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[vsnet-chat 1007] Nova Oph 1998 sequence and obs. (Henden)
- Date: Sat, 27 Jun 1998 09:36:02 +0900 (JST)
- To: vsnet-chat, vsnet-obs
- From: Taichi Kato <tkato>
- Subject: [vsnet-chat 1007] Nova Oph 1998 sequence and obs. (Henden)
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
From aah@nofs.navy.mil Sat Jun 27 09:30 JST 1998
From: aah@nofs.navy.mil
To: tkato@kusastro.kyoto-u.ac.jp
Cc: b.sumner@bom.gov.au, aah@nofs.navy.mil
Subject: sequence for N Oph 1998
Date: Fri, 26 Jun 98 17:20:36 -0700
X-Mts: smtp
Content-Type: text
Content-Length: 2775
Here is the final sequence, based on two nights of photometric observations.
Note that star 14 is located at Bruce's location, but appears to have
quite different magnitudes. I could have made a mistake in picking it
out as I did not have vsnet-chat 990 in front of me.
The estimated zero point error for the sequence is less than
0.01mag, and the Poisson errors are less than 0.01mag. Star '00' is the
nova with its mean magnitude and color for this time period. Star '99'
is a bright star SE which may or may not be a Tycho star; I didn't look
closely at the vsnet chart. Coordinates are accurate to +-100mas based
on 40 or so USNO-A stars.
ID roff doff RA DEC V B-V V-R R-I
00 000 000 262.99911499 -19.23206139 13.165 0.432 0.656 0.222
01 345 217 263.10076904 -19.17197418 10.919 1.832 1.069 1.044
02 -077 -017 262.97665405 -19.23685265 11.750 1.542 0.916 0.823
03 -054 -072 262.98336792 -19.25241470 12.580 0.889 0.570 0.579
04 352 145 263.10299683 -19.19191933 12.695 0.702 0.455 0.463
05 015 -299 263.00347900 -19.31559372 13.067 0.893 0.551 0.530
06 -001 -071 262.99871826 -19.25215530 13.245 0.723 0.484 0.484
07 184 167 263.05346680 -19.18584633 13.944 1.739 0.991 0.884
08 000 -036 262.99926758 -19.24203491 14.100 0.959 0.606 0.590
09 140 040 263.04025269 -19.22100830 14.430 0.941 0.655 0.589
10 041 -111 263.01135254 -19.26287079 14.703 1.781 1.021 0.904
11 009 049 263.00189209 -19.21870232 14.905 1.920 1.224 1.238
12 -010 038 262.99624634 -19.22147942 14.930 1.467 0.858 0.766
13 061 -009 263.01702881 -19.23467445 15.025 1.739 1.042 0.945
14 -104 -054 262.96868896 -19.24705315 15.477 1.847 1.063 0.950
16 002 -016 262.99952250 -19.23695500 15.644 0.937 0.608 0.624
17 -026 033 262.99102320 -19.22387750 16.308 1.541 0.894 0.873
99 432 -318 263.11917114 -19.32035828 10.913 0.686 0.434 0.456
Also, here is the differential photometry for the Nova, using those data
frames where the variable is not saturated (V-R, R-I are essentially constant):
HJD V B-V
50989.7734 13.086 0.444
50989.8633 13.111 0.411
50990.7617 13.300 0.419
These values are accurate to a few millimag internally, but suffer from the
inclusion of a couple of nearby companion stars. You may post any or all of
this data to the net.
Arne
--------------------------------------------------------------------
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