V/97 Updated 3rd Cat Variable Stars in Globular Clusters (Clement+ 1997)
Preliminary Fourth Edition of the Catalogue on Variable Stars in Globular Clusters Clement C. <Unpublished (1997)> A Third Catalogue of Variable Stars in Globular Clusters Comprising 2119 Entries Sawyer Hogg H. <Publications of the David Dunlap Observatory, University of Toronto, Volume 3, Number 6 (1973)> =1973PDDO....3....6S
ADC_Keywords: Stars, variable; Clusters, globular Description: This Catalogue is an update to Helen Sawyer Hogg's Third Catalogue on Variable Stars in Globular Clusters (1973, David Dunlap Observatory Publications, Volume 3, Number 6). This update is based mainly on reference cards prepared by Helen Sawyer Hogg from articles published in the literature in the period 1973 to 1988. There are also some references entered from more recent literature and we are attempting to bring the catalogue up to date. Not all known globular clusters have been included, as the literature search is not at this point complete. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This File clusters.dat 74 136 Globular Cluster data variabls.dat 123 2664 Variables in and near Globular Clusters biblio.dat 146 1621 References to the data notes.dat 104 101 Remarks and notes byclustr.txt 112 5850 Data Organized by Cluster
See also: http://www.astro.utoronto.ca/~cclement/read.html : On-line Catalog of variable stars in globular clusters Byte-by-byte Description of file: clusters.dat
Bytes Format Units Label Explanations
1- 9 A9 --- clusterID *Cluster name 11- 12 I2 h RAh Right Ascension hours (1950, see Epoch) 14- 17 F4.1 min RAm RA minutes 20 A1 --- DE- Declination sign 21- 22 I2 deg DEd Declination degrees (1950, see Epoch) 24- 25 I2 arcmin DEm Declination arc minutes 27- 32 F6.1 yr Epoch *? Epoch of coordinates if not 1950 36- 61 A26 --- Name cluster name and other designations 62- 70 A9 --- cluster_ID IAU cluster name with ± sign for p/m 72- 74 I3 --- Nvar number of variables or any known variables in or around the cluster
Note on clusterID: The name of the file indicates the IAU cluster name, in the format C####p### or C####m###, where the "p" and "m" indicate plus or minus, as there may be difficulty in naming files with "-" or "+" on host systems. Note on Epoch: There is some uncertainty about the reliability of the epoch values. Use them with caution. A future update will resolve this issue.
Byte-by-byte Description of file: variabls.dat
Bytes Format Units Label Explanations
1- 9 A9 --- clusterID Cluster's name 11- 15 A5 --- var var #, or other id 17- 24 F8.2 arcsec X ? pos x (north) relative to center 25 A1 --- u_X [: ] uncertainty in X 27- 34 F8.2 arcsec Y ? pos y (east) of the cluster 35 A1 --- u_Y [: ] uncertainty in Y 37 A1 --- lmaxmag [<> ] limits to maximum magnitude (usually V or B) 38- 42 F5.2 mag max_mag ? maximum magnitude (unless noted otherwise) 43- 44 A2 --- umaxmag [:? ] uncertainty flags 46- 47 A2 --- lminmag [> ] upper limit minimum magnitude 48- 52 F5.2 mag min_mag ? minimum magnitude (unless noted otherwise) 53- 54 A2 --- uminmag [: ?] uncertainty flags 56- 65 F10.4 d JD-2400000 ? Epoch(max mag) 66 A1 --- u_JD-2400000 [:?* ] uncertainty flags 68 A1 --- l_P [> ] upper limit period P 69- 80 F12.8 s P ? Period (in seconds) for long periods see the remarks 81 A1 --- u_P [: *#] uncertain period flag (#=::) 82-123 A42 --- remarks *Pointers to references, names from objects by authors, variability, membership, alternate periods
Note on remarks: In the remarks the following abbreviations are used: + or - : increasing or decreasing period var: variable not var: determined not to be variable mem: member of the cluster f: field star note (1): The visual magnitude data were originally given in mean V and amplitude but were converted to fit in the table. See the original data file on the object. note (2): Epoch is the time of maximum for RR Lyrae and XX PHe and minimum for the EW variables. note(3): Not the maximum and minimum visual amplitudes, but mean(B) and amplitude are given.
