Variable Faint Optical Sources Discovered by Comparing the POSS and SDSS Catalogs
Variable Faint Optical Sources Discovered by Comparing the POSS and SDSS Catalogs
We present a study of variable faint optical sources discovered by comparing the Sloan Digital Sky Survey (SDSS) and the Palomar Observatory Sky Survey (POSS) catalogs. We use SDSS measurements to photometrically recalibrate several publicly available POSS catalogs (USNO-A2.0, USNO-B1.0, DPOSS [the Digitized Second Palomar Observatory Sky Survey], and GSC2.2 …