Central Bureau for Astronomical Telegrams
IAUC 7728: 2001eq; 2001er; V445 Pup
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Circular No. 7728
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2001eq IN PGC 70417
W. D. Li, University of California at Berkeley, reports the
discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova in
unfiltered images taken with the Katzman Automatic Imaging
Telescope. SN 2001eq is located at R.A. = 23h04m56s.78, Decl. =
+19o33'04".8 (equinox 2000.0), which is 3".0 east and 2".6 south of
the nucleus of PGC 70417. Magnitudes for SN 2001eq: Aug. 23.3 UT,
[19.0; 31.3, [18.5; Sept. 12.3, 18.7; 17.3, 18.0; 23.3, 17.6; Oct.
4.3, 18.5.
SUPERNOVA 2001er IN UGC 5301
T. Puckett, Mountain Town, GA; and D. George, Ottawa, ON,
report the discovery of an apparent supernova (mag 17.2) on an
unfiltered CCD frame (limiting mag 18.8) taken with the Puckett
Observatory 0.35-m automated supernova patrol telescope on Oct.
4.42 UT. SN 2001er is located at R.A. = 9h53m20s.66, Decl. =
+42o50'44".8 (equinox 2000.0), which is 5".0 west and 10".1 north
of the center of UGC 5301. The new object was confirmed on CCD
frames taken on Oct. 5.49 with a 0.40-m reflector by J. Newton,
Osoyoos, BC. SN 2001er is not present on images taken by Puckett
on 2000 Jan. 2 and 9, Mar. 26, and Apr. 25 (limiting mag about
20.5), neither is it present on Palomar Sky Survey images taken on
1995 Mar. 28, 1991 Dec. 13 (limiting mag about 21.0), and 1953 Feb.
8 (limiting mag about 19.7).
V445 PUPPIS
M. P. Rupen, A. J. Mioduszewski, and V. Dhawan, National Radio
Astronomy Observatory, write: "Observations with the Very Large
Array show that V445 Pup is currently undergoing a renewed, strong
radio flare. Data taken on Oct. 4 give flux densities of 11.72 +/-
0.23, 14.20 +/- 0.10, and 12.17 +/- 0.08 mJy at 1.425, 4.860, and
8.460 GHz, respectively. The 4.86- and 8.46-GHz flux densities are
significantly higher than those measured on Sept. 25 (8.3 +/- 0.1
and 7.1 +/- 0.1 mJy, respectively). The 1.425-GHz measurement is
much lower than a simple extrapolation of the high-frequency data
would suggest, implying substantial absorption. The opacity
inferred from earlier radio spectra was much lower, so we are
probably seeing synchrotron self-absorption in a small (on the
order of milliarcseconds) radio source that becomes optically thin
as it expands. Further observations at other wavelengths are
strongly encouraged."
(C) Copyright 2001 CBAT
2001 October 5 (7728) Daniel W. E. Green
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