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IAUC 8251: 2003kj-2003kv; 2003 UN_284

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                                                  Circular No. 8251
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 2003kj-2003kv
     P. Challis, Center for Astrophysics, on behalf of the ESSENCE
project (cf. IAUC 8237, 8021, 8034), reports the discovery of 13
supernovae on multiple R- and I-band images taken at the Blanco 4-m
telescope during Nov. 15-30 by project members.  Spectroscopy --
obtained on Nov. 15-30 with the Very Large Telescope (+ FORS1),
Gemini telescope (+ GMOS), and Magellan (+ IMACS and + LDSS2)
reflectors -- shows all except SN 2003kj (which is of type II) to
be of type Ia.  Included below are measured redshifts; each new
supernova is within 1"-2" of its host-galaxy center.

SN       2003 UT      R.A. (2000.0) Decl.      Mag.    z
2003kj   Nov. 15    1 14 36.56   - 0 23 58.2   22.3   0.1
2003kk   Nov. 15   23 25 36.06   - 9 31 44.7   20.3   0.2
2003kl   Nov. 17    1 09 48.80   + 1 00 05.6   21.0   0.3
2003km   Nov. 19    2 30 09.00   - 9 04 35.9   21.8   0.3
2003kn   Nov. 21    2 09 15.55   - 3 35 41.4   21.3   0.2
2003ko   Nov. 21    2 11 06.48   - 3 47 56.1   21.7   0.4
2003kp   Nov. 21    2 31 02.64   - 8 39 50.8   22.1   0.6
2003kq   Nov. 21    2 31 04.09   - 8 10 56.6   22.6   0.6
2003kr   Nov. 21    2 31 20.96   - 8 36 14.2   22.0   0.4
2003ks   Nov. 21    2 31 34.54   - 8 36 46.4   22.2   0.5
2003kt   Nov. 21    2 33 47.01   - 8 36 22.1   22.8   0.6
2003ku   Nov. 23    1 08 36.25   - 0 33 20.8   22.9   0.8
2003kv   Nov. 27    2 09 42.52   - 3 46 48.6   23.4   0.8


2003 UN_284
     R. L. Millis, Lowell Observatory, on behalf of the Deep
Ecliptic Survey team, reports that the recently reported
transneptunian object 2003 UN_284 (cf. MPEC 2003-X20) is a binary
system.  Scrutiny by K. B. Clancy (Massachusetts Institute of
Technology) of two images taken on Oct. 24 UT at the Kitt Peak 4-m
Mayall Telescope (+ MOSAIC camera) revealed the two objects having
a separation of 2".01 +/- 0".11 and a broad-VR-bandpass-magnitude
difference of 0.59 +/- 0.21 mag, the fainter component lying in
p.a. 305 +/- 3 deg relative to the brighter component.  Subsequent
observations on Nov. 20 (two images) and Nov. 24 (two images) with
the same instrumentation yielded corresponding values of 1".93 +/-
0".10, 0.70 +/- 0.15 mag, and p.a. 299 +/- 3 deg.  The brighter
component has R approximately 23.2.  Additional astrometric and
photometric observations of 2003 UN_284 are encouraged.

                      (C) Copyright 2003 CBAT
2003 December 5                (8251)            Daniel W. E. Green

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