Central Bureau for Astronomical Telegrams
IAUC 8027: 2002jl; 2002ia, 2002ib, 2002jf, 2002jh; PKS 0736+017
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 8028
.dvi or
.ps format.
Circular No. 8027
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)
SUPERNOVAE 2002jl
Further to IAUC 8026, W. M. Wood-Vasey et al. report the
discovery of an apparent supernova (mag 19.3) on unfiltered NEAT
images taken with the Palomar 1.2-m Schmidt telescope on Nov. 19 UT.
Confirming images were made on Nov. 23 (mag 19.2), 26 (mag 19.3),
and 30 (mag 19.3). The new object is located at R.A. = 0h20m13s.95,
Decl. = -0 08'20".7 (equinox 2000.0), which is within 5" of two
different neighboring extended sources. No point source is visible
at this location in NEAT images taken with the Haleakala 1.2-m
telescope on Nov. 6 (limiting mag 20.5 at S/N = 3).
M. Hamuy, Carnegie Observatories, reports that J. Maza
(University of Chile) obtained a spectrum (380-930 nm) of SN 2002jl
with the Las Campanas Dupont 2.5-m telescope (+ WFCCD) on Dec. 2.13
UT, finding it to be a type-II supernova caught at an early
stage. The spectrum is characterized by a blue continuum with
H-alpha, H-beta, and He I 587.6-nm lines exhibiting P-Cyg profiles.
An approximate redshift of 0.064 can be derived from weak, narrow
emission lines superimposed on the supernova spectrum.
SUPERNOVAE 2002ia, 2002ib, 2002jf, 2002jh
Hamuy also reports that spectroscopy (range 320-920 nm), by
Maza and M. Phillips (Carnegie Observatories) with the Baade 6.5-m
telescope (+ Boller & Chivens spectrograph) at Las Campanas, shows
that SNe 2002ia, 2002ib, 2002jf, and 2002jh are all type-Ia
supernovae, with SNe 2002ia (Nov. 29.13 UT) and 2002jf (Nov. 28.19)
about 2-3 weeks past maximum, and SNe 2002ib (Nov. 29.10) and
2002jh (Nov. 28.23) about 10 days past maximum. The spectra reveal
the following redshifts: SN 2002ia, approximately 0.072; SN 2002ib,
0.068 (from superimposed narrow emission lines); SN 2002jf, 0.079
(measured from the host galaxy); SN 2002jh, approximately 0.048.
PKS 0736+017
S. D. Clements, Florida Institute of Technology, writes that
CCD observations during Dec. 5.281-5.549 UT with the SARA 0.9-m
telescope on Kitt Peak show this flat-spectrum radio quasar to be
in a high optical state, with mean V = 15.16 +/- 0.01 and R = 14.61
+/- 0.04 (in its quiescent state, V = 16.4 and R = 15.7). In
addition, PKS 0736+017 was observed to exhibit microvariability
throughout the night, varying by 0.33 mag in V and 0.43 mag in R.
Last year, this source exhibited unusual oscillatory behavior while
in its high state. Follow-up observations by observers at all
wavelengths are encouraged.
(C) Copyright 2002 CBAT
2002 December 6 (8027) Daniel W. E. Green
Read IAUC 8028
.dvi or
.ps format.
Our Web policy. Index to the CBAT/MPC/ICQ pages.
