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[vsnet-campaign-dn 1597] (fwd) WZ Sge sequence (Granslo)
(fwd) WZ Sge sequence (Granslo)
Subject: [vsnet-sequence 107] Extended sequence for WZ Sagittae
Extended sequence for WZ Sagittae [Version 2001 Sep 19]
WZ Sagittae: RA = 20h07m36s.53, Decl. = +17o42'15".1 (2000.0).
The following list contains data for comparison stars located
within a few arcminutes from WZ Sagittae. The photometry (V and
R magnitudes, plus B-V colours) is based CCD measurements by
A. Henden, USNO. Only stars bluer than B-V < +1.0 are included in
this sequence. The uncertainties in V, R and B-V are about 0.02
mag. for the brighter objects and increasing to c. 0.05 mag. for the
faintest stars. I have made use of all of Henden's published
measurements.
Catalogue indentifications are from Tycho/GSC and USNO-A2.0 (entries
beginning with 1050). Identifications (magnitudes in integer units
of 0.1 mag.) from the AAVSO and Bouma/Van Dijk charts are also given.
This sequence may be useful for visual and CCD observers.
---------------------------------------------------------------------
R.A. (2000.0) Decl. V-mag B-V R-mag Star Identifications
h m s o ' " GSC/USNO-A2.0 AAVSO Bouma
---------------------------------------------------------------------
20 07 33.7 +17 40 01 8.73 +0.16 8.66 TYC 1621-1830 88 87
20 08 00.9 +17 38 00 10.86 +0.67 10.48 TYC 1622-1921 107 108
20 06 51.6 +17 43 26 11.51 +0.40 ..... TYC 1621-1643 115 ...
20 07 33.6 +17 39 16 11.77 +0.18 11.70 TYC 1621-1758 118 118
20 08 05.4 +17 37 02 11.77 +0.42 11.56 TYC 1622-1112 ... 118
20 07 05.3 +17 41 03 12.30 +0.57 ..... TYC 1621-1826 ... ...
20 07 45.1 +17 42 38 12.59 +0.49 12.30 GSC 1621-2015 126 126
20 07 20.5 +17 41 33 12.70 +0.59 ..... TYC 1621-1717 ... ...
20 07 53.3 +17 42 03 12.78 +0.94 12.24 GSC 1621-1370 128 128
20 07 45.8 +17 40 01 13.10 +0.57 12.77 1050-16517172 131 131
20 07 29.5 +17 43 36 13.24 +0.78 12.81 GSC 1621-2122 ... 132
20 07 26.6 +17 43 57 13.41 +0.75 12.97 GSC 1621-1322 134 ...
20 07 48.6 +17 42 18 13.69 +0.70 13.30 1050-16520363 ... 137
20 07 36.2 +17 44 50 13.87 +0.43 13.58 1050-16506239 ... ...
20 07 22.9 +17 41 12 14.20 +0.65 ..... 1050-16491097 ... ...
20 07 42.0 +17 41 48 14.52 +0.78 14.06 1050-16512844 ... 145
20 07 46.1 +17 44 12 14.96 +0.84 14.47 1050-16517497 ... ...
20 07 28.6 +17 39 21 15.16 +0.84 14.63 1050-16497592 ... 151
20 07 31.1 +17 42 45 15.35 +0.56 15.02 1050-16500408 ... 154
--------------------------------------------------------------------
AAVSO charts: http://charts.aavso.org/standard/SGE/WZ_SGE/WZSGE-E.GIF
and http://charts.aavso.org/standard/SGE/WZ_SGE/WZSGE-G.GIF .
It should be noted that most of AAVSO's fainter comparison stars
are rather red (B-V > +1.0). Comparison star '139' located a few
arcseconds west of WZ Sge has e.g. V = 13.92 and and B-V = +1.45.
Astrosite Groningen chart by R. Bouma and E. van Dijk is at
http://vsnet.shopplaza.nl/astro/vs-charts/WZSGE-F.gif .
In addition to this work, B. Sumner has prepared a UBVRI sequence
based on preliminary measurements by Henden. It is available from
www.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-sequence/msg00089.html .
Henden's photometry of this variable and many other objects can
be obtained from http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/ .
Yours sincerely,
Bjorn H. Granslo
vsnet-adm@kusastro.kyoto-u.ac.jp
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