Byte-by-byte Description of file: biblio.dat
Bytes Format Units Label Explanations
1- 9 A9 --- clusterID Cluster name 11-146 A136 --- text *reference and notes pertaining to the reference
Note on text: A few new abbreviations are used here in regard to the literature consulted. They include: A&SS - Astrophysics and Space Science CA&A - Chinese Astronomy and Astrophysics CA - Chinese Astronomy SA - Soviet Astronomy SA Lett - Soviet Astronomy Letters
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 9 A9 --- clusterID Cluster name 11-104 A94 --- note Notes to the variabls.dat table
Organization of the information in file byclustr.txt: This data file is the original data from the author, and organized by cluster. The file format is first some information about the cluster (which has been put in table clusters.dat), then the table of the variables' properties (see the table variabls.dat), followed by notes about the data (see notes.dat) and references (see references.dat). The extracted tabular data hopefully will make searches easier to do. Please note that not all known globular clusters have been included, as the literature search is not at this point complete. At the beginning of the file is a header containing the cluster name, with multiple designations shown if they are in common use. Following are the RA and Dec of the cluster. The RA and Dec are the 1950 coordinates unless otherwise noted. This is followed by a listing of any known variables in or around the cluster. This section will be discussed in more detail elsewhere. Following the variable star listing is a bibliographical listing of papers related to the cluster. Brief notes accompany each reference to aid in locating the information desired. The bibliographical references are sorted approximately chronologically. Due to space limitations the summary notes are very brief and should only be taken as an indication of the nature of the article. It should be noted that the references from approximately 1973 to 1988 are fairly complete and are based on reference cards prepared by Helen Sawyer Hogg. The literature survey is ongoing. For references dating back earlier than 1973, one should refer to the 3rd Catalogue of Variable Stars in Globular Clusters (Sawyer Hogg, 1973) and the references contained therein. Variable Star Listing (see also variabls.dat): This section of the file is set up almost identically to the format of the previous version of this catalogue. New variables announced between 1973 and 1988 have been assigned a number according to the system in use in the 3rd Catalogue. They are reported in this section with numbers that continue from those given in the 3rd Catalogue. Often this numbering of variables differs from that of the authors, but this system has been used as the numbering systems used by the authors of the literature often conflict with each other. Wherever possible, comments have been made to indicate the reference in which a variable is first reported and the author's own designation for the variable. For variables announced after 1988, we have decided, in most cases, to adopt the authors' nomenclature instead. The listing gives, in order, the variable number, the position in relation to the cluster centre in arcseconds north(x") and east(y"), the visual maximum and minimum magnitudes (Generally in B or V, consult the references for more information), the epoch of maximum, the period, and then brief remarks pertaining to the variable. Most of the remarks made about variables have the same meaning as in the 3rd catalogue. In addition to those comments, remarks have been made about membership (mem or mem?), and field variables are indicated as f or f?. Alternate periods are often given in the remarks column. Individual author's designations for variables are often given in this column, the references section of each file should be consulted to aid in identifying these variables. In some cases suspected variables are included in the list, and usually these variables will have the remark var? at some point in their individual line entry. In many cases variables have been reported, only to be shown later not to be variable, these usually have the comment of "not var" in their entry. Confirmed variables that do not have known periods or light curves are identified by "var". This listing of variable stars is not intended to be exhaustive, most known field variables are not included. If there is confusion as to the identification of a variable, the literature should be considered the primary source for acquiring information on these variables. Suggestions on usage: In general, the most recent and reliable periods, epochs, magnitudes and the like are included, but in cases where more than one value was available, a decision was made as to what data was used in this catalogue. If there is confusion as to the source of information in this listing, the best thing to do is to consult the references moving from most recent to earlier papers. Also, articles with a description along the lines of "elements of variables" are much more likely to contain the data appearing in these files. Other papers that will likely contain data on the variables will mention either photometry of variables or photometry of the cluster. The data used in the variable star listings was also generally taken from the more commonly available literature, although this is not always the case. As we continue our work on the catalogue, we are planning to indicate at the end of each cluster's table, the main references for the entries in the table. General Comments on the Catalogue: Several final comments should be made on the catalogue in general. 1) These data are tentative, as modifications and additions to the catalogue files are ongoing, and later changes may invalidate earlier versions of the files. 2) The literature surveyed is only complete to 1988, with some later references included as time has permitted. Even up to and including references of 1988, there may be material missing that should be included in these catalogue files. 3) The numbering of the new variables has been somewhat arbitrary, but a decision had to be made to allow the variables to be identified in a consistent fashion. The original literature should be consulted to obtain definite identifications of new variables. Historical Remarks: The catalog was submitted to the ADC by Christine Clement. The update for 1973 to 1988 was prepared by Tara Rosebery and Quentin Dufton under the supervision of Christine Clement. A further update has been prepared by Jay Burford. The catalog was received by the ADC 16-Apr-1997 in the format closely matching that of Sawyer Hogg's 3rd Catalogue of Variable Stars in Globular Clusters. The data were extensively reorganized by P. Kuin to provide several tables of the basic information in addition to the data given for each cluster in one single file. The identifyer for each Globular Cluster was added to the new tables. Author's Contact Information: Any questions or queries should be addressed to Christine Clement at who is maintaining the catalogue.
(End) N.P.M. Kuin [ADC] 29-Oct-1997
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