Access to Astronomical Catalogues

← Click to display the menu
B/gcvs              General Catalogue of Variable Stars   (Samus+ 2007-2013)

General Catalog of Variable Stars (GCVS database, Version 2012Apr) Samus N.N., Durlevich O.V., et al. <Institute of Astronomy of Russian Academy of Sciences and Sternberg State Astronomical Institute of the Moscow State University > =2009yCat....102025S
ADC_Keywords: Stars, variable; Combined data; Description: The GCVS is the only reference source on all known variable stars. This version contains the electronically-readable version as distributed by the Sternberg Astronomical Institute and Institute of Astronomy (Russian Acad.Sci.), Moscow. It includes the catalog of variable stars, updated and completed with the Name-Lists of Variables Stars Nos. 67-79, the NSV (New catalog of Suspected Variable stars) and Supplement to the NSV stars, and a catalog of extragalactic variables. A cross-index makes possible to find out identifications between the GCVS and the NSV catalogue. Introduction: The present improved electronic version of the GCVS4 Volumes I-V, combined with Name-Lists of Variable Stars Nos.67-79 and NSV catalogue and supplement is also available from Sternberg Institute of Moscow University, or http://www.sai.msu.su/gcvs/gcvs/ gcvs_cat.dat is the combined computer-readable version of the GCVS4.2 Vols. I-III (Kholopov et al. 1985-1988) and Name-Lists of Variable Stars Nos.67-79 published in the system introduced during the preparation of the 4th GCVS edition; the stars are arranged in the order of their names inside constellations. The total number of designated variable stars has now reached 41638. Errors detected in the printed Volumes I-III and in the Name-Lists were corrected; the file includes also improved positional information, light elements, classifications etc. crossid.dat corresponds to Vol. IV of the GCVS4, and contains all variables, including extragalactic variables, stars from the Name-Lists, and stars suspected of variability since the compilation of the NSV catalog and its supplement. The authors tried to provide as complete lists as possible for the stars identified with the catalogues HD, BD, CoD, CPD, BS, ADS and for the stars with preliminary HV (Harvard Variable) designations; a list of the catalogues mentioned is included in the file "abbrev.txt". The final, Volume V (extragalactic variable stars) contains 10979 variable stars in 35 stellar systems (including the Magellanic Clouds, the large galaxies in Andromeda and Triangulum, etc., see evs*.dat). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file gcvs_cat.dat 174 47969 The GCVS Catalog (Vol. I-III, version 2013-04-30) gcvs_rem.dat 94 14165 Remarks on GCVS stars vartype.txt 121 1037 Description of GCVS Variability Types constel.txt 72 32 Numerical Codes for Constellations and Letters crossid.dat 48 192612 Cross-identifications (Vol. IV) abbrev.txt 77 256 Abbreviations of catalogues used in crossid.dat nsv_cat.dat 132 26017 The Suspected Variable stars and Supplement (2011) nsv_rem.dat 80 10768 Remarks on NSV (and Supplement) stars evs_cat.dat 160 10979 Extragalactic Variable Stars. Catalogue (Vol. V) evs_rem.dat 80 1936 Extragalactic Variable Stars. Remarks refs.dat 80 22805 References for all variables (GCVS, NSV, EVS) ref_abbr.txt 264 318 Abbreviations used for references
See also: http://www.sai.msu.su/gcvs/gcvs/ : the GCVS Group Home Page B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-2008) II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004) Byte-by-byte Description of file: gcvs_cat.dat
Bytes Format Units Label Explanations
