NOAO >   Observing Info >   Approved Programs >   2017B-0245

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Program Information for 2017B-0245


PI: J Allyn Smith, Austin Peay State U., smithj@apsu.edu
Address: Physics Department, 601 College St.; P.O. Box 4608, Clarksville, TN 37044 USA

CoI: Douglas Tucker, FNAL
CoI: Sahar Allam, FNAL
CoI: Deborah J Gulledge, Austin Peay State U.
CoI: William Wester, FNAL
CoI: Jacob M Robertson, Austin Peay State U.
CoI: Jamin Welch, Austin Peay State U.
CoI: John Marriner, FNAL

Title: Targeted Samples of the Hot Stellar Content in the Southern Sky

Abstract: This proposal is a continuation of our program to identify the hot stellar component -- in particular, pure-hydrogen-atmosphere (``DA'') white dwarfs -- in the Southern sky. These objects will be vital for the absolute color calibration of current and future Southern Sky CCD- based imaging surveys and facilities, such as the Dark Energy Survey (DES) and the Large Synoptic Survey Telescope. In our earliest runs, we primarily identified candidate hot stars by performing $u,g$-band imaging within the Blanco Cosmology Survey and PreCam Survey fields. Our current effort, which we plan to continue for 2017B, focuses on the following: (1) use the CTIO-0.9m telescope to obtain full $ugriz$ imaging for potentially hot WDs from the SuperCOSMOS survey (Rowell & Hambly, 2011) within the DES footprint; and (2) perform medium- resolution spectroscopy with the SOAR telescope to classify our candidates from our previous imaging runs, as well as candidates from other sources (e.g. the McCook & Sion WD Catalog and the SDSS DR-10 catalog), and determine their effective surface temperatures and surface gravities. In addition to providing calibration stars for future surveys and facilities, this data set will permit studies of the white dwarf luminosity function and of Galactic structure.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017B):  CT-0.9m/CFIM -- 11n on Nov 07 - Nov 17 2017
Run 2 (2017B):  SOAR/Goodman -- 5n on Aug 09 - Aug 10 2017, Oct 30 - Nov 01 2017
Run 3 (2017B):  SOAR/Goodman -- 2n on Jan 27 - Jan 28 2018


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