Improvement in the SDSS Photometric Calibration for Red Stars
Abstract
The SDSS has been an extremely fruitful survey for the study of late-type stars and other inherently red objects. Because of the breadth of the survey, it is important that all of the photometric data be calibrated on the standard SDSS 2.5m ugriz system. However, for stars redder than r-i > 0.6, the stellar locus measured with the SDSS 2.5m telescope begins to diverge from the SDSS photometric telescope calibration measurements using the presently derived color transformations. We use photometry of hundreds of late type stars that have been measured with both the SDSS 2.5m and the SDSS photometric telescope to obtain improved color transformations between the two telescopes for stars with red colors. These data will be particularly useful for calibrating an improved photometric parallax relation for low mass stars.
- Publication:
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American Astronomical Society Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AAS...209.9712D