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PTF Data Caveats and Cautionary Notes Mansi M. Kasliwal Carnegie Institution for Science California Institute of Technology Thanks to Richard Walters,

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Presentation on theme: "PTF Data Caveats and Cautionary Notes Mansi M. Kasliwal Carnegie Institution for Science California Institute of Technology Thanks to Richard Walters,"— Presentation transcript:

1 PTF Data Caveats and Cautionary Notes Mansi M. Kasliwal Carnegie Institution for Science California Institute of Technology Thanks to Richard Walters, our image quality specialist!

2 Saturated Star Trails: Fixed10/22/09 2

3 Fogging: Fixed 9/10/10 3

4 Shutter: Fixed 4

5 Ghosts 5

6 Bad Pixel Clumps 6 Please read documentation on PTF webpage for data release, specifically bit-encoded masks http://www.ptf.caltech.edu/page/calibration

7 Additional Cautionary Notes Wrong filter due to keyword being written in parallel Bias jump splitting CCD after camera restart Astrometric Solution Inaccuracy in crowded fields Catalog completeness Zeropoints are reliable only on photometric nights. Also, note zeropoint variation maps (Ofek et al. 2012) 7

8 Questions? Please don’t hesitate to contact us! http://www.ptf.caltech.edu/page/data_access Ofek et al. 2012, Laher et al. 2014 8

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