[vsnet-alert 3442] SNe 1999dp and 1999dq

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

cf: [vsnet-chart 199] Chart of SN1999dp
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00199.html
cf: [vsnet-chat 2284] Host galaxy of SN1999dp
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg02284.html
cf: [vsnet-chart 200] Chart of SN1999dq
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chart/msg00200.html
cf: [vsnet-chat 2285] Host galaxy of SN1999dq
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-chat/msg02285.html

Dear SN watchers,

  The LOSS KAIT team has discovered two nearby supernovae, both of
which are reported in IAUC 7247.  The recession velocities of their
hosts are about 4000 km/s, which suggest that they can be reach the
brightness of 15-mag order if they are of type Ia.

  First, SN 1999dp is discovered on the image taken on Sept. 2.5 UT
and confirmed on the earlier images.  The location reported as: R.A. =
4h29m16s.66, Decl. = +69o32'00".6 (2000.0), which is about 18" west
and 8" north of the nucleus of the host face-on spiral (Sb) galaxy UGC
3046.  About 3' northwest of this galaxy, there is a compact group of
galaxies, which are probably 2 times more distant than UGC 3046.

  On DSS2 image, there are three confusing stars on the west side of
the host.  The coordinates and magnitudes on the below list are taken
from USNO catalog, and the offsets are read on DSS2 image:

name             R.A.   (2000.0)  Decl.   rmag bmag offsets
U1575_02069691 4h29m17s.827 +69o32'22".20 12.9 15.7 13"W,29"N
U1575_02069543 4h29m16s.025 +69o32'01".93 17.6 19.2 22"W,9"N
U1575_02068549 4h29m16s.116 +69o31'46".56 17.2 18.7 21"W,7"S

The reported nearby star on IAUC 7247 is doubtlessly the second one,
though there is small difference in the coordinates (about 1"); IAUC
tells that the position end figures 15s.87, 02".4.  SN 1999dp lies
between this nearby star and the nucleus of the host, and is quite
neighbour of this field star (offset is about 3-4" SE).

  SN 1999dp has been observed by KAIT as 18.2 mag during Aug. 18.5 to
the discovery image.  It indicates that SN 1999dp is probably in the
plateau phase of type II supernovae.  Needless to say, however, the
spectral confirmation is necessary and urged.

  Second, SN 1999dq is found and confirmed on Sept. 2.5 and 3.4 UT,
when the magnitude was 16.3C and 16.0C, respectingly.  It suggests
that this SN is in the rising phase, and probably among the bright
type (Ia or some peculiarly bright ones).  The location is R.A. =
2h33m59s.68, Decl. = +20o58'30".4 (2000.0), which is 4" west and 6" 
south of the nucleus of slightly-tilted spical (Sc) galaxy NGC 976.  
It is well inside of the bright bulge region.  There is no confusing
field star except two faint stars on the 45" NNW and 46"NE (quite
further than SN) from the center. 

  To understand the nature of SN 1999dq, the earlier spectroscopy and
continuous photometries (magnitude estimates) is strongly encouraged. 

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

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