1- 6 I06 --- VarNum Numeric designation, made from constellation and star names (codes in file "constel.txt") 7 A1 --- m_VarNum Component identification (1) 9- 18 A10 --- GCVS Variable star designation (G1) 19 A1 --- n_GCVS [*] indicates a remark in "gcvs_rem.dat" file 21- 22 I2 h RAh ? Hours RA, equinox J2000.0 (2) 23- 24 I2 min RAm ? Minutes RA, equinox J2000.0 (2) 25- 28 F4.1 s RAs ? Seconds RA, equinox J2000.0 (2) 29 A1 --- DE- ? Sign Dec, equinox J2000.0 (2) 30- 31 I2 deg DEd ? Degrees Dec, equinox J2000.0 (2) 32- 33 I2 arcmin DEm ? Minutes Dec, equinox J2000.0 (2) 34- 35 I2 arcsec DEs ? Seconds Dec, equinox J2000.0 (2) 36 A1 --- u_DEs [:*] position accuracy flags (3) 38- 47 A10 --- VarType Type of variability (see file "vartype.txt") 49 A1 --- l_magMax [<>(] Limit or amplitude symbol on magMax (G3) 50- 55 F6.3 mag magMax ? Magnitude at maximum brightness 56 A1 --- u_magMax Uncertainty flag (:) on magMax 57 A1 --- --- [)] ")" if magMax is an amplitude 59 A1 --- l_Min1 [<(] Limit or amplitude symbol on Min1 (G3) 60- 65 F6.3 mag Min1 ? Minimum magnitude or amplitude 66 A1 --- u_Min1 Uncertainty flag (:) on Min1 67- 68 A2 --- n_Min1 Alternative photometric system for Min1 (G4) 69 A1 --- --- [)] ")" if Min1 is an amplitude 71 A1 --- l_Min2 [<(] Limit or amplitude symbol on Min2 (G3) 72- 77 F6.3 mag Min2 ? Secondary minimum magnitude or amplitude 78 A1 --- u_Min2 Uncertainty flag (:) on Min2 79- 80 A2 --- n_Min2 Alternative photometric system for Min2 (G4) 81 A1 --- --- [)] ")" if Min2 is an amplitude 83- 84 A2 --- flt The photometric system for magnitudes (G4) 86- 98 F13.5 d Epoch ? Epoch for maximum light, Julian days (G5) 99 A1 --- u_Epoch [:±] Uncertainty flag on Epoch (4) 101-104 A4 --- Year Year of outburst for nova or supernova 105 A1 --- u_Year [:] Uncertainty flag on Year of outburst 107 A1 --- l_Period [<>(] Code for upper or lower limits (5) 108-123 F16.10 d Period ? Period of the variable star 124-126 A3 --- u_Period [*/N)2: ] Uncertainties on Period (6) 128-129 I2 % M-m/D ? Rising time or duration of eclipse (G6) 130 A1 --- u_M-m/D Uncertainty flag (:) on M-m/D 131 A1 --- n_M-m/D [*] Note for eclipsing variable (G6) 134-150 A17 --- SpType MK Spectral type 152-156 A5 --- Ref1 Reference to a study of the star (G7) 158-162 A5 --- Ref2 Reference to a chart or photograph (G7) 164 A1 --- f_GCVS [=N+] "N" if the star does not exist (7) 165-174 A10 --- VarName Alternative name of the variable (G8)
Note (1): designations of components of double/multiple stars : A,B; 1,2,3 ... (tau 1). Usually only one component of the binary is variable, but there exist two cases (CE Cas A,B; EQ Peg A,B) when both components are variable and enter the catalogue as separate lines. Note (2): the position is not listed when the variable is equivalent to another catalogued variable (see column VarName) Note (3): the asterisk (*) means that the coordinates that could not be improved were recalculated from old rough coordinates to the equinox J2000.0 with allowance for precession. Note (4): the following codes are used: ":" are used if the epoch is uncertain; "+" epoch may be later than that reported; "-" epoch may be earlier than that reported. Note (5): ">" or "<" if period is a lower or upper limit, respectively. "(" indicates that the period is the mean cycle time of a U Gem or recurrent nova (a closing bracket exists in u_Period) Note (6): the codes are: "*N" if the period may be a multiple of the quoted value; "/N" if the period may be a fraction of the quoted value; ")" closing bracket of l_Period for U Gem-type or recurrent novae. Note (7): Besides "N", the codes are: "=" if the star is also known under another variable name "+" if the star is in other catalogues (e.g. Hipparcos or Name Lists)
Byte-by-byte Description of file: gcvs_rem.dat
Bytes Format Units Label Explanations
1- 10 A10 --- GCVS Variable star designation 14- 94 A81 --- Text Text of note.
