J/ApJ/573/306 Radio emission from supernovae (Eck+, 2002)
A search for radio emission from supernovae with ages from about 1 week
to more than 80 years.
Eck C.R., Cowan J.J., Branch D.
<Astrophys. J. 573, 306 (2002)>
=2002ApJ...573..306E 2002ApJ...573..306E
ADC_Keywords: Supernovae ; Radio sources
Keywords: circumstellar matter - radio continuum: stars - supernovae: general
Abstract:
We report Very Large Array radio observations of 29 supernovae (SNe)
with ages ranging from 10 days to about 90yr past explosion. These
observations significantly contribute to the existing data pool on
such objects. Included are detections of known radio SNe 1950B, 1957D,
1970G, and 1983N, the suspected radio SN 1923A, and the possible radio
SN 1961V. None of the remaining 23 observations resulted in
detections, providing further evidence to support the observed trend
that most SNe are not detectable radio emitters. To investigate the
apparent lack of radio emission from the SNe reported here, we have
followed standard practice and used Chevalier's "standard model" to
derive (upper limits to) the mass-loss rates for the supernova
progenitors. These upper limits to the fluxes are consistent with a
lack of circumstellar material needed to provide detectable radio
emission for SNe at these ages and distances. Comparison of the radio
luminosities of these supernovae as a function of age past explosion
to other well-observed radio SNe indicates that the Type II SNe upper
limits are more consistent with the extrapolated light curves of SN
1980K than of SN 1979C, suggesting that SN 1980K may be a more typical
radio emitter than SN 1979C. For completeness, we have included an
appendix where the results of analyses of the non-SN radio sources are
presented. Where possible, we make (tentative) identifications of
these sources using various methods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 57 Observational Parameters
table2.dat 39 29 Distances assumed for SNe
table3.dat 140 57 Summary of data on intermediate-age SNe and
younger SNe in our survey
table4.dat 68 61 Derived mass-loss rates for upper limits and
detections
table5.dat 91 67 Summary of observational data on non-SNe sources
notes.dat 80 77 Notes to table3.dat and table5.dat
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See also:
II/218 : Sternberg Supernova Catalogue (Tsvetkov+ 1998)
II/227 : The Asiago Supernova Catalogue 1999 (Barbon+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [SN]
4- 8 A5 --- SN Supernova name
10- 15 F6.3 GHz Freq Frequency
17- 26 A10 "YYYY/MM/DD" Date Observation date
29- 31 A3 --- VLA VLA configuration
33- 36 F4.1 h Dur Duration of the observation
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [SN]
4- 8 A5 --- SN Supernova name
10- 19 A10 --- Type Supernova type
22- 31 A10 --- Gal Parent Galaxy
33- 37 F5.2 Mpc Dist Distance
39 I1 --- Ref References (1)
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Note (1): References are numbered as follows:
1 = Madore & Freedman, 1991PASP..103..933M 1991PASP..103..933M
2 = Saha et al., 1995ApJ...438....8S 1995ApJ...438....8S
3 = Kelson et al., 1996, Cat. J/ApJ/463/26
4 = Tully, 1988, Cat. VII/145
5 = Saha et al., 1994ApJ...425...14S 1994ApJ...425...14S
6 = Sandage & Tammann, 1974ApJ...194..223S 1974ApJ...194..223S
7 = Hughes et al., 1998ApJ...501...32H 1998ApJ...501...32H
8 = Silbermann et al., 1996ApJ...470....1S 1996ApJ...470....1S
9 = Saha et al., 1997ApJ...486....1S 1997ApJ...486....1S
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [SN]
4- 8 A5 --- SN Supernova name
11- 12 I2 h RAh Supernova right ascension (B1950.0)
14- 15 I2 min RAm Supernova right ascension (B1950.0)
17- 20 F4.1 s RAs Supernova right ascension (B1950.0)
22 A1 --- DE- Supernova declination sign (B1950.0)
23- 24 I2 deg DEd Supernova declination (B1950.0)
26- 27 I2 arcmin DEm Supernova declination (B1950.0)
29- 32 F4.1 arcsec DEs Supernova declination (B1950.0)
34- 43 A10 --- Type SN Type
45- 52 A8 ---- Gal Parent galaxy name (1)
55- 58 A4 --- OGal Other name of parent galaxy
61- 62 I2 h RAg.h Parent galaxy right ascension (B1950.0)
64- 65 I2 min RAg.m Parent galaxy right ascension (B1950.0)
67- 70 F4.1 s RAg.s Parent galaxy right ascension (B1950.0)
72 A1 --- DEg.- Parent galaxy declination sign (B1950.0)
73- 74 I2 deg DEg.d Parent galaxy declination (B1950.0)
76- 77 I2 arcmin DEg.m Parent galaxy declination (B1950.0)
79- 82 F4.1 arcsec DEg.s Parent galaxy declination (B1950.0)
84- 93 A10 --- MType Galaxy type
95-101 F7.3 yr Age ? Age at the time of observation (2)
102 A1 --- l_S20cm Limit flag on S20cm
103-107 F5.3 mJy S20cm ? Flux density at 20cm (3)
108-111 F4.2 mJy e_S20cm ? rms uncertainty on S20c
112 A1 --- l_S6cm Limit flag on S6cm
113-117 F5.3 mJy S6cm ? Flux density at 6cm (3)
119-122 F4.2 mJy e_S6cm ? rms uncertainty on S6cm
123 A1 --- l_Sother Limit flag on Sother
124-128 F5.3 mJy Sother ? Other flux density (3)
130-133 F4.2 mJy e_Sother ? rms uncertainty on Sother
135-140 A6 --- Notes Notes in notes.dat file
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Note (1): Supernovae and galaxy positions and types taken from NED.
