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[vsnet-sequence 5] AB Nor sequence (Sumner/Henden)
AB Nor sequence (Sumner/Henden)
Subject: [vsnet-chat 3410] AB Nor - Comparison Sequence
172. AB NORMAE (UGSU) Range: 13.9 - ~20p
Position: 15 49 15.48 -43 04 48.6 (J2000)
ID RA (2000) DEC X Y N V visual RASNZ
mag
1 15 49 11.7 -43 07 03 -42 -134 1 10.95 109 a
2 15 49 24.5 -43 05 37 98 -48 1 11.11 111 b
3 15 49 09.4 -43 03 51 -67 -58 1 11.34 114 c
4 15 49 07.8 -43 05 01 -84 -12 1 12.14 122 e
5 15 49 34.5 -43 05 55 199 -66 1 12.59 126
6 15 49 31.1 -43 07 09 171 -139 1 12.96 130
7 15 49 14.1 -43 01 51 -15 178 1 13.28 133 f
8 15 49 17.5 -43 04 57 22 -8 1 13.74 137 m
9 15 49 15.0 -43 03 21 -6 88 1 13.83 138 k
10 15 49 18.3 -43 02 24 31 145 1 14.17 142 g
11 15 49 12.8 -43 02 44 -29 123 1 14.44 144 h
12 15 49 17.8 -43 05 43 -84 -54 1 14.66 147
13 15 49 08.5 -43 06 09 -76 -79 1 15.06 151
14 15 49 20.7 -43 03 16 58 93 1 15.50 155 o
Notes:
1. Errors are estimated to be < +/- 0.05 magnitude. The coordinates
for AB Nor are from an outburst image obtained by Stan Walker.
The coordinates of the sequence stars are from UCAC1. The final
magnitudes for visual observers are given in the last column. The
magnitudes for stars 3 and 4 are modified slightly to fall in line
with Vogt's magnitudes, as given below.
2. This single night V(CCD) sequence has been obtained by
calibration against four V(PEP) magnitudes from Vogt, Publ. VSS
RASNZ, No. 5, (C77), 1977, as follows:
Walker Vogt
V V B-V
10.95 10.90 0.64
11.34 11.39 1.58
12.14 12.15 1.39
13.74 13.70 0.67
3. Ten stars in this sequence are marked by letter on the RASNZ
chart for this variable, dated 30 June 1976. The letters are given
in the column titled RASNZ in the above table. Two faint stars in
the RASNZ sequence were too faint for accurate magnitudes to be
derived, but approximate V magnitudes for these two faint stars
have been obtained, with the following results -
l = 15.7
n = 15.6
4. Thanks to Stan Walker for obtaining the V image from which this
sequence has been derived.
Bruce Sumner
11 July 2000
vsnet-adm@kusastro.kyoto-u.ac.jp