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[vsnet-chat 6242] Quiescent magnitude of SS Aur

Regarding recent discussions of the quiescent magnitude of SS Aur, new
charts and a sequence file are now available online at
http://joevp.20m.com/charts/henden/And%20to%20Gem/

The photometry is from Arne Henden with an additional 115 comp star measured
by Doug West, and two stars from Tycho 2 for the bright end of the sequence.

As the current outburst subsides, scatter in the reported quiescent
magnitude is likely to become an issue again.
Direct comparison to the existing AAVSO sequence shows that some faint
magnitudes are in error by as much as 0.5V.

AAVSO  Henden
108            110
108            109s
110            109n
124            121
125            125
132            131
138var?      139
139            139
145            146
148            152
152            153
158            163

********************************************
SS Aurigae
(2000) 06 13 22.44 +47 44 25.6
Type:UGSS
Range:10.5-15.8v*
Sequence CCD(V) A. Henden and M. Simonsen


#   RA                 Dec            n V         Err      B-V    Err
1   06 13 44.84 +47 33 55.1 2 10.666 0.031 0.558 0.071
2   06 13 41.74 +47 41 02.2 2 10.921 0.030 0.521 0.045
3   06 13 23.18 +47 46 31.5 2 11.013 0.004 0.265 0.037
4   06 13 02.65 +47 36 18.3 2 11.172 0.003 0.771 0.000
5   06 12 49.23 +47 47 02.6 2 12.061 0.003 1.036 0.001
6   06 13 44.37 +47 44 53.8 2 12.517 0.006 0.433 0.004
7   06 13 01.26 +47 42 53.3 2 13.142 0.005 1.021 0.005
8   06 13 41.47 +47 39 52.7 2 13.298 0.003 0.947 0.004
9   06 13 12.96 +47 45 00.0 2 13.902 0.004 0.871 0.001
10 06 13 46.47 +47 43 23.0 2 14.086 0.004 0.692 0.005
11 06 13 29.36 +47 44 26.8 2 14.570 0.006 0.740 0.001
12 06 13 31.94 +47 44 06.2 2 15.157 0.011 0.524 0.003
13 06 13 29.61 +47 44 02.2 2 15.299 0.004 0.689 0.012
14 06 13 26.91 +47 45 27.2 2 15.632 0.005 0.713 0.001
15 06 13 11.13 +47 43 54.8 2 15.936 0.003 0.998 0.009
16 06 13 21.03 +47 43 57.0 2 16.290 0.016 0.595 0.035
17 06 13 22.65 +47 42 58.4 2 16.934 0.013 0.640 0.026

Notes:
1. There are two bright Tycho 2 stars that can fill in the bright end of
this
sequence.

06 12 30.83 +47 33 08.4   V=9.61, B-V=0.670
06 12 56.16 +47 54 18.0   V=10.46, B-V=1.041

2. Additional photometry was performed by Doug West for GSC 3379:0020.
(2000) 06 14 40.83 +47 48 09.8  V=11.47+/-0.04, B=12.05+/-0.05

3. *The actual quiescent magnitude is probably fainter than this.

Mike Simonsen
April 19, 2003

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