[vsnet-campaign-sn 535] Recently reported SNe on CBET

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear SN watchers,

  Last December, CBET (Central Bureau Electric Telegrams) were
started, which are intended to circulate the discoveries or such
urgent informations when the director of CBAT is unavailable.  They
are available for the subscribers of Computer Service of CBAT.

  In CBETs, no designation of the new objects is available.  For SNe
in VSNET, I will use the tentative name like as below.  Please follow
this manner when submitting your observation to VSNET before the
formal designation becomes available (the subsequent IAUC will report
it).

SN in NGC 4157 (CBET 3):

SN2003-NGC4157  20020624.0  <205C  Puc
SN2003-NGC4157  20030111.32  167C  Puc
SN2003-NGC4157  20030111.86  163C  KuR

# The position of the new object is 12:10:57.72, +50:28:31.8 (J2000.0,
# reported by Puckett; Kushida gives the end figures 57.52, 32.7),
# which is about 65" west and 32" south of the nucleus of a nearby
# (v_r = 774 km/s from NED) and nearly edge-on spiral (SAB(s)b? sp
# HII) galaxy NGC 4157.  It is superimposed on the inner disk region.
# The Bisei spectrum taken on Jan 12.8 UT revealed that it is normal
# type-II SN (vsnet-campaign-sn 534).  Note that NGC 4157 had produced
# SN IIP 1937A (maximum mag about 15.0) and SN 1955A (caught at mag
# about 16.0p after maximum).

SN in IC 1129 (CBET 4 and 5):

SN2003-IC1129   20020804.0  <202C  Puc
SN2003-IC1129   20030111.32  154C  Puc

# The position of the new object is 15:32:01.91, +68:14:35.9
# (J2000.0), which is about 6" east and 10" south of the center of a
# spiral (Scd:) galaxy IC 1129.  It is superimposed on the faint disk
# region.  The Bisei spectrum taken on Jan 12.9 revealed that it is
# type Ia SN several days before maximum light (vsnet-campaign-sn
# 534).  The expected maximum (from the recession velocity of the host
# galaxy) for typical SN Ia is calculated as mag about 16.4, so the
# discovery magnitude is very bright.  It may indicate that it is
# nearer than estimated from v_r, or is intrinsically bright one.  The
# expansion velocity, which tends to be large in luminous SN Ia, was
# rather normal (12000 km/s).  Further magnitude estimates is urged. 

SN in NGC 3506 (CBET 6):

SN2003-NGC3506  20021104.0   <185C  Bol
SN2003-NGC3506  20030112.148  169C  Bol
SN2003-NGC3506  20030113.55   160:C KAI

# The position of the new object is 11:03:12.33, +11:04:38.3
# (J2000.0), which is about 9" west and 2" north of the center of a
# spiral (Sc:) galaxy NGC 3506.  It is superimposed on the bright
# western arm.  The expected maximum for typical SN Ia is mag about
# 16.4.  

SN in UGC 7224 (CBET 7):

SN2003-UGC7224  20020514.3 <190:C  KAI
SN2003-UGC7224  20021223.5  185:C  KAI
SN2003-UGC7224  20031113.5  173:C  KAI

# The position of the new object is 12:13:21.00, +21:38:48.4
# (J2000.0), which is about 38" east and 44" north of the nucleus of
# an elliptical (E) galaxy UGC 7224.  Several small galaxies are seen
# around this galaxy.  The expected maximum for typical SN Ia is mag
# about 16.7.  

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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