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J/A+AS/102/251  Objective-prism survey of em. objects in M31 (Meyssonnier+ 1993)
An objective-prism survey of emission-line objects in M 31.
     Meyssonnier N., Lequeux J., Azzopardi M.
    <Astron. Astrophys. Suppl. Ser. 102, 251 (1993)>
    =1993A&AS..102..251M
ADC_Keywords: Surveys; Galaxies, nearby; Nebulae; Nebulae, planetary

Keywords: galaxies,individual: M 31 - HII regions - planetary nebulae -
          Wolf-Rayet stars - galaxies: stellar content - surveys

Abstract:
    Using GRENS plates taken at the Canada-France-Hawaii telescope, we
    have searched almost the whole extent of M31 for small-diameter
    objects with strong emission lines. Most are planetary nebulae
    candidates, but there are also many Wolf-Rayet star candidates and
    small HII regions or compact parts of large HII regions. A catalogue
    is presented with a cross-identification with previous catalogues.
    Many new planetary nebulae and Wolf-Rayet candidates are found. Their
    distribution is compared with those of other tracers in M31. In
    particular the distribution of planetary nebulae candidates is
    compared with that of the integrated blue light and we confirm the
    result obtained by Jacoby ( 1980ApJS...42....1J) and Ciardullo et al.
    (1989ApJ...339...53C): the number of planetary nebulae per unit total
    luminosity is a constant throughout the disk of M31. The Wolf- Rayet
    star candidates are concentrated in the well-known ring of star
    formation; their total number is estimated as 300 within the limit of
    detection of the deepest existing surveys, but this may still be an
    underestimate of the true number.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        74     1312   catalogue of 1312 emission-line objects in M31
table4.dat        74      203   doubtful candidates emission-line objects


Byte-by-byte Description of file: table3.dat table4.dat

   Bytes Format  Units   Label    Explanations

   2-  5  I4     ---     Seq      Running number
   6-  7  A2     ---     u_Seq    [: ] existence flag, as:
                                    blank  sure
                                    :      doubtful
                                    ::     very doubtful
   9- 10  I2     h       RAh      Right Ascension 1950 (hours)
  12- 13  I2     min     RAm      Right Ascension 1950 (minutes)
  15- 18  F4.1   s       RAs      Right Ascension 1950 (seconds)
      20  A1     ---     DE-      Declination 1950 (sign)
  21- 22  I2     deg     DEd      Declination 1950 (degrees)
  24- 25  I2     arcmin  DEm      Declination 1950 (minutes)
  27- 28  I2     arcsec  DEs      Declination 1950 (seconds)
      31  I1     ---     Npos     number of position measurements
      32  A1     ---     u_Npos   Uncertainty flag on Npos, as
                                    blank  coherent measurements
                                    :  one measurement doubtful or impossible
  34- 53  A20    ---     Names    other identifications (1)
  55- 74  A20    ---     Nature   possible nature of the objects
                                    (if followed by "?", doubtful nature) (2)

Note (1): the following acronyms are used:
   BA  = Baade W., Arp H.: 1964ApJ...139.1027B
   D   = Crampton D.,  Cowley A.P., Schade D., Chayer P.: 1985ApJ...288..494C
   DDB = d'Odorico S., Dopita M.A., Benvenuti P.: 1980A&AS...40...67D
   F   = Ford H.C.,  Jenner D.C.: 1975ApJ...202..365F
         Ford H.C.,  Jacoby G.H.: 1978ApJS...38..351F
         Lawrie D.G.,  Ford H.C.: 1982ApJ...256..120L
         Nolthenius R.,  Ford H.C.: 1987ApJ...317...62N
         Ciardullo R., Jacoby G.H.,  Ford H.C.,  Neill J.D.: 1989ApJ...339...53C
   H   = Crampton D.,  Cowley A.P., Schade D., Chayer P.: 1985ApJ...288..494C
   IT  = Moffat A.F.J.,  Shara M.M.: 1987ApJ...320..266M
   MS  = Moffat A.F.J.,  Shara M.M.: 1983ApJ...273..544M
   OB  = Massey P.,  Armandroff T.E.,  Conti P.S.: 1986AJ.....92.1303M
   WB  = Walterbos R.A.M.,  Braun R.: 1992A&AS...92..625W
Note (2): the abbreviations for the nature are:
   *M:  M star
   CL:  globular cluster
   GAL: galaxy
   HII: compact HII region
   L+C: line + continuum
   QSO: quasi stellar object
   SNR: supernova remnant
   WR:  Wolf-Rayet star


History:
  * 31-Jul-2001: added bibcodes
(End)                                                        [CDS]   07-Jun-1993