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B/gcvs               General Catalogue of Variable Stars     (Samus+, 2007-2017)

General catalogue of variable stars: Version GCVS 5. Samus N.N., Kazarovets E.V., Durlevich O.V., Kireeva N.N., Pastukhova E.N. <Astron. Zh. 94, 87 (2017)> =2017ARep...61...80S =2017AZh....94...87S
ADC_Keywords: Stars, variable ; Combined data Abstract: Work aimed at compiling detailed catalogs of variable stars in the Galaxy, which has been carried out continuously by Moscow variable-star researchers since 1946 on behalf of the International Astronomical Union, has entered the stage of the publication of the 5th, completely electronic edition of the General Catalogue of Variable Stars (GCVS). This paper describes the requirements for the contents of the 5th edition and the current state of the catalog in its new version, GCVS 5.1. The complete revision of information for variable stars in the constellation Carina and the compilation of the 81st Name-list of Variable Stars are considered as examples of work on the 5th edition. The GCVS 5.1 is freely accessible on the Internet. We recommend the present paper as a unified reference to the 5th edition of the GCVS. 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. After the publication of Volume III of the 4th edition of the GCVS, the subsequent Name-lists with numbers from 67 to 77 contained only names of variable stars in the GCVS systems, together with their coordinates and variability types. We actually started compiling the 5th edition of the GCVS ten years ago, with the 78th Name-list of Variable Stars, which provided (as did all subsequent Name-lists) complete GCVS information for each star (in addition to the variability types, ranges of brightness variations, epochs of brightness maxima or minima, periods, etc.). In all, the 78th-81st Name-lists contain more than 13300 variable stars. The complete revision of information on the coordinates of variable stars (see Introduction) was also a part of the transition to the 5th edition. The pesent improved electronic version of the GCVS5, combined with Name-Lists of Variable Stars Nos. 67-81 and NSV catalogue and supplement is also available from Sternberg Institute of Moscow University, or http://www.sai.msu.su/gcvs/gcvs/ The GCVS 5.1 version contains data for 52011 individual variable objects discovered and named as variable stars by 2015 and located mainly in the Milky Way galaxy. Also, there are 158 objects that are non-existing, non-stellar, or stars erroneously named for the second time. The stars of the GCVS 5.1 are stars of the GCVS fourth edition plus Name-lists Nos. 67-81. The stars from the Name-lists Nos. 78-81 are presented in the complete GCVS format. Complete information for stars of the Name-lists Nos. 67-77 is so far provided in the first 18 constellations (Andromeda Cassiopeia). In these constellations, the GCVS information has been completely revised with active use of new publications as well as observations retrieved by the GCVS compilers by data mining and used to determine new variability types and new light elements whenever possible. We continue this work and will introduce new data for the next constellations as soon as they are ready. Upon recommendations of the IAU Commissions 27 and 42, in 2006, we developed a new experimental system of classification for variable stars. 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. 67-81 published in the system introduced during the preparation of the 5th GCVS edition; the stars are arranged in the order of their names inside constellations. The total number of designated variable stars has now reached 52011. 