Byte-by-byte Description of file: crossid.dat
Bytes Format Units Label Explanations
1- 30 A30 --- Name Alternative name (catalog or list acronym is detailed in the file "abbrev.txt") 33 A1 --- --- [=] 34- 46 A13 --- VarName Designation in GCVS or NSV (G8) 48 A1 --- u_VarName [:?] Flag for doubtful identifications
Byte-by-byte Description of file: nsv_cat.dat
Bytes Format Units Label Explanations
1- 5 I05 --- NSV NSV number (above 15000 for the Supplement) 6 A1 --- m_NSV NSV letter suffix (1) 7 A1 --- u_NSV [-] Dubitancy flag if a star's variability seems doubtful or erroneous to the compilers 8 A1 --- n_NSV [*] indicate a remark in file "nsv.rem.dat" 10- 11 I2 h RA1950h ? Hours RA, equinox B1950.0 (2) 12- 13 I2 min RA1950m ? Minutes RA, equinox B1950.0 (2) 14- 17 F4.1 s RA1950s ? Seconds RA, equinox B1950.0 (2) 18 A1 --- DE1950- ? Sign Dec, equinox B1950.0 (2) 19- 20 I2 deg DE1950d ? Degrees Dec, equinox B1950.0 (2) 21- 22 I2 arcmin DE1950m ? Minutes Dec, equinox B1950.0 (2) 23- 24 I2 arcsec DE1950s ? Seconds Dec, equinox B1950.0 (2) 25 A1 --- u_DE1950s [:*] accuracy flags (G2) 27- 28 I2 h RAh ? Hours RA, equinox J2000.0 (2) 29- 30 I2 min RAm ? Minutes RA, equinox J2000.0 (2) 31- 34 F4.1 s RAs ? Seconds RA, equinox J2000.0 (2) 35 A1 --- DE- ? Sign Dec, equinox J2000.0 (2) 36- 37 I2 deg DEd ? Degrees Dec, equinox J2000.0 (2) 38- 39 I2 arcmin DEm ? Minutes Dec, equinox J2000.0 (2) 40- 41 I2 arcsec DEs ? Seconds Dec, equinox J2000.0 (2) 42 A1 --- u_DEs [:*] accuracy flags (G2) 44- 49 A6 --- VarType Type of variability (see file "vartype.txt") 51 A1 --- l_magMax [><(] Limit or amplitude symbol on magMax (G3) 52- 56 F5.2 mag magMax ? Magnitude at maximum brightness (3) 57 A1 --- u_magMax [:] Uncertainty flag on magMax 59 A1 --- f_magMin [(] indicates that magMin is an amplitude 60 A1 --- l_magMin [><] Limit symbol on magMin (G3) 61- 66 F6.3 mag magMin ? Minimum magnitude or amplitude (3) 67 A1 --- u_magMin [st:*] Uncertainty or steps on magMin (4) 68 A1 --- n_magMin Photometric system for magMin (G4) 69 A1 --- --- [)] ")" if magMin is an amplitude 71- 72 A2 --- flt Photometric system for magnitudes (G4) 74- 78 A5 --- Ref1 Reference to a study of the star (G7) 80- 84 A5 --- Ref2 Chart reference (G7) 86-100 A15 --- Desig Designation in paper referenced by Ref1 (5) 102-117 A16 --- SpType Spectral type (6) 118 A1 --- f_NSV [=|] '=' for named variables. 119-132 A14 --- VarName Designation in GCVS (G8)
Note (1): The letter "A" is present for one star, NSV 10360A, which is a completely different object from NSV 10360. Note (2): The position is not listed when the variable is equivalent to a GCVS star (see column VarName). Note (3): Magnitudes are reported to hundredths if the observations are photoelectric, to tenths or whole magnitudes if they are not. If only an amplitude has been measured photoelectrically, then the maximum magnitude is generally given to tenths only and the minimum is reported to hundredths. Note (4): "st" indicates that a light amplitude is reported for the minimum and is given in steps (instrumental measure). Note (5): (empty in the NSV Supplement part): identification of the suspected variable in the paper referenced in Ref1. DM numbers are given without prefix, the standard naming convention of "The Henry Draper Catalogue" being used (BD for zones +89 to -22; CD for -23 to -51; CP for -52 to -89). Identifications are sometimes made of coordinates, a 6-digit number consisting of hours, minutes, and seconds (or tenths of a minute) of time and degrees of declination with sign included. An asterisk (*) signifies that a designation is given in the remarks to the published catalog. Note (6): HD spectral types are generally in brackets, e.g. (A0). Some special symbols are used: AF for A-F stars FG for F-G stars KM for K-M stars
Byte-by-byte Description of file: nsv_rem.dat
Bytes Format Units Label Explanations
