Central Bureau for Astronomical Telegrams
IAUC 7977: 2002fl, 2002fm, 2002fn, 2002fo, 2002fp, 2002fq, 2002fr
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Circular No. 7977
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
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Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVAE 2002fl, 2002fm, 2002fn, 2002fo, 2002fp, 2002fq, 2002fr
Further to IAUC 7971, J. Raux, Laboratoire de Physique
Nucleaire et de Hautes Energies, University of Paris VI, reports
the discovery of seven apparent supernovae by the Supernova
Cosmology Project. The supernovae were found with the Canada-
France-Hawaii Telescope (CFHT) during a 'rolling search' spanning
Mar. 16-May 20, with reference images having been obtained at CFHT
during Mar.-Apr. 2001 (limiting mag 25.6, S/N = 5). Each field was
observed approximately every third night (except for a few weather
gaps), making it possible to construct lightcurves with at least
seven nights' data for each supernova. Spectral types and
redshifts (given to 0.001 for host-galaxy redshifts, to 0.01 for
supernovae redshifts) were obtained using the following telescopes
(and instruments) listed: Keck (+ ESI), 2002fl; Very Large
Telescope (VLT) UT1 Antu (+ FORS1), 2002fp; VLT UT2 Kuyen (+
FORS2), 2002fm and 2002fr; Gemini (+ GMOS), 2002fn. Objects
without spectroscopy were identified as supernovae using their
lightcurves (cf. Dahlen and Goobar 2002, PASP 114, 284); these
lightcurves exhibited clear brightening over about 2 weeks for each
object, and each showed a 'kink' in the fading portion of the curve
that is characteristic of type-Ia supernovae in the I band. Some
two dozen active galactic nuclei were also observed in these same
fields, but they were all within 0".01 of their galaxy cores, and
they exhibited sudden brightening/fading in their lightcurves. SN
2002fl was 4".0 from its galaxy's core, and SN 2002fo was 3".4 from
the center of its apparent host galaxy. SN 2002fn was only 0".01
from its galaxy's center. The other supernovae were in the range
0".3-0".6 from their host galaxies' centers.
SN 2002 UT R.A. (2000.0) Decl. I z Type
2002fl Mar. 16 14 01 52.33 + 4 39 23.2 21.9 0.26 Ia
2002fm 20 14 00 29.75 + 4 46 50.1 22.5 0.448 ?
2002fn Apr. 12 14 00 07.95 + 4 54 45.4 24.1 0.677 I
2002fo 12 14 01 29.83 + 5 14 20.7 24.7 ? ?
2002fp 12 14 02 18.40 + 4 47 05.9 24.0 0.352 ?
2002fq 16 14 00 51.20 + 4 33 26.2 22.7 ? ?
2002fr 17 14 00 46.40 + 4 33 41.4 22.4 0.31 I?
(C) Copyright 2002 CBAT
2002 September 25 (7977) Daniel W. E. Green
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