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. For 51606 variable stars, our version provides new equatorial J2000.0 coordinates (right ascensions to within 0.01s and declinations to within 0.1"), for 23934 stars with allowance for their proper motions. crossid.dat is the cross-identification tables of the General Catalogue of Variable Stars (GCVS) contain all GCVS (including variables from the Catalogue of Extragalactic Variable stars), NSV (New Catalogue of Suspected Variable stars) and Supplement to the NSV stars as well as stars from the name-lists of variable stars nos. 67 - 81; it also makes it possible to find out identifications between the GCVS and the NSV catalogue. 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 237 52011 GCVS catalog (GCVS 5.1, version March, 2017) gcvs_rem.dat 80 15800 GCVS remarks vartype.txt 121 1497 Description of GCVS Variability Types constel.txt 72 32 Numerical Codes for Constellations and Letters crossid.dat 48 204655 Cross-Identifications (Vol. V) abbrev.txt 77 256 Abbreviations of catalogues used in crossid.dat nsv_cat.dat 149 26018 NSV and supplement nsv_rem.dat 80 10830 NSV and NSVS remarks evs_cat.dat 160 10979 Extragalactic Variable Stars. Catalogue (Vol. V) evs_rem.dat 80 1936 Extragalactic Variable Stars. Remarks refs.dat 80 23743 References ref_abbr.txt 264 318 Abbreviations used for references
See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-2008) II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004) http://www.sai.msu.su/gcvs/gcvs/ : the GCVS Group Home Page ftp://zeus.sai.msu.ru/pub/groups/cluster/gcvs/gcvs/gcvs5 : GCVS5 Home Page 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 (2) 19 A1 --- n_GCVS [*] indicates a remark in "gcvs_rem.dat" file 21- 22 I2 h RAh ? Hours RA, equinox J2000.0 (G1) 23- 24 I2 min RAm ? Minutes RA, equinox J2000.0 (G1) 25- 29 F5.2 s RAs ? Seconds RA, equinox J2000.0 (G1) 31 A1 --- DE- Sign Dec, equinox J2000.0 (G1) 32- 33 I2 deg DEd ? Degrees Dec, equinox J2000.0 (G1) 34- 35 I2 arcmin DEm ? Minutes Dec, equinox J2000.0 (G1) 36- 39 F4.1 arcsec DEs ? Seconds Dec, equinox J2000.0 (G1) 40 A1 --- u_DEs [:] position accuracy flag (G2) 42- 51 A10 --- VarType Type of variability (see file "vartype.txt") 53 A1 --- l_magMax [<>(] Limit or amplitude symbol on magMax (G3) 54- 59 F6.3 mag magMax ? Magnitude at maximum brightness 60 A1 --- u_magMax Uncertainty flag (:) on magMax 63- 64 A2 --- l_Min1 [< (] Limit or amplitude symbol on Min1 (G3) 65- 70 F6.3 mag Min1 ? Minimum I magnitude or amplitude 71 A1 --- u_Min1 Uncertainty flag (:) on magMinI 72- 73 A2 --- n_Min1 Alternative photometric system for Min1 (G4) 74 A1 --- --- [)] ) if Min1 is an amplitude 76- 77 A2 --- l_Min2 [< (] Limit or amplitude symbol on Min2 (G3) 78- 83 F6.3 mag Min2 ? Minimum II magnitude or amplitude 84 A1 --- u_Min2 Uncertainty flag (:) on magMinII 85- 86 A2 --- n_Min2 Alternative photometric system for Min2 (G4) 87 A1 --- --- [)] ")" if Min2 is an amplitude 89- 90 A2 --- flt The photometric system for magnitudes (G4) 92-102 F11.5 d Epoch ? Epoch for maximum light, Julian days (G5) 103 A1 --- u_Epoch [:±] Uncertainty flag on Epoch (6) 105-108 A4 --- Year Year of outburst for nova or supernova 109 A1 --- u_Year [:] Quality flag on Year of outburst 111 A1 --- l_Period [<>(] Code for upper or lower limits (7) 112-127 F16.10 d Period ? Period of the variable star 128 A1 --- u_Period [:] Uncertainty flag (:) on Period 129-131 A3 --- n_Period [*/N) 2] Flag on Period (8) 133-135 A3 % M-m/D Rising time (M-m) or duration of eclipse (D) (G6) 136 A1 --- u_M-m/D Uncertainty flag (:) on M-m/D 137 A1 --- n_M-m/D [*: ] Note for eclipsing variable (G6) 139-155 A17 --- SpType Spectral type 157-161 A5 --- Ref1 Reference to a study of the star (G7) 163-167 A5 --- Ref2 Reference to a chart or photograph (G7) 169-180 A12 --- Exists Cases of non-existence of the variable etc. (12) 181-186 F6.3 arcsec/yr pmRA ? Proper motion RA 188-193 F6.3 arcsec/yr pmDE ? Proper motion DE 195-202 F8.3 yr Ep-coor ? Epoch of the coordinates (13) 204 A1 --- u_Ident [?] Uncertainty flag (?) on identification (14) 206-215 A10 --- Ident The source of astrometric data (15) 216-225 A10 --- VarTypeII The new type of variability (16) 227-237 A11 --- VarName Variable star designation (17)