Positions have been rounded to the nearest 0.1s and 0.1"
when applicable
Note (2): Age of the supernova past maximum brightness or past date of discovery
(if the date of maximum is not known) at the time of observation. A
negative age stands for a premaximum observation.
Note (3): Flux densities are 3σ upper limits
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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- 2 A2 --- --- [SN]
4- 8 A5 --- SN Supernova name
10- 19 A10 --- Type Supernova type
21- 25 F5.2 Mpc Dist Distance
27- 31 I5 d Age ? Age at the date of observation
33 A1 --- l_S20cm Limit flag on S20cm
34- 38 F5.3 mJy S20cm ? Flux density at 20cm
40 A1 --- l_S6cm Limit flag on S6cm
41- 45 F5.3 mJy S6cm ? Flux density at 6cm
48 A1 --- l_Sother Limit flag on Sother
49- 53 F5.3 mJy Sother ? Other flux density
55 A1 --- l_dM/dtI Limit flag on dM/dtI
56- 62 F7.3 10-6Msun/yr dM/dtI ? Type I mass-loss rate
64 A1 --- l_dM/dtII Limit flag on dM/dtII
65- 68 F4.1 10-6Msun/yr dM/dtII ? Type II mass-loss rate
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Gal Galaxy name
9 A1 --- m_Gal [ES] Multiplicity index on Gal
11- 18 A8 --- MType Morphological type
20- 26 A7 --- Source Source name in the galaxy (1)
28- 29 I2 h RAh Peak right ascension (J2000) (2)
31- 32 I2 min RAm Peak right ascension (J2000)
34- 37 F4.1 s RAs Peak right ascension (J2000)
39 A1 --- DE- Peak declination sign (J2000) (2)
40- 41 I2 deg DEd Peak declination (J2000)
43- 44 I2 arcmin DEm Peak declination (J2000)
46- 49 F4.1 arcsec DEs Peak declination (J2000)
51- 55 F5.3 mJy S20cm ? Peak flux at 20cm
57- 60 F4.2 mJy e_S20cm ? rms uncertainty on S20cm
62- 65 F4.2 mJy S6cm ? Peak flux at 6cm
67- 70 F4.2 mJy e_S6cm ? rms uncertainty on S6cm
71 A1 --- Note [*] See Note (3)
72- 75 F4.2 mJy S3.6cm ? Peak flux at 3.6cm
77- 80 F4.2 mJy e_S3.6cm ? rms uncertainty on S3.6cm
82- 85 A4 --- Class Classification
(H II, SNR or GC for galactic center)
87- 91 A5 --- Notes Notes in notes.dat file
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Note (1): In Simbad, the sources are designated as
[ECB2002] NGC NNNN aaa, <[ECB2002] NGC NNNNW aaa,
[ECB2002] NGC NNNN A, [ECB2002] IC NNNN aaa,
aaa being the abbreviation of the Greek letter.
Note (2): The sources are designated according to the label on each map.
Note (3): For NGC 5128, C, S6cm=5660mJy, S2cm=131mJy
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Note Code of the note
3- 80 A78 --- Text Text of the note
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 01-Oct-2002