(fwd) Nova Sgr 1994 photometry

>From PHYS162@cantva.canterbury.ac.nz Fri Mar  4 09:14:10 1994
Date: Fri, 4 Mar 1994 08:31:25 +1300
From: "Pam Kilmartin & Alan Gilmore, Mt John." <PHYS162@cantva.canterbury.ac.nz>
Subject: N Sgr 1994 photometry
To: nova@nova.la.asu.edu
Message-ID: <Mar8@hoge.baba.hajime.jp>
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Nova Sagittarii 1994
Photometry by A.C. Gilmore with the 0.6-m f/16 Cassegrain at Mt John
Observatory.  Marginal conditions: cloud nearby, later interupted
observation; region low; moonlight bright. Uncertainty about +/- 0.05
magnitude in all colours.

      U.T.          V     U-B    B-V    V-R    V-I    Air mass
1994 Mar.  3.67    8.67  +1.22  +1.65  +0.93  +1.82     2.0


Remeasure of the stars used on Feb. 27 shows that the apparent large
inconsistencies in results were due to star HR 7088 = HD 174309 being
brighter and bluer than its Bright Star Catalogue V and U-B by about 0.3
and 0.2 magnitudes respectively. Its B-V agrees with the BSC value +/-
0.04.  The results from Feb 27 are unchanged but the uncertainty is reduced
to around +/- 0.05.  The result is repeated below for comparison

      U.T.          V     U-B    B-V    V-R    V-I     Air mass
1994 Feb. 27.68    8.53  +0.97  +1.44  +0.84  +1.55     2.0

So it appears that the nova is fading and reddening.


Alan Gilmore
Mt John University Observatory and Department of Physics & Astronomy
University of Canterbury, Christchurch, New Zealand.