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): traditional transliterations of greek letters are used. Lower- and upper-case latin letters must be distinguished (e.g. u Her and U Her). Note (6): the following codes are used (see also note on Epoch): ":" are used if the epoch is uncertain "+" epoch may be later than that reported "-" epoch may be earlier than that reported. Note (7): the following codes are used: ">" or"<" if period is a lower or upper limit, respectively "(": the period is the mean cycle time of a U Gem or recurrent nova (in this case, there is ")" in pos. 129). Note (8): the following codes are used: "*N" if the period may be a multiple of the quoted value "/N" if the period may be a fraction of the quoted value ")" - see the note on l_Period. Note (12): "=" in byte 169 appears in two cases. First, it is used if the variable is equivalent to another cataloged variable. In such case, after the "=" symbol, the alternative name of the variable follows, and all necessary information on the star is to be found under that alternative name. Second, the "=" symbol may be followed by the star's name in the Catalogue of Extragalactic Variable stars, evs_cat.dat Note (13): Epoch of the given coordinates. No epoch is provided when using the coordinates from the literature if the epoch was no specified in the publication and cold not be established; Note (14): The variable star's identification with the source catalog is uncertain. Note (15): A brief designation of the source of astrometric data. In several cases, the catalog designation is folowed by the symbol "+pm"; it implies that the position for a certain epoch was taken from the catalog and reduced to the epoch 2000.0 using information on the star's proper motion from a different source. Note (16): Upon recommendations of the IAU Commissions 27 and 42, in 2006, we developed a new experimental system of classification for variable stars. Note (17): The repetition of the GCVS name. Below, we give a list of the major catalogs and other data sources used, roghly in the order of our preference in identifying variable stars (see also the description of the catalogs provided for A.A. Volchkov's visualization code we used at www.simfov.ru). Hip - The Hipparcos Catalogue (ESA 1997). Tyc2 - The Tycho Catalogue (Hog et al. 2000). In isolated instances where the star is absent in the second Tycho catalogue but is present in the first catalogue (ESA 1997), the source is indicated as Tyc1. UCAC2 - US Naval Observatory CCD Astrograph Catalog (Zacharias et al., 2004). PPM - The Positions and Proper Motions (Roser et al. 1991-1993). NPM - The Lick Northern Proper Motion Program (Klemola et al. 1987). AC - The Four-Million Star Catalog (see Gulyaev and Nesterov 1992). ACT - The ACT Reference Catalog (Urban et al. 1997). GSC 2.2 - The Guide Star Catalog, Version 2.2.01, 2001, Space Telescope Science, Institute and Osservatorio Astronomico di Torino. GSC - The Guide Star Catalog (Lasker et al. 1990). The symbol "ns" accompanying a GSC reference implies that the entry is marked as a nonstellar object in the cited catalog. A2.0, B1.0 - A Catalog of Astrometric Standards (Monet et al., 1998) (there were rare cases when the star could be found only in the previous version of the catalogue, marked as A1.0); The Whole-Sky USNO-B1.0 Catalog of 1 045 913 669 Sources (Monet et al., 2003). 2MASS - The Two Micron All Sky Survey (Cutri et al., 2003). GCVS - For some 10 stars, the coordinates were measured by the authors using Digitized Sky Survey images, plates from different collections, or other images. Lit. - The coordinates taken from current astronomical periodicals.
