Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.sao.ru/cats/doc/RASS_ID.html
Дата изменения: Wed Mar 18 12:25:11 2015 Дата индексирования: Sun Apr 10 02:01:41 2016 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п п п п п р п р п р п |
ftp.hs.uni-hamburg.de/pub/outgoing/rass-id A452 1998A&AS..127..145Bade+ The Hamburg/RASS Catalogue of optical CATS identifications (ftp.hs.uni-hamburg.de/pub/outgoing/rass-id 6/98) Comment: RADECJ, opt.class for ~15000 cands for 4665 RASS sources 2 Files: 205x79+152021x86 = 1.06 Mb ---------------------------------------------------------------------- | The Hamburg/RASS Catalogue of Optical Identifications | ---------------------------------------------------------------------- N. Bade (1), D. Engels (1), W. Voges (2), V. Beckmann (1), Th. Boller (2), L. Cordis (1), M. Dahlem (3), J. Englhauser (2), K. Molthagen (1), P. Nass (1,2), J. Studt (1), D. Reimers (1) (1) Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg (2) MPI fuer Extraterrestrische Physik, D-85740 Garching (3) ESTEC, Astrophysics Division, Postbus 299 ,NL-2200 AG Noordwijk Version 2.0, issued January 5, 1998 now 4665 positions, Version 1.1, issued December 5, 1996 additional entries in the X-ray rows (flags and date of last change) Version 1.0, issued November 1, 1996 ------------------------------------------------------------------------- GENERAL DESCRIPTION ------------------------------------------------------------------------- The file rass2id.cat provides information on optical identifications to X-ray positions of the ROSAT All-Sky Survey (RASS). The file was created by correlating the Bright Source Catalogue of ROSAT (Voges et al., 1996) and the Hamburg/RASS Catalogue of Optical Identifications (HRC) (Bade et al., 1996, in prep.). In the current state (Version 2.0) the catalogue contains 4665 positions in the extragalactic northern sky. For each X-ray position optical information taken from HQS objective prism and direct Schmidt plates (Hagen et al., 1995, A&AS 111, 195) is given and a finding chart derived from digitized direct plates as gzipped Postscript file is provided. If possible, the most likely optical counterpart is marked in the catalogue and on the finding chart. For many of the newly processed HQS fields of Version 2.0 no direct Schmidt plates from the HQS exists. In these cases we put finding charts generated from the STScI Digitized Sky Survey on the ftp server. We remind the reader that the STScI Digitized Sky Survey and HQS prism plates have different epochs. This has to be taken into account for stellar identifications. Furthermore the spectral sensitivity of the STScI Digitized Sky Survey and the HQS prism plates is different. --------------------------------------------------------------------------- CONTENTS --------------------------------------------------------------------------- X-RAY ROWS --------------------------------------------------------------------------- The rows containing the X-ray information can be recognized by 'RX' in the second and third column. They have the following structure: Bytes Format Units Explanations 1-16 A16 Object name 19-20 I2 R.A.: hours (2000.0) 22-23 I2 R.A.: minutes (2000.0) 25-28 F4.1 R.A.: seconds (2000.0) 31-33 I3 Decl.: degree (2000.0) 35-36 I2 Decl.: minutes (2000.0) 38-39 I2 Decl.: seconds (2000.0) 43-45 I3 arcseconds error radius derived from the BSC 51-56 I6 internal number 62-64 I3 identification code 69 I1 flag, if set to 1, identification changed since last catalogue version 70 I1 flag, if set to 1, entries to this X-ray position have changed since last catalogue version, 71 I1 flag, supplementary X-ray positions are flagged with 1 74-79 A6 date of last change The identification code is defined as follows: The first (and third) digit give(s) the classification: 1 AGN 2 Galaxy, derived from the morphology on the direct plates 3 Cluster 5 M dwarf 6 White Dwarf 7_1 K Dwarf 7_2 F or G star 7_3 Cataclysmic Variable (CV) 7_4 Bright Star (B < 13) 8 no plausible candidate found 803 one object in favourable position, but no spectral information 0 empty field on objective prism and direct plate within a radius of at least 40 arcsec The second digit in the identification code describes the reliability of the given identification: 0 'highly probable', the proposed counterpart fulfills all requirements of its class and no other plausible counterpart within the error radius of the X-ray source exists 1 'probable', the proposed counterpart fulfills the requirements of its class, but there are limitations. Either, the objective spectrum is not typical, or there are small conflicts with the X-ray information (spectral or spatial information, distance