by Mati Morel

Innes (1914) published a list of 111 variables in UOC20. The majority (77%) have now received GCVS names, while the remainder have NSV designations. The identities of many of these NSV entries are still uncertain, and the work done here provides clarification, using the material (finder charts and descriptive notes) published by Innes, together with modern sources.

Compiled by Tom Richards

Three VSS projects are collecting data on southern eclipsing binaries. Whilst the goals and methods of these projects differ, they have in common the production of measurements of minima, calculations of linear light elements, and classification of spectra – all derived from VSS project observations.

These results are combined into a downloadable CSV text data table, which is updated frequently. Updates are notified on the Variable Stars South Google Group (join at https://groups.google.com/forum/?fromgroups#!forum/variablestarssouth).

The Projects are as follows. Please visit their pages for project information and more detailed project data and results.

1. EQUATORIAL ECLIPSING BINARIES (EEB)
   • http://www.variablestarssouth.org/index.php/research-projects/equatorial-eclipsing-binaries
2. SEARCH FOR PLANETS AROUND DETACHED ECLILPSING STARS (SPADES)
   • http://www.variablestarssouth.org/index.php/research-projects/spades
3. SOUTHERN BINARIES DSLR (SBD)
   • http://www.variablestarssouth.org/index.php/research-projects/dslr-projects/southern-binaries-dslr

The ZIP file contains:

1. Readme describing the database.
2. Database of times of minimum, linear light elements and spectral classifications of southern (and some equatorial) eclipsing binaries studied by Variable Stars South (CSV table format).

Edited by Mati Morel.

As a follow-up to my reworking of the Shapley-Lindsay (SL) catalogue of LMC star clusters, a similar plan of attack has been used for the star clusters of the SMC. The number of catalogued objects here is only a fraction of that in the LMC, so it was fairly straightforward to work through all 220 clusters identified by Hodge & Wright (1977) in their atlas of the SMC.

Lindsay Catalogue of SMC clusters

Four catalogues of SMC clusters were used by Hodge and Wright in compiling their SMC atlas, with Eric Lindsay's 1958 catalogue being the longest, with 116 entries. I have given Lindsay's compilation priority status, and kept his clusters in correct numerical order, even though the precise J2000 positions are not always strictly in order of increasing RA. Entries from other catalogues (K, WG and HW) are inserted in the most appropriate positions, according to RA.

Compared to the LMC, identification problems were rare, and the Hodge-Wright atlas was found to be very reliable, displaying the positions of clusters with commendable accuracy. Nevertheless, Lindsay's published catalogue was consulted to be sure no vital information was missed.

Curiously, while the Lindsay catalogue gives diameters in arcmin for each cluster, the values given are generally far too large, up to 79 arcmin. It is clear that some other scale is meant, perhaps an absolute diameter in parsecs? The BSDL diameter data has been inserted instead.

Merged Lists Of Dark Nebulae - Barnard(1927) & Schoenberg(1964)

Edited by Mati Morel, created: 2008. Last Revision: 2012

Database for N.Sanduleak's LMC Supergiants. Zones -65° TO -72°

Edited by Mati Morel, created: 1999. Latest Revision: 2008

Database for Stars in MW 245 (Reed). Positions added by M. Morel

Edited by Mati Morel, created: 1990. Last Revision: 2012

Edited by Mati Morel

Version 1

In 1994 the first tentative attempt was made to compile a list of comparison stars for variable stars, as reported in certain issues of the IBVS (Morel 1994). In many reports on variable stars where UBV photometry been performed the authors have specified which comparison and check stars were used, and their adopted magnitudes, usually tied to the standard Johnson-Morgan UBV system. To facilitate access to this useful data I compiled a Directory of Comparison Stars Cited in IBVS, commencing with IBVS No. 2081, the earliest one in my set at that time.

The first version tended to concentrate on fainter stars, below 6.00V, for which the IBVS data was likely to be new. Data was compiled by examining each issue of IBVS , initially numbers 2081-4039. V and B-V values were retrieved, and matched with standard catalogue identifiers (HD, SAO, DM etc). Positions were provided for each comparison star, for B1950. In some instances, where IBVS published a sequence of many stars, or a sequence with faint stars below the limit of the Guide Star Catalogue, positions were not readily available, and the table entry merely refers to the entire sequence.

Number of records: 520.

Version 1 was made available to the astronomical community in two formats : ASCII text file, and spreadsheet (Lotus 1-2-3), on diskette upon request.

Version 2

In 2001, at the suggestion of Dr. Andras Holl, the Directory was expanded to cover many missed issues of IBVS, especially numbers 1-2080. The table format was retained, but the number of records was now almost double, and covered IBVS issues 1 - 4209. The complete table of comparison stars can be found on IBVS CD-ROM II as a text file (auxiliary table 4067-t1.txt, to IBVS 4067).

Number of records: 1025.

Version 3 (IBVS4)

In Jan. 2003, upon request, it was agreed to update the Directory again. Firstly, all of the numbers of IBVS 4210-5000 were searched for data. Secondly it was decided to check and amend all positions from epoch B1950 to J2000. This was done using Guide 8 (TM) software. The retrieval of higher precision coordinates was greatly facilitated, as well as retrieving other catalogue numbers. This process also allowed easy checking of IBVS data against data from the Hipparcos/Tycho mission. Any discepancies found were investigated closely and resolved satisfactorily, in most cases.The working name for Version 3 is IBVS4.

Number of records: 1322.

OB Associations Database

Edited by Mati Morel, created: 1997. Last Revised: 2012

Sharov Catalogue of Photometric Sequences

Edited by Mati Morel, created: 2006. Last Revised: 2012

Catalogue of R136 Cluster stars in the LMC

Edited by Mati Morel, created: 2010.