/ftp/cats/ii/342



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II/342              Hubble Source Catalog (V1)                 (Whitmore+, 2016)
The following files can be converted to FITS (extension .fit or fit.gz)
	hsc1.sam
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=II/342
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drwxr-xr-x 351 cats archive 8192 Mar 25 10:13 [Up] drwxr-xr-x 4 cats archive 4096 Dec 19 18:53 [TAR file] -rw-r--r-- 1 cats archive 459 Dec 19 18:48 .message -r--r--r-- 1 cats archive 10977 Sep 25 2017 ReadMe -r--r--r-- 1 cats archive 11117 Oct 14 2016 ReadMe.v00 -rw-r--r-- 1 cats archive 7060 Dec 19 18:53 +footg5.png -rw-r--r-- 1 cats archive 17654 Dec 19 18:53 +footg8.png -rw-r--r-- 1 cats archive 366 Nov 14 2016 acknow.htx -rw-r--r-- 1 cats archive 397000 Oct 11 2016 hsc1.sam -rw-r--r-- 1 cats archive 397000 Oct 11 2016 hsc2.sam -rw-r--r-- 1 cats archive 41 Oct 13 2016 qboxes1 -rw-r--r-- 1 cats archive 41 Oct 13 2016 qboxes2 -rw-r--r-- 1 cats archive 135360 Aug 22 2022 tab_2342_1_II_342_hsc1.moc.fits -rw-r--r-- 1 cats archive 146880 Aug 22 2022 tab_2342_2_II_342_hsc2.moc.fits
Beginning of ReadMe : II/342 Hubble Source Catalog (V1 and V2) (Whitmore+, 2016) ================================================================================ Hubble Source Catalog. Whitmore B.C., Allam S.S., Budavari T., Casertano S., Downes R.A., Donaldson T., Fall S.M., Lubow S.H., Quick L., Strolger L.-G., Wallace G., White R.L. <Astron. J. 151, 134 (2016)> =2016AJ....151..134W =2016yCat.2342....0W ================================================================================ ADC_Keywords: Surveys ; Photometry, HST Keywords: astrometry - catalogs - techniques: photometric - virtual observatory tools Abstract: The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope (HST) by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive (HLA) into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160,000 HST exposures. Source lists from Data Release 8 of the HLA are matched using an algorithm developed by Budavari & Lubow (2012ApJ...761..188B). The mean photometric accuracy for the catalog as a whole is better than 0.10mag, with relative accuracy as good as 0.02mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10mas, with a value for the mode (i.e., most common value) of 2.3mas. The absolute astrometric accuracy is better than 0.1" for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. We provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog. Description: The HSC v1 contains members of the WFPC2, ACS/WFC, WFC3/UVIS and WFC3/IR Source Extractor source lists from HLA version DR8 (data release 8). The crossmatching process involves adjusting the relative astrometry of overlapping images so as to minimize positional offsets between closely aligned sources in different images. After correction, the astrometric residuals of crossmatched sources are significantly reduced, to typically less than 10mas. The relative astrometry is supported by using Pan-STARRS, SDSS, and 2MASS as the astrometric backbone for initial corrections. In addition, the catalog includes source nondetections. The crossmatching algorithms and the properties of the initial (Beta 0.1) catalog are described in Budavari & Lubow (2012ApJ...761..188B). The HSC v2 contains members of the WFPC2, ACS/WFC, WFC3/UVIS and WFC3/IR Source Extractor source lists from HLA version DR9.1 (data release 9.1). The crossmatching process involves adjusting the relative astrometry of overlapping images so as to minimize positional offsets between closely aligned sources in different images. After correction, the astrometric residuals of crossmatched sources are significantly reduced, to typically less than 10mas. The relative astrometry is supported by using Pan-STARRS, SDSS, and 2MASS as the astrometric backbone for initial corrections. In addition, the catalog includes source nondetections. The crossmatching algorithms and the properties of the initial (Beta 0.1) catalog are described in Budavari & Lubow (2012ApJ...761..188B). Hubble Source Catalog Acknowledgement: Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESAC/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA).