II/272 Guide Star Photometric Catalog V2.4 (Bucciarelli+ 2001) ================================================================================ The Guide Star Photometric Catalog, Version 2.4 Bucciarelli et al. ================================================================================ ADC_Keywords: Photometry, sequences ; Photometry, UBV ; Bibliography Keywords: instrumentation: detectors ; methods: miscellaneous ; techniques: photometric ; catalogs ; surveys Abstract: We publish 1653 CCD photometric sequences in the Johnson-Kron-Cousins standard system, distributed both in the northern and southern hemispheres, useful for the calibration of photographic photometry of Schmidt survey plates. The collection and reduction of the CCD data presented here are part of a long-term program devoted to the construction of the Second Guide Star Photometric Catalog (GSPC-II). The GSPC-II is an all-sky catalog of photometric stellar sequences with a limiting magnitude of V=19 or fainter, in the (B), V, and R passbands of the Johnson-Kron-Cousins system. Standard photometric errors are at the level of ~ 0.07 for a V ~ 19 magnitude star. These sequences are being used by teams of the Space Telescope Science Institute (STScI) and the Osservatorio Astronomico of Torino (OATo) for the photometric calibration of the Second Guide Star Catalog. Description: The GSPC-II completes the Guide Star Photometric Catalog (Cat. II/143) with stars between 14-19th magnitude near the center of each of the Palomar and UKSTU survey fields. These were all observed using CCD detectors from a number of different observatories. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file gspc24.dat 134 554007 The Guide Star Photometric Catalog, Version 2.4 -------------------------------------------------------------------------------- See also: http://www-gsss.stsci.edu/Catalogs/GSPC/GSPC2/GSPC2.htm : GSPC2 Home Page II/143 : Guide Star Photometric Catalog, Updated Version 1 (Lasker+ 1988,1996) I/305 : The GSC2.3 Catalog (STScI, 2006) Byte-by-byte Description of file: gspc24.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- ID Object identifier (Field+Sequential Identifier) 11- 19 F9.5 deg RAdeg Right ascension J2000 21- 29 F9.5 deg DEdeg Declination J2000 31- 32 I2 --- o_Bmag Number of observations in B 35- 40 F6.3 mag Bmag ?=99.999 B magnitude from Aperture photometry 43- 48 F6.3 mag e_Bmag ?=99.999 Mean error on Bmag 51- 56 F6.3 mag Bmag1 ?=99.999 B magnitude from PSF fitting 59- 64 F6.3 mag e_Bmag1 ?=99.999 Mean error on Bmag1 66- 67 I2 --- o_Vmag Number of observations in V 70- 75 F6.3 mag Vmag ?=99.999 V magnitude from Aperture photometry 78- 83 F6.3 mag e_Vmag ?=99.999 Mean error on Vmag 86- 91 F6.3 mag Vmag1 ?=99.999 V magnitude from PSF fitting 94- 99 F6.3 mag e_Vmag1 ?=99.999 Mean error on Vmag1 101-102 I2 --- o_Rmag Number of observations in R 105-110 F6.3 mag Rmag ?=99.999 R magnitude from Aperture photometry 113-118 F6.3 mag e_Rmag ?=99.999 Mean error on Rmag 121-126 F6.3 mag Rmag1 ?=99.999 R magnitude from PSF fitting 129-134 F6.3 mag e_Rmag1 ?=99.999 Mean error on Rmag1 -------------------------------------------------------------------------------- ================================================================================ (End) Brian McLean [STSci], Francois Ochsenbein [CDS] 06-Nov-2006