1- 5 I05 --- NSV NSV number (above 15000 for the Supplement) 6- 80 A75 --- Text Text of remark
Byte-by-byte Description of file: evs_cat.dat
Bytes Format Units Label Explanations
1- 7 I07 --- VarNum [890001/1230042] Variable number (1) 9- 20 A12 --- Name Variable star designation (3) 21 A1 --- n_Name [*] indicates a remark in file evs_rem.dat 22- 23 I2 h RAh Right ascension, equinox B1950.0 24- 25 I2 min RAm (minutes) 26- 30 F5.2 s RAs (seconds) 31 A1 --- DE- sign of declination, B1950.0 32- 33 I2 deg DEd Declination, equinox B1950.0 34- 35 I2 arcmin DEm (arc minutes) 36- 39 F4.1 arcsec DEs (arc seconds) 40 A1 --- u_DEs [":*!] accuracy flags on position (G2) 41- 48 A8 --- VarType Type of variability (see file "vartype.txt") 49- 53 F5.2 mag magMax ? Magnitude at maximum brightness 54 A1 --- u_magMax Uncertainty flag (:) on magMax 55 A1 --- l_magMin [<(] Limit or amplitude symbol on magMax (G3) 56- 61 F6.3 mag magMin ? Magnitude at minimum brightness or amplitude 62 A1 --- u_magMin Uncertainty flag (:) on magMin 63 A1 --- --- [)] ")" if magMin is an amplitude 64 A1 --- flt The photometric system for magnitudes (G4) 65- 78 F14.6 d Epoch ? Epoch for maximum light, Julian days (G5) 79 A1 --- u_Epoch Uncertainty flag on Epoch 80 A1 --- l_P [(] if mean cycle time of U Gem-type variable 81- 93 F13.8 d P ? Period (mean for U Gem-type) 94 A1 --- u_P Uncertainty flag (:) on P 95 A1 --- --- [)] for U Gem-type variable 96- 97 I2 % M-m/D ? Rising time or duration of eclipse (G6) 98 A1 --- u_M-m/D Uncertainty flag (:) on M-m/D 99 A1 --- n_M-m/D [*] Note for eclipsing variable (G6) 100-105 A6 --- SpType Spectral type (4) 107-111 A5 --- Ref1 Reference for study of the star (G7) 112-116 A5 --- Ref2 Reference for chart or photograph (G7) 118-131 A14 --- Desig1 designation in paper Ref1 132-143 A12 --- Desig2 designation in paper Ref2 144-152 A9 --- VarName Designation in GCVS (G8) 154-155 A2 --- Mm [n: ] Non-member note (5) 156-159 I4 yr Year ? Year of outburst for novae or supernovae 160 A1 --- u_Year [:] Uncertainty flag on YearNova
Note (1): Number of the variable star. This numbering system is made of a 3-digit number identifying the galaxy, followed by a 4-digit number identifying the variable in the galaxy. The numbering system for galaxies begins with 089, the first 88 codes being reserved for constellations (cf. column "VarNum" in file "gcvs_cat.dat") If in the literature for the considered galaxy there exist several different variable star numbering systems, we have introduced new numbers in the order of increasing right ascension for the equinox 1950.0. But if the variable star numbering system for the galaxy is practically of general use, we have retained it - if necessary, with additional numbers ordered by increasing right ascension. Note (3): Variable star Designation. The name of the variable in the adopted system of variable star designations: name of the galaxy + "V" + variable star No. within the galaxy (see column VarNo) Note (4): If there exist several spectral type determinations for a star, we preferred more recent ones, taking into account reliability of each determination. We converted symbols "d" (dwarfs) and "g" (giants) into luminosity classes V and III. If a nova showed spectral features typical of novae during or after the outburst, a symbol (NOVA) is given in this column. If the spectrum shows features characteristic of U Gem variables, this column contains the symbol (UG). Continuous spectrum is designated "cont", the symbol "e" means emission spectrum, lower case letters "ea", "eb" in this column stand for "e alpha", "e beta". For RR Lyrae stars, spectral types from hydrogen lines are given. A plus sign (+) between two spectral type values means that spectra of two components of a spectroscopic binary are observed. Two spectral type values separated with a minus sign (-) mean the range of spectral type variations in the process of brightness changes. Note (5): Symbols "n" or "n:" for "nonmembers" or "possible nonmembers" of the galaxy in question. For the stars that enter the GCVS vols. I-III (file gcvs_cat.dat) or the NSV catalogue (file "nsv_cat.dat") and are not members of the corresponding galaxy, the present volume gives only the running number, coordinates, the symbol "n", and the GCVS or NSV name.
