M31Stars/deep ivo://nasa.heasarc/m31stars2 NASA/GSFC HEASARC Magnier et al.; Haiman et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Star The MIT/Amsterdam M 31 Survey, or the Extended Magnier et al. Catalog of Objects in the Field of M 31, is based on deep BVRI CCD photometry that was performed on a 1 square degree region of M 31. The observations were made between September 12 and September 27 1990, using the McGraw-Hill 1.3m telescope at the Michigan-Dartmouth-MIT (MDM) observatory at Kitt Peak. The catalogue has typical completeness limits of 20.7 (Bmag), 21.7 (Vmag), 20.2 (Rmag) and 20.5 (Imag), although there is a large region in the inner disk for which the completeness limits are substantially deeper: 22.3 (Bmag), 22.2 (Vmag), 22.2 (Rmag), and 20.9 (Imag). The photometric accuracy is about 2% at Vmag = 19. The final astrometric calibrations take into account the systematic error discovered in the Berkhuijsen et al. (1988, A&AS, 76, 65) catalog by Magnier et al. (1993, A&A, 272, 695). They are in the J2000 system and are eventually tied to the HST Guide Star Catalog. The final photometric calibrations are tied via the NGC 206 region to photometry taken at the Michigan-Dartmouth-MIT (MDM) 1.3m in September and October 1993. These are tied to the Landolt (1992, AJ, 104, 340) system of standard stars, and are in the Johnson-Kron-Cousins system (BVRcIc). This version of the MIT/Amsterdam M31 Survey Catalog was created at the HEASARC in March 1999 based on the CDS/ADC Catalogue II/208. The HEASARC revised this version in February 2001. This is a service provided by NASA HEASARC . 1992A&AS...96..379M https://heasarc.gsfc.nasa.gov/W3Browse/all/m31stars2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=m31stars2& GET text/xml 180 99999 true 9.641872 40.058039 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=m31stars2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_m31stars2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 STAR CATALOG 0.0166666666666667 Optical public m31stars2 MIT/Amsterdam M 31 Survey name Catalog Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable bmag B Magnitude phot.mag;em.opt.B double nullable bmag_error Mean Error in B Magnitude stat.error;phot.mag;em.opt.B float nullable vmag V Magnitude phot.mag;em.opt.V double nullable vmag_error Mean Error in V Magnitude stat.error;phot.mag;em.opt.V float nullable bmag_dophot DoPHOT Type Number(s) for B Magnitude Detections char nullable rmag Cousins R Magnitude phot.mag;em.opt.R double nullable dec_error Scatter in Dec (arcseconds) arcsec stat.error;pos.eq.dec;meta.main double nullable sequence_number Sequence Number int nullable lii Galactic Longitude degree pos.galactic.lon double nullable rmag_dophot DoPHOT Type Number(s) for R Magnitude Detections char nullable rmag_error Mean Error in R Magnitude stat.error;phot.mag;em.opt.R float nullable imag_dophot DoPHOT Type Number(s) for I Magnitude Detections char nullable vmag_detects Number of Detected V Images short nullable rmag_detects Number of Detected R Images short nullable class Browse Object Classification src.class int nullable imag_error Mean Error in I Magnitude stat.error;phot.mag;em.opt.I float nullable bii Galactic Latitude degree pos.galactic.lat double nullable imag Cousins I Magnitude phot.mag;em.opt.I double nullable vmag_dophot DoPHOT Type Number(s) for V Magnitude Detections char nullable bmag_detects Number of Detected B Images short nullable imag_detects Number of Detected I Images short nullable ra_error Scatter in RA (arcseconds) arcsec stat.error;pos.eq.ra;meta.main double nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable