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J/ApJS/120/247      Supernova remnants in M33                (Gordon+, 1999)
A new sample of radio-selected and optically confirmed supernova remnants in M33
      Gordon S.M., Duric N., Kirshner R.P., Goss W.M., Viallefond F.
     <Astrophys. J. Suppl. Ser. 120, 247 (1999)>
     =1999ApJS..120..247G
ADC_Keywords: Supernova remnants ; Radio sources

Keywords: galaxies: individual (M33) - galaxies: ISM - radio continuum: ISM -
          supernova remnants

Abstract:
    Using radio data to identify and optical data to confirm, we have
    established the largest and most complete sample of extragalactic
    radio-bright supernova remnants (SNRs) in the nearby spiral galaxy
    M33. We have identified 53 radio SNRs, doubling the size of the
    earlier survey by Duric et al. (1993A&AS...99..217D).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        68      186   Radio sources in M 33
table4.dat        67       53   Radio-selected sample of supernova remnants


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     [GDK99]   Identification number ([GDK99] NNN in Simbad)
   5-  6  I2    h       RAh       Right ascension (J2000)
   8-  9  I2    min     RAm       Right ascension (J2000)
  11- 15  F5.2  s       RAs       Right ascension (J2000)
      17  A1    ---     DE-       Declination sign (J2000)
  18- 19  I2    deg     DEd       Declination (J2000)
  21- 22  I2    arcmin  DEm       Declination (J2000)
  24- 28  F5.2  arcsec  DEs       Declination (J2000)
  30- 34  F5.1  mJy     S20cm     Total flux at 20cm (1.5GHz)
  36- 38  F3.1  mJy     e_S20cm   rms uncertainty on S20cm
      40  A1    ---     l_S6cm    Limit flag on S6cm
  41- 44  F4.1  mJy     S6cm      Total flux at 6cm (5GHz)
  46- 48  F3.1  mJy     e_S6cm    ? rms uncertainty on S6cm
      50  A1    ---   l_Sp+Index  Limit flag on Sp+Index
  51- 54  F4.1  ---     Sp+Index  Spectral index of the source
  56- 58  F3.1  ---   e_Sp+Index  ? rms uncertainty on Sp+Index
  60- 68  A9    ---     OptID     Optical identification (1)

Note (1): the symbols have the following meaning:
    OI denotes the radiosurces that where outside the ield of view of 
       the optical image
   SNR  denotes the confirmed SNR
   SNRc denotes the SNR candidate
   H II denotes the H II region
   BGND-NOE denotes the background, no optical emission
   BGND-FOE denotes the background, faint optical emission
   BGND-STR denotes the background, stellar-like source
   GC   denotes the galactic center
   *    represent the H II regions with nonthermal spectral indices


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

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     [GDK99]   Identification number ([GDK99] NNN in Simbad)
   5-  6  I2    ---     M33SNR    Gordon et al. (1998ApJS..117...89G)
                                   identification number (M33SNR NN in Simbad)
   8-  9  I2    h       RAh       right ascension (J2000)
  11- 12  I2    min     RAm       right ascension (J2000)
  14- 17  F4.1  s       RAs       right ascension (J2000)
      19  A1    ---     DE-       Declination sign (J2000)
  20- 21  I2    deg     DEd       Declination (J2000)
  23- 24  I2    arcmin  DEm       Declination (J2000)
  26- 27  I2    arcsec  DEs       Declination (J2000)
  29- 31  I3    pc      Diam      Diameter (1)
      32  A1    ---     n_Diam    [*] Note on Diam (1)
      34  A1    ---     l_S20cm   Limit flag on S20cm
  35- 37  F3.1  mJy     S20cm     Total flux at 20cm (1.5GHz)
  39- 41  F3.1  mJy     e_S20cm   ? rms uncertainty on S20cm
      43  A1    ---     l_S6cm    Limit flag on S6cm
  44- 46  F3.1  mJy     S6cm      Total flux at 6cm (5GHz)
  48- 50  F3.1  mJy     e_S6cm    ? rms uncertainty on S6cm
      52  A1    ---   l_Sp+Index  Limit flag on Sp+Index
  53- 56  F4.1  ---     Sp+Index  Spectral index
  58- 60  F3.1  ---   e_Sp+Index  ? rms uncertainty on Sp+Index
      62  A1    ---     Tc        [x] Thermal correction (2)
  64- 67  A4    ---     SpConf    Spectral confirmation (3)

Note (1): Diameters as measured from optical images.
    Geometric mean for noncircular objects. * indicates that measurement
    is highly uncertain due to optical confusion. At 840 kpc, 1"=4.08pc
Note (2): x indicates that the radio fluxes are corrected for thermal
     contamination
Note (3): Sources for optical spectroscopy:
     G98: Gordon et al., 1998ApJS..117...89G (<M33SNR NN>)
     S93: Smith et al., 1993ApJ...407..564S
    BK85: Blair & Kirshner, 1985ApJ...289..582B


History: From ApJS electronic version

(End)                           James Marcout, Patricia Bauer [CDS]  27-May-1999