J/AJ/168/22ivo://CDS.VizieR/J/AJ/168/22doi:10.26093/cds/vizier.51680022CDSAnanthamoorthy B.Bhattacharya D.Sreekumar P.Swathi B.2024-11-06T20:20:57Z2024-08-16T08:38:25ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmagellanic-cloudsultraviolet-photometryWe present an improved approach for constructing the UV source catalogs using observations from the UltraViolet Imaging Telescope (UVIT) onboard AstroSat, by considering the Poisson distribution of the UV background. The method is tested extensively using fields that are not crowded, the Small Magellanic Cloud and M31 (Field 13). The results are compared with previous studies that used UVIT observations. This approach is successful in detecting fainter sources and produces a large number of new sources (~15% -92% more). Most of the newly discovered UV sources fall in the faint end of the source distribution (m>~22). The counterparts at other wavelengths are identified for most sources. This approach is more efficient for source detection and provides an opportunity to explore new classes of UV sources.2024AJ....168...22Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJ/724/1389 : Mapping the diffuse UV sky with GALEX (Murthy+, 2010)J/MNRAS/411/2770 : Hot white dwarfs in GALEX-DR5 (Bianchi+, 2011)J/ApJS/215/9 : PHAT X. UV-IR photometry of M31 stars (Williams+, 2014)J/ApJS/247/47 : Ultraviolet survey M31 with UVIT on AstroSat (Leahy+, 2020)J/AJ/161/215 : Far-ultraviolet variable sources in M31 (Leahy+, 2021)J/ApJS/264/40 : AstroSat UV GOODS-N Deep Field cat. (AUDFn) (Mondal+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/22https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/22/table3 (The catalog of UV sources in SMC and M31 Field 13 PHAT survey overlapping region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/22/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/22/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/22/table3?GETtext/xml+votable180.050000true11.5306541.743040.0055555555555555566/2623 2666 33328-33329https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/22?format=asciiUVdefaultJ/AJ/168/22/table3The catalog of UV sources in SMC and M31 Field 13 PHAT survey overlapping regionIDSource ID (1)meta.id;meta.maincharFiltUVIT filter identifier (2)meta.id;instr.filtercharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[11/19] Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-72/42] Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexedABmag[14/23.9] AB magnitude in Filtermagphot.mag;em.UVfloate_ABmag[0.002/0.5] Error in ABmagmagstat.error;phot.magfloatFieldField of observationmeta.id;obs.fieldchar