[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
[vsnet-sequence 88] Sequence of WZ Sagittae
Norwegian Astronomical Society - Variable Star Section
Sequence of 2003+17 WZ Sagittae [Version 2001 July 23]
Position: R.A. = 20h07m36s.4, Decl. = +17o42'15" (2000.0)
Magnitude: 8.0 - 15.5 v Type: UGSU
This cataclysmic variable erupted in a very rare outburst on
2001 July 23 UT. The eruption was discovered by M. Oshima
[vsnet-alert 6093]. Previous outbursts occured in 1913, 1946,
and 1978.
I have prepared a list of bright comparison stars for this
object. Photometry (V and B-V) are from the Hipparcos catalogue
(stars 1-3) and Tycho-2 catalogue (others). Only stars with
B-V = +1.10 or less are included.
-------------------------------------------------------------
Id. R.A. (2000.0) Decl. V-mag B-V Star Name
h m s o ' "
-------------------------------------------------------------
1 20 04 14.1 +17 44 05 6.87 +0.51 HIP 98835
2 20 07 28.9 +17 01 14 7.62 +0.76 HIP 99128
3 20 05 06.2 +17 52 43 7.93 +0.18 HIP 98912
4 20 04 43.5 +17 55 46 8.09 +0.38 TYC 1621-1084
5 20 09 34.3 +18 08 19 8.40 +0.31 TYC 1622-0192
6 20 07 33.7 +17 40 00 8.74 +0.16 TYC 1621-1830
7 20 06 59.4 +17 55 34 8.98 +0.51 TYC 1621-1106
8 20 06 51.8 +17 54 37 9.32 +0.31 TYC 1621-1757
9 20 08 01.4 +17 40 12 9.67 +1.09 TYC 1622-0989
10 20 07 01.6 +17 36 22 9.88 +0.51 TYC 1621-1781
11 20 07 19.7 +17 18 06 10.21 +1.07 TYC 1621-0193
12 20 08 00.9 +17 38 00 10.68 +0.77 TYC 1622-1921
------------------------------------------------------------
Magnitudes and colours should be accurate to within 0.02
magnitudes for the brighter stars and 0.05-0.10 mag. for the
faintest star. V and B-V from Tycho-2 are transformed from
VT and BT magnitudes by using the method of M. Bessel in
Publ. Ast. Soc. Pacific, 112, 961 (2000). B. Skiff mentions
[vsnet-alert 6099] that star 6 was measured by Krzemenski
and Kraft in 1964 and that its expected R magnitude is
R = 8.64.
Yours sincerely,
Bjorn H. Granslo
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page