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