Byte-by-byte Description of file: evs_rem.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Name Variable star designation 14- 80 A67 --- Text Text of remark
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Ref Reference number (G7) 7- 80 A74 --- Text Text of reference
Global Notes: Note (G1): Designation of Variable stars (GCVS Name). Traditional transliterations of Greek letters are used. Lower- and upper-case latin letters must be distinguished (e.g. u Her and U Her). See also the file "constel.txt" which gives details about GCVS names and conversion to numeric values. Note (G2): Accuracy of positions use the following symbols: " = right ascensions accurate to one second of time and declinations accurate to one arcsecond; : = right ascensions accurate to one second of time and declinations accurate to one tenth of an arcminute; * = declinations accurate to one arcminute. ' = right ascensions accurate to one minute of time and declinations accurate to one arcminute. ! = indicates that the listed coordinates refer to the galaxy's center since the coordinates of the star itself are unknown (concerns V0474 in the Sculptor system) Note (G3): The symbols are: ">" to indicate a faint limit "<" to indicate a bright limit "(" to indicate a that the value represents an amplitude Note (G4): Code for photometric system. The main codes are p (photographic magnitudes) and V (visual, photovisual, or Johnson's V). Several stars from the 68th Name-List have in these positions "1." designating the 1.04 µm band of the system introduced by G.W.Lockwood. The designations u,v,b,y refer to the Stroemgren system. The symbols "Ic" and "Rc" mean magnitudes in Cousins' I system. "g" designates magnitudes in the system of Thuan and Gunn; "T" stands for broad-band Tycho magnitudes formed from B and V measurements; "r" are red magnitudes not tied to a particular system. An asterisk in the corresponding position means a measurement in white light. Note (G5): Epochs are given for minimum light for all eclipsing and ellipsoidal variables, as well as for RV Tau and RS CVn types, and for maximum for all other types. This rule may occasionally be broken as explained only in the remarks to the catalog. Note (G6): (M-m) or (D) values help to define the shape of the light curve, expressed as a percentage of the period of the variable: -- duration of the eclipse (D) for eclipsing binaries; -- duration of the rising time (m-M) for intrinsic variables. An asterisk (*) in the column "n_M-m/D" means, for an eclipsing variable, that the duration of the constant brightness phase in minimum (d) for this star is equal to zero. A colon (:) denotes a poor precision. Note (G7): All references are detailed in the file "refs.dat". Numeric references are from Vol. I of GCVS (range 00002-09148), Vol. II (range 09149-09558), Vol. III (range 09559-10200), or from the Name-Lists (range 67001-77229). References from Vol. V (extragalactic variables) start by the letter "V", and references to the Suspected variables start by "n" (first part) or "s" (supplement). References may also be abbreviation to catalogues (BD, CPD, CoD, GSC, HIP, USNO). Note (G8): an alternative name may contain: * a GCVS name (file "gcvs_dat.dat") * a "Name-list" number if it starts by the two-digit number 67 to 77, and is followed by the four-digit number of the star in the corresponding Name-list. * the designation of an extragalactic variable (GCVS Vol. V, see file "evs_cat.dat"). The name may be followed by an asterisk (*) which means the presence of remarks in Vol. V.