Byte-by-byte Description of file: gcvs_rem.dat
Bytes Format Units Label Explanations
1- 12 A12 --- GCVS Variable star designation 14- 80 A67 --- Text Text of note
Byte-by-byte Description of file: crossid.dat
Bytes Format Units Label Explanations
1- 32 A32 --- Name Alternative name (catalog or list acronym is detailed in the file "abbrev.txt") (1) 33 A1 --- --- [=] 34- 45 A12 --- VarName Designation in GCVS or NSV or in Catalogue of Extragalactic Variable stars (1) 48 A1 --- u_VarName [:? ] Flag for doubtful identifications
Note (1): Designations of components of double/multiple stars: A,B,C ...; a,b,c ...; 1,2,3 ...; the symbols P = preceding, F = following, N = northern, S = southern may also appear. In the cases of ADS 03201 and ADS 03202 the symbols k1 and k2 mean kappa 1 and kappa 2, respectively.
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 catalog compilers 8 A1 --- n_NSV [*] Notes in published catalog or remark in file "nsv.rem.dat" (2) 10- 11 I2 h RA1950h ? Hours RA, equinox B1950.0 (G1) 12- 13 I2 min RA1950m ? Minutes RA, equinox B1950.0 (G1) 14- 17 F4.1 s RA1950s ? Seconds RA, equinox B1950.0 (G1) 18 A1 --- DE1950- Sign Dec, equinox B1950.0 (G1) 19- 20 I2 deg DE1950d ? Degrees Dec, equinox B1950.0 (G1) 21- 22 I2 arcmin DE1950m ? Minutes Dec, equinox B1950.0 (G1) 23- 24 I2 arcsec DE1950s ? Seconds Dec, equinox B1950.0 (G1) 25- 26 A2 --- u_DE1950s [:* ] accuracy flags (G2) 27 A1 --- IDflag [?:*I] Flag for doubtful identification 28- 29 I2 h RAh ? Hours RA, equinox J2000.0 (G1) 30- 31 I2 min RAm ? Minutes RA, equinox J2000.0 (G1) 32- 35 F4.1 s RAs ? Seconds RA, equinox J2000.0 (G1) 36 A1 --- DE- Sign Dec, equinox J2000.0 (G1) 37- 38 I2 deg DEd ? Degrees Dec, equinox J2000.0 (G1) 39- 40 I2 arcmin DEm ? Minutes Dec, equinox J2000.0 (G1) 41- 42 I2 arcsec DEs ? Seconds Dec, equinox J2000.0 (G1) 44 A1 --- u_DEs [:*] accuracy flags (G2) 46- 51 A6 --- VarType ? Type of variability (3) 53 A1 --- l_magMax [><(] Limit or amplitude symbol on magMax (G3) 54- 58 F5.2 mag magMax ? Magnitude at maximum brightness (4) 59 A1 --- u_magMax [:] Uncertainty flag on magMax 61- 62 A2 --- l_magMin [><( ] Limit symbol on magMin (G3) 63- 68 F6.3 mag magMin ? Minimum magnitude or amplitude (4) 69 A1 --- n_magMin The photometric system for amplitudes (G4) 70- 71 A2 --- u_magMin [st: ] a light amplitude is reported for the minimum and it is given in steps Uncertainty flag (:) on magMin 72 A1 --- --- [)] ")" if magMin is an amplitude 74- 75 A2 --- flt The photometric system for magnitudes (G4) 77- 81 A5 --- Ref1 Reference to a study of the star (G7) 83- 87 A5 --- Ref2 Chart reference (G7) 89-102 A14 --- Desig Designation in paper Ref1 (8) 104-118 A15 --- SpType Spectral type (9) 120-127 A8 --- SpType2 Spectral type from HD catalog in brackets (9) 128 A1 --- f_NSV [=|] '=' for named variables 129-149 A21 --- 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): see the document by Kukarkin et al. (New Catalogue of Suspected Variable Stars (Nauka, Moscow, 1982) There are several data fields that can contain asterisks. These signify that more complete information will be found in the remarks to the published catalog. The remarks are, unfortunately, not machine readable, but they do contain much supplemental information. There, one will find information covering situations like, e.g.: 1. The discoverer of the light variability is not the author of the paper cited in the variability reference, or is one of several authors of the paper cited. In these cases, discoverers' names are given in original transcriptions of the remarks. 2. The most important additional information about a star, although the NSV compilers did not intend to present complete bibliographies for any cataloged stars. 