Central Bureau for Astronomical Telegrams
IAUC 7576: 2001P; 2001Q; 2001M
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Circular No. 7576
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Phone 617-495-7440/7244/7444 (for emergency use only)
SUPERNOVA 2001P IN NGC 3947
W. D. Li, University of California at Berkeley, on behalf of
LOTOSS (cf. IAUC 7514), reports the discovery of a supernova (mag
about 17.5) on unfiltered images taken with the 0.8-m Katzman
Automatic Imaging Telescope (KAIT) on Jan. 31.4 and Feb. 1.3 UT.
SN 2001P is located at R.A. = 11h53m21s.56, Decl. = +20o44'53".3
(equinox 2000.0), which is 17".2 east and 13".1 south of the
nucleus of NGC 3947. A KAIT image taken on Jan. 7.4 showed nothing
at this position (limiting mag about 19.0).
A. V. Filippenko, R. Chornock, and M. Modjaz, University of
California, Berkeley, report that inspection of CCD spectra (range
330-1000 nm), obtained on Feb. 1 UT with the Shane 3-m reflector at
Lick Observatory, reveals that SN 2001P is a type-Ia supernova,
roughly 1 week past maximum brightness. Some spectral features
(e.g., Ti II absorption near 430 nm) suggest that it might be
subluminous.
SUPERNOVA 2001Q IN UGC 6429
Li also reports the discovery of another supernova on
unfiltered KAIT images taken on Jan. 31.4 (mag about 18.6) and Feb.
1.3 UT (mag about 18.3). SN 2001Q is located at R.A. =
11h25m19s.77, Decl. = +63o43'15".6 (equinox 2000.0), which is 4".6
east and 29".6 south of the nucleus of UGC 6429. A KAIT image of
the same field taken on Jan. 2.4 showed nothing at this position
(limiting mag about 19.0).
Filippenko et al. note that spectra obtained as above (but
with poor quality longward of 520 nm) indicate that SN 2001Q is a
young type-II supernova; the hydrogen Balmer absorption lines are
prominent.
SUPERNOVA 2001M IN NGC 3240
N. Suntzeff, Cerro Tololo Interamerican Observatory (CTIO),
writes: "Spectra (range 390-680 nm; resolution 1000) of SN 2001M
(cf. IAUC 7568) were taken (by J. Colianni, T. Gokas, and F.
Winkler, Middlebury College; and R. C. Smith, CTIO) with the CTIO
1.5-m telescope facility spectrograph on Jan. 25.3 and 26.3 UT.
The reduced spectrophotometry shows that SN 2001M is a type-Ic
supernova similar to SN 1994I (Filippenko et al. 1995, Ap.J. 450,
L11), roughly 1-2 weeks past maximum light. Si II at 615 nm is
weak or absent, and there is no evidence of prominent He I lines.
The Na I absorption at 589 nm is also weak, indicating that it is
not more than a few weeks past maximum light."
(C) Copyright 2001 CBAT
2001 February 1 (7576) Daniel W. E. Green
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