to the X-ray position) or there is another (considerably less) plausible counterpart in the error circle 2 'possible', the proposed counterpart fulfills some requirements of its class, but there are doubts arising from insufficient objective prism data, conflicting X-ray data or another plausible candidate FINDING CHARTS ------------------------------------------------------ The finding chart for each X-ray position is stored as a gzipped Postscript file and they can be found in the directories d-10 to d+80. These directories arrange the files into declination belts. Names of finding charts generated by the STScI Digitized Sky Survey begin with a 'p'. OPTICAL ROWS ------------------------------------------------------ Below the X-ray information rows with optical data about objects in the error circle follow. These lines have the following structure: Bytes Format Units Explanations 14-16 I3 Number, a '+' in front of the number marks the proposed optical counterpart 19-20 I2 R.A.: hours (2000.0) 22-23 I2 R.A.: minutes (2000.0) 25-28 F4.1 R.A.: seconds (2000.0) 31-33 I3 Decl.: degree (2000.0) 35-36 I2 Decl.: minutes (2000.0) 38-39 I2 Decl.: seconds (2000.0) 42-45 I4 arcseconds X-ray position - optical position in right ascension 48-51 I4 arcseconds X-ray position - optical position in declination 55-57 I3 arcseconds distance between X-ray and optical position 62-65 F4.1 Optical magnitude B a '<' on column 61 means upper limit for magnitude, the object is saturated '>19.0' in column 61-65 means, that the optical counterpart is only visible on the direct plate not on the prism plate(s) no entry means no B magnitude available 77-84 A8 Classification for objective prism spectrum For the classification of objective prism spectra the following scheme was adopted: SUBDWARF Hot Subdwarfs (sdO,sdB) W-DWARF White Dwarfs STAR-BA Balmer absorption lines, point-like image STAR-FG G-Band, Ca H+K, point-like image STAR-K G-Band, Ca H+K, redder continuum, point-like image STAR-M Very red, TiO lines, Ca I 4226, point-like image CV Cataclysmic variable, Balmer emission lines GALAXY Extended image on direct plate, no emission lines, red continuum AGN Emission line(s), blue continuum, weak extension on direct plate allowed BLUE GAL moderately blue continuum, extended image on direct plate QSO Emission line(s), extremely blue continuum, no extension on direct plate EBL-WK Extremely blue continuum, weak point-like object BLUE-WK Moderately blue continuum, weak point-like object RED-WK Red continuum, weak point-like object UNIDENT Classification open OVERLAP Classification not possible due to overlapping spectra SATURATE Classification not possible due to amplifier saturation The catalogue can be used for scientific purposes if the above mentioned paper is referenced. For more detailed information about the identification code and the classification scheme for objective prism spectra the catalogue user is also referred to this paper. Acknowledgements: The ROSAT project is supported by the Ministerium fuer Bildung, Wissenschaft, Forschung und Technologie (BMBF/DARA) and by the Max-Planck-Gesellschaft (MPG). This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This work has been funded by the Deutsche Forschungsgemeinschaft under Re 353/22-1 to 4 and by the BMBF under DARA 50\,0R\,96016. The STScI Digitized Sky Surveys were produced at the Space Telescope Science Institute under U.S. Government grant NAG W-2166. The images of these surveys are based on photographic data obtained using the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt Telescope. The plates were processed into the present compressed digital form with the permission of these institutions. The National Geographic Society - Palomar Observatory Sky Atlas (POSS-I) was made by the California Institute of Technology with grants from the National Geographic Society. ====================================================================== drwxrwxr-x 12 3014 750 1024 Sep 14 12:08 . drwxrwxr-x 32 root 750 1024 Mar 3 13:08 .. -rw-r--r-- 1 3014 750 10215 Aug 31 1999 README drwxr-xr-x 2 3014 750 28672 Aug 31 1999 d+00 drwxr-xr-x 2 3014 750 14336 Aug 31 1999 d+10 drwxr-xr-x 2 3014 750 23552 Aug 31 1999 d+20 drwxr-xr-x 2 3014 750 24576 Aug 31 1999 d+30 drwxr-xr-x 2 3014 750 18432 Aug 31 1999 d+40 drwxr-xr-x 2 3014 750 14336 Aug 31 1999 d+50 drwxr-xr-x 2 3014 750 8192 Aug 31 1999 d+60 drwxr-xr-x 2 3014 750 5120 Aug 31 1999 d+70 drwxr-xr-x 2 3014 750 1024 Aug 31 1999 d+80 drwxr-xr-x 2 3014 750 1024 Aug 31 1999 d-10 -rw-r--r-- 1 3014 750 997316 Aug 31 1999 rass2idv1_1.cat -rw-r--r-- 1 3014 750 64103 Aug 31 1999 rass2idv1_1_sky.ps.gz -rw-r--r-- 1 3014 750 1242801 Aug 31 1999 rass2idv2_0.cat