Using APASS and 2GSS for studying variable stars
1 American Association of Variable Star Observers, Cambridge, MA, USA
2 Lowell Observatory, Flagstaff, AZ, USA
3 McMaster University, Hamilton, ON, Canada
4 Southwest Research Institute, Boulder, CO, USA
5 Dark Ridge Observatory (DRO), Weed, NM, USA
Published online: 8 September 2017
The AAVSO Photometric All-Sky Survey (APASS) provides calibrated magnitudes in the range 7 < V < 17 for the entire sky, in the BVugriZsY bandpasses. While primarily designed for 0.02 mag calibration, it provides photometry over a many-year baseline, and also has near daily cadence in the standard field regions on the equator. Likewise, the Second Generation Synoptic Survey (2GSS) is a follow-on to APASS, and will provide daily cadence in two passbands for the entire sky.
© The Authors, published by EDP Sciences, 2017
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