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 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 1993A&AS...99..217D).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 186 Radio sources in M 33
table4.dat 67 53 Radio-selected sample of supernova remnants
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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)
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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
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [GDK99] Identification number ([GDK99] NNN in Simbad)
5- 6 I2 --- M33SNR Gordon et al. (1998ApJS..117...89G 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)
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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 1998ApJS..117...89G (<M33SNR NN>)
S93: Smith et al., 1993ApJ...407..564S 1993ApJ...407..564S
BK85: Blair & Kirshner, 1985ApJ...289..582B 1985ApJ...289..582B
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History: From ApJS electronic version
(End) James Marcout, Patricia Bauer [CDS] 27-May-1999