3. Remarks for visual binaries (in parentheses following the number of a star in the corresponding catalog) giving visual magnitudes for the individual components A and B, angular separations, and position angles for faint components (or semimajor axis of a relative orbit and period of orbital motion). Data for other components are then given where applicable. (Combined magnitudes are generally reported in the machine-readable table.) Note (3): type of variability (see file vartype.txt). The system of variable star classification corresponds to the GCVS4, with six additions (ZZO, AM, R, BE, LBV, BLBOO) introduced in the Name-Lists 67- 72 and in the GCVS vol.V. Note (4): The star's magnitude in minimum and maximum brightness. Instead of the magnitude in minimum, the star's amplitude of variation may be indicated (in brackets). Magnitudes are reported to hundredths if the observations are photoelectric or CCD, 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 (8): The identification of the suspected variable in the paper referenced above. DM numbers are given without a 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). Some identifications are given by coordinate designations, 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. Stars are sometimes designated with numbers from the catalogs of Zinner (ZI, 1929) and Prager (PR, 1934, 1937) because the original discovery publications were not available to the NSV compilers. The catalogs of Zinner and Prager give detailed references to early observations of such stars. Note (9): For NSV, Spectral types and subtypes only are given. Most luminosity classes are III to V, but if a star is a supergiant, more detailed classification information is given in the remarks to the published catalog. The following symbols are used: AF A-F AM Am AP Ap BE Be E emission spectrum EA e sub alpha EV variable emission in spectrum FG F-G KM K-M OF Of PD Pd T characteristics of T Tauri stars For NSVS, Spectral types, subtypes and luminosity classes are given. More detailed classification information is given in the remarks to the catalog. Also the following symbols are used: AF A-F cont continuum e emission spectrum ea e sub alpha FG F-G KM K-M * see Sp type in remarks
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) 7- 80 A74 --- 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): the position is not listed when the variable is equivalent to another catalogued variable ("=" in column Exists, byte 168). Note (G2): (:) a flag indicating that the coordinates are actually rougher than the accuracy standard adopted in the this table. The actual accuracy of coordinates is indicated with the symbols: (:) means right ascensions accurate to one second of time and declinations accurate to one tenth of an arcminute; (*) means declinations accurate to one arcminute. 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. Field is non-blank if magMin is a magnitude or amplitude given in a system other than that indicated by magCode. The main codes are p (or P, PH, pg) (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. The designations u, v, b, y refer to the Stroemgren system. The symbols Ic, Rc mean magnitudes in Cousins' I, R system; Hp, T - in Hipparcos and Tycho mission systems; J, H, K, L, M - infrared magnitudes. G - Gaia magnitude u', g' r' i' - SDSS photmetric system See also the documents by Kholopov et al. (1985-1988) or Warren (1988). 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, but this is explained only in the remarks to the catalog, which are not available in machine-readable form at this time. The epochs are Julian dates, with the starting figures 24... omitted; The only exception is WY Sge, where the complete epoch is JD 237249:. The codes ":" are used if the epoch is uncertain. 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".References: "00001" - if the main characteristics of the star were determined by the authors themselves. "00002" - "10204" - GCVS 4.2 "N0001" - "N0412" - New designations GCVS 5.1 "V 001" - "V 554" - Catalogue of Extragalactic Variable stars, evs_ref.dat "67001" - "81321" - Name-Lists Nos.67-81 " HIP" - The Special Name-List No.74 for Hipparcos Variables. "n0001" - "n2910" - references to the Suspected variables (first part) "s0001" - "s2022" - references to the Suspected variables (supplement If no chart is available for the variable, but the star is contained in one of the Durchmusterung catalogs or the Hubble Space Telescope Guide Star Catalog, the corresponding abbreviation (BD, CPD, CoD, GSC, HIP, USNO, 2MASS, UCAC2) is given. 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) * 11-Sep-2017: GCVS 5.1. Version 2017-Mar the "gcvs_cat.dat" file contains new columns with the proper motions and the new type of variablility. The catalog includes the Name lists 67-81, for a total of 52011 variables.
(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

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