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IAUC 8629: 2005ir-2005kc; 173P

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                                                  Circular No. 8629
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVAE 2005ir-2005kc
     Three apparent supernovae brighter than mag 20 have recently
been reported.  SN 2005ir was discovered independently by the Sloan
Digital Sky Survey (SDSS) II collaboration (via multiple g, r, and
i images taken with the SDSS 2.5-m telescope; communicated by J.
Frieman, Fermilab and University of Chicago) and by R. Quimby, M.
Sellers, and F. Castro (University of Texas; via unfiltered CCD
images with the 0.45-m ROTSE-IIIb telescope at the McDonald
Observatory); the tabulated data below are from Quimby et al.
(position uncertainty +/- 0".6).  SN 2005kb was also found by the
SDSS II group.  SN 2005kc was reported by T. Puckett and G. Sostero
(cf. IAUC 8615) via unfiltered CCD images with the 0.35-m automated
supernova patrol telescope.

SN      2005 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2005ir  Nov. 3.11    1 16 43.76  + 0 47 40.4  18.5  1".7 W, 3".4 N
2005kb  Nov. 5       0 50 50.68  + 0 51 13.0  18.1  13".7 W, 8".4 N
2005kc  Nov. 9.04   22 34 07.34  + 5 34 06.3  18.2  7".6 E, 7".4 S

Frieman et al. provide position end figures 43s.80, 40".6 for
2005ir; additional approximate magnitudes:  Aug. 22 and 28, [18.9
(Quimby et al.); Oct. 28 UT, g = 21.1 (SDSS II); Nov. 6.14, 17.8
(Quimby et al.).  Spectroscopy by both groups indicate that 2005ir
is a type-Ia supernova with redshift z = 0.08, with peak brightness
around now.  Additional information on SN 2005ir can be found on
CBET 277.  SDSS magnitudes of 2005kb:  Nov. 5, g = 18.1, r = 18.3,
i = 18.5; Nov. 7, 18.0, 18.0, 18.3.  A spectrum taken on Nov. 8
with the ARC 3.5-m telescope (+ DIS) shows SN 2005kb to be of type
II; an earlier SDSS spectrum shows the host galaxy to be at
redshift z = 0.0153 (cf. CBET 281).  Additional approximate
magnitudes for SN 2005kc in NGC 7311:  Sept. 6 and 9, [20.0; Nov.
11.02, 18.0 (0.60-m reflector).
     Frieman also reports the discovery of 35 additional supernovae
found by the SDSS II collaboration and designated 2005is-2005ka on
CBET 280.  All were fainter than magnitude g = 20.5 upon discovery
in October, and all are type-Ia or probable type-Ia supernovae
except for 2005jq and 2005jr (which are of type IIn).


COMET 173P/MUELLER
     Comet P/1993 W1 = 2005 T1 (cf. IAUC 8613) has been given the
permanent number 173P (cf. MPC 54939).

                      (C) Copyright 2005 CBAT
2005 November 11               (8629)            Daniel W. E. Green

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