[vsnet-chat 1005] (fwd) Revised sequence for N. Oph 1998

[Taichi Kato <tkato>]

From b.sumner@bom.gov.au Fri Jun 26 15:37 JST 1998
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From: "Bruce Sumner" <b.sumner@bom.gov.au>
To: tkato@kusastro.kyoto-u.ac.jp
Date: Fri, 26 Jun 1998 04:37:47 +0000
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Subject: Revised sequence for N. Oph 1998 
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Dear Taichi,

Could you issue the following a a vsnet-chat please.

Regards,
Bruce


*******************************

Revised comparison sequence for Nova Ophiuchi 1998

Arne Henden has been able to obtain accurately calibrated magnitudes 
for this field. This has allowed the previous sequence (vsnet-chat 
990) to be revised. Columns 2 and 3 are the RA and Dec offsets from 
the nova in seconds of arc, with north and east being positive. 
Magnitude errors are less than +/- 0.02. 

No.	 RA(")	 Dec(")    V	  B-V	  V-R	  R-I 
							
1	  345	  217	10.921	 1.820	 1.069	 1.055
2	  -77	  -17	11.745	 1.531	 0.910	 0.832
3	  -54	  -72	12.577	 0.885	 0.567	 0.590
4	  352	  145	12.699	 0.698	 0.454	 0.463
5	   15	 -299	13.074	 0.888	 0.538	 0.538
6	   -1	  -71	13.243	 0.720	 0.484	 0.488
7	  184	  167	13.945	 1.738	 0.988	 0.886
8	    0	  -36	14.095	 0.956	 0.603	 0.589
9	  140	   40	14.426	 0.940	 0.641	 0.575
10	   41	 -111	14.694	 1.776	 1.015	 0.908
11	    9	   49	14.893	 1.910	 1.215	 1.243
12	  -10	   38	14.922	 1.462	 0.856	 0.768
13	   61	   -9	15.020	 1.730	 1.039	 0.951
14	 -104	  -54	15.304	 1.744	 1.064	 0.953
16	    2	  -16	15.641	 0.929	 0.609	 0.626
17	  -26	   33	16.293	 1.520	 0.883	 0.882

It is suggested that this sequence be referred to as 'Henden prelim' 
when reporting observations so as to identify the sequence used.
Arne is still working on this field and the final magnitudes may 
vary slightly from those given here. However for visual purposes 
the changes will be insignificant.

Bruce Sumner 
Melbourne

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