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[vsnet-chat 1261] sn1998dm.fts

Dear VSNET members,

Hello. I am Seiichi Yoshida working on the MISAO Project. Now I
introduce you the examination result of sn1998dm.fts, which was
introduced us in [vsnet 1561].

These data are automatically measured by the PIXY system, an automatic 
image examination software, of the MISAO Project. Reference catalog is 
USNO-A1.0 (V) [V=R+0.375(B-R)]. False data removal and identification
verification have been done by hand after all. For more information
about the project and the system, please see the URL:

http://vsnet.info.waseda.ac.jp/muraoka/members/seiichi/misao/

The output view of the PIXY system is available at:

http://vsnet.info.waseda.ac.jp/muraoka/members/seiichi/misao/tmp/vsnet/sn1998dm.gif

The data of SN 1998dm is:

01 26 13.66 -06 06 10.6  mag=14.2  x= 188.80  y= 147.32
  SN 1998dm in MCG -01-4-44  1h26m13s.97  - 6o06'14".0  16.8 mag (peak: 16.5 mag)  type:Ia   Aug. 22  Lick Observatory Supernova Search

Because the supernova is overlapping on the host galaxy, the measured
position is very inaccurate (5.7 arcmin from the position in IAUC) and 
the measured magnitude is also inaccurate.

In USNO, the host galaxy MCG-01-4-44 is separated into three pieces
and there is a false data at around the position of the supernova.

01 26 10.28 -06 10 20.4  mag=16.42  x= 202.78  y= 223.98
  USNO0825.00327283   01 26 10.44  -06 10 19.8  14.4 R  15.6 B  (14.85V)

looks like an anonymous galaxy.

The position of MCG-01-4-44 in NGC2000 is very different. So the
automatic identification software failed to find this identification.

01 26 14.32 -06 05 40.8  mag=14.5  x= 185.94  y= 138.15
USNO0825.00327522   01 26 14.55  -06 05 36.9   9.3 R   9.7 B  ( 9.45V)
USNO0825.00327515   01 26 14.47  -06 05 38.0  10.5 R  
USNO0825.00327490   01 26 14.04  -06 05 55.4  11.1 R  
MCG-01-04-044  R.A.=01 26.3  Decl.=-06 04  12.5 mag

There are some similar data around the position in NGC2000:

  USNO0825.00327703   01 26 17.51  -06 05 08.7  12.1 R  12.7 B  (12.33V)
  USNO0825.00327870   01 26 20.63  -06 03 32.9  15.4 R  18.1 B  (16.41V)

The automatic identification software output these data as
counterparts of MCG-01-04-044, but they are not a galaxy.

Image Information ****************************************************

Image size:	382 x 253
Center:		01 26 13.26  -06 05 02.3
Field of view:	20.82 x 13.79 arcmin
Pixel size:	3.27" / pixel
P.A.:		1.17 deg
Limiting mag:	15.9 mag
Faintest mag:	17.5 mag
Position error:	0.63" 0.64"
Mag error:	0.51 mag

The following stars are not recorded in the catalog. *****************

01 26 13.66 -06 06 10.6  mag=14.2  x= 188.80  y= 147.32
SN 1998dm in MCG -01-4-44  1h26m13s.97  - 6o06'14".0  16.8 mag (peak: 16.5 mag)  type:Ia   Aug. 22  Lick Observatory Supernova Search

The following stars may be variable. *********************************

01 26 10.28 -06 10 20.4  mag=16.4  x= 202.78  y= 223.98
USNO0825.00327283   01 26 10.44  -06 10 19.8  14.4 R  15.6 B  (14.85V)

01 26 14.32 -06 05 40.8  mag=14.5  x= 185.94  y= 138.15
USNO0825.00327522   01 26 14.55  -06 05 36.9   9.3 R   9.7 B  ( 9.45V)
USNO0825.00327515   01 26 14.47  -06 05 38.0  10.5 R  
USNO0825.00327490   01 26 14.04  -06 05 55.4  11.1 R  
MCG-01-04-044  R.A.=01 26.3  Decl.=-06 04  12.5 mag

Photometric data *****************************************************

SN 1998dm	14.2
MCG-01-04-044	14.5	= USNO0825.00327515 = USNO0825.00327490 = USNO0825.00327522
USNO0825.00324924	14.3:
USNO0825.00325038	14.9
USNO0825.00325209	17.5
USNO0825.00325247	16.4
USNO0825.00325361	13.7
USNO0825.00325564	15.9:
USNO0825.00325589	15.9
USNO0825.00325594	14.1
USNO0825.00325939	17.1
USNO0825.00326498	15.2
USNO0825.00326938	14.9
USNO0825.00326957	15.6
USNO0825.00326962	15.5
USNO0825.00326994	17.3
USNO0825.00327053	16.4
USNO0825.00327205	16.7
USNO0825.00327283	16.4
USNO0825.00327299	15.4:
USNO0825.00327301	13.5
USNO0825.00327363	16.1
USNO0825.00327391	15.5
USNO0825.00327513	12.8
USNO0825.00327625	16.8
USNO0825.00327644	16.2
USNO0825.00327703	12.8
USNO0825.00327870	15.5
USNO0825.00328111	14.0
USNO0825.00328143	13.6
USNO0825.00328563	14.9
USNO0825.00328736	15.8
USNO0825.00328765	16.3
USNO0825.00328856	15.9
USNO0825.00328969	14.4
USNO0825.00329011	14.4
USNO0825.00329017	17.4
USNO0825.00329019	15.3
USNO0825.00329032	15.5
USNO0825.00329093	13.7
USNO0825.00329302	15.3
USNO0825.00329659	14.1
USNO0825.00329793	15.1:
USNO0825.00329886	12.5:

--
Seiichi Yoshida
Muraoka Lab., Waseda University, Japan
seiichi@muraoka.info.waseda.ac.jp
http://vsnet.info.waseda.ac.jp/muraoka/members/seiichi/index.html

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