion (details to be determined in call) • PIs are expected to get analysis into the public domain as quickly as possible (details TBD) • SV data has no proprietary period DECam Community Workshop 18-19 Aug 2011 D. Norman

  6. Capabilities to be tested • A number of data requirements may be less important to the DES team than to general users with very different scientific requirements. • Below is a partial list of items that are anticipated to be included for testing as part of the community SV. • Additional input from YOU is requested and welcome! DECam Community Workshop 18-19 Aug 2011 D. Norman

  7. Capabilities to be tested • End to end test of quick reduction software • End to end test of DECam Community Pipeline • Saturation (bright targets), • Astrometry, • Precision photometry, PSF stability • (bright and faint) Nebulosity (flatfielding), • Mosaicking of large areas, (background matching) • Timing resolution (stability on multiple quick succession reads) • Short time exposures • Angular resolution for object removal (say background galaxies) • Non-sidereal tracking • Image quality (also for DES) DECam Community Workshop 18-19 Aug 2011 D. Norman

  8. Capabilities to be tested • May experiment with a couple different ways of taking same data. • Example: • Dome vs twilight vs dark sky flats for large regions of nebulosity • stacking of short exposures to produce deep photometric catalogs • difference imaging to check for high proper motion objects and solar system sources DECam Community Workshop 18-19 Aug 2011 D. Norman

  9. Example SV Program Imagining of star forming regions to test: • Large scale mosaicking • Background matching of nebular regions • Bright star saturation • Astrometry • Photometry • Reduction Pipelines REU program/NOAO/AURA/NSF DECam Community Workshop 18-19 Aug 2011 D. Norman

  10. Example SV Program Measure rotation periods for photometric standards from differential magnitudes in order to yield distance independent GYRO ages to test: • Precision photometry, e.g.,flux stability in time • Chip to chip differences in color transformation coefficients and zero points • Reduction Pipelines DECam Community Workshop 18-19 Aug 2011 D. Norman

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