[vsnet-alert 5958] three SNe 2001ck, 2001cl, 2001cm

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

Dear SN watchers,

  IAUC 7641 informed three SN discovery, all of which can become
brighter than mag 16.  SN 2001ck can be overluminous.

  The positions and offsets from the nuclei of the host galaxies are:
             R.A. (2000.0) Decl.       offset   host type
SN 2001ck  14h37m50s.08 +30o29'02".2  5"W, 3"N    *
SN 2001cl  22h22m37s.52  -4o07'30".8 16"E,16"S  SAB(rs)bc
SN 2001cm  15h34m06s.70 +56o41'26".2 36"E,17"N  Sb

  Note that the host galaxy of SN 2001ck (UGC 9425) is a northern part
of the colliding pair galaxies (= Arp 241).  SN locates fairly near to
the northern nucleus.  The recession velocity of this pair is about
10000 km/s, from which the expected maximum of typical SN Ia is about
17.3.  The reported magnitudes (June 3.3 UT, 172:C; 4.3, 168:C)
suggest that it can be somewhat overluminous one.

  The host galaxy of SN 2001cl (NGC 7260) has another NGC entry as
7257.  The SN superimposed on the southeastern arm of the face-on
barred spiral galaxy.  There is a foreground star (USNO_A2.0
cataloged, but rmag on USNO is not reliable. Rmag is estimated as
mag about 18) 3" west and 14" south of the SN.  Other infrared source 
locates 13" west-southwest of the nucleus.  The SN was discovered at
mag about 17.2 on June 4.5 and confirmed at the same mag on the next
day.  The expected maximum of typical SN Ia is about 15.7. 

  SN 2001cm locates on the dust lane of the edge-on spiral galaxy, so
can be affected by the extinction.  It was mag about 16.8 on June 5.72
UT and rising.  The expected maximum of typical SN Ia is about 15.0.

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

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