History of the Catalogue: * February 1992: first version of GCVS 4.0 catalogue (Cat. II/214) * July 1996: Version 4.1 (Cat. II/214A) * 30-Jan-2004: Version 4.2 prepared by N.N. Samus [Moscow Inst. Astron.] and O.V. Durlevich [Sternberg] * 29-Dec-2004: Version 4.2 prepared at CDS, with merged NSV catalogues and references (Francois Ochsenbein [CDS], Cat. II/250) * 26-Jun-2007: Prepared as a regularly updated data-base (B/gcvs) from files at http://www.sai.msu.su/groups/cluster/gcvs/gcvs/ * 20-Dec-2008: Version 2008-Nov * 18-Jan-2009: Version 2009-Jan * 07-Jun-2009: Version 2009-Jun (41639 variables in gcvs_cat.dat) * 12-Jul-2009: Version 2009-Jul (corrections in nsv_cat.dat) * 13-Sep-2009: Version 2009-Sep (corrections in crossid.dat) * 27-Sep-2009: Version 2009-Sep (corrections in gcvs_cat.dat crossid.dat) * 22-Nov-2009: Version 2009-Sep (corrections in gcvs_cat.dat crossid.dat) * 31-Jan-2010: Version 2010-Jan (corrections in gcvs, crossid and nsv) * 25-Jul-2010: Version 2010-Jul (corrections in gcvs_cat, gcvs_rem and refs) * 26-Sep-2010: Version 2010-Sep (corrections in gcvs_cat, crossid, nsv_rem) * 31-Oct-2010: Version 2010-Sep (corrections in gcvs_cat, crossid) * 19-Dec-2010: Version 2010-Dec (corrections in crossid) * 23-Jan-2011: Version 2011-Jan (changes in remarks, references) * 23-Feb-2011: File "nsv_cat.dat" for NSV 11783: removed "1 3" in the "SpType" column (error communicated by Edward J. Sabol) * 20-Mar-2011: Version 2011-Mar (corrections in gcvs_cat, crossid, nsv) * 03-Apr-2011: Version 43675 variables * 15-Apr-2011: Version 2011-Apr (corrections in crossid) * 26-May-2011: Version 2011-May (corrections in crossid) * 17-Jul-2011: Version 2011-Jul (corrections in crossid + cat_nsv) * 15-Jan-2012: Version 2012-Jan (corrections in crossid + gcvs_rem) * 26-Feb-2012: Version 2012-Feb (45835 variables in gcvs_cat.dat) * 11-Mar-2012: Version 2012-Mar (additions & correction in crossid + gcvs_rem) * 15-Apr-2012: Minor changes in gcvs_cat.dat and crossid.dat * 30-Apr-2013: the "gcvs_cat.dat" file contains new columns with the secondary minimum characteristics. The catalog includes the Name List #80 part#3, for a total of 47969 variables (+2134)
(End) N.N. Samus [Moscow Inst. Astron.], Francois Ochsenbein [CDS] 18-Jan-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact