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[vsnet-campaign 820] DW Cnc
An accurate sequence and chart are now available for this
variable star thanks to field photometry acquired by Arne Henden.
The chart, courtesy of Mike Simonsen, is available at:
http://joevp.20m.com/cgi-bin/i/charts/hscharts/South_up/
The full field photometry file, including R&I measures, is at:
http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/dwcnc.dat
Bruce Sumner
-----------------------
208 DW CANCRI (UG) Range: 14.1v-17.5p
Position: 07 58 53.04 +16 16 45.5 (J2000, from .dat file)
Magnitude: V=14.915 B-V=0.023 (.dat file)
ID RA (2000) DEC X Y N V ERR B-V ERR
a) Comparison star sequence
1 07 59 12.1 +16 13 28 275 -197 2 12.331 0.019 0.506 0.031
2 07 58 43.0 +16 17 24 -144 39 2 12.688 0.010 0.465 0.005
3 07 59 06.8 +16 18 22 199 97 2 13.437 0.006 0.525 0.008
4 07 58 35.6 +16 13 47 -251 -178 2 13.757 0.032 0.765 0.008
5 07 59 04.6 +16 14 38 167 -127 2 14.074 0.008 0.528 0.002
6 07 58 50.9 +16 14 45 -30 -120 2 14.539 0.012 0.916 0.008
7 07 59 10.1 +16 15 42 247 -63 2 14.907 0.006 0.739 0.013
8 07 59 00.5 +16 16 47 108 2 2 15.198 0.010 0.687 0.013
9 07 58 38.5 +16 19 55 -209 190 2 15.495 0.017 0.781 0.013
10 07 58 55.8 +16 17 11 40 26 2 16.093 0.008 0.944 0.019
11 07 58 50.1 +16 16 50 -41 5 2 17.221 0.011 0.597 0.017
12 07 58 54.4 +16 15 57 20 -48 2 18.701 0.055 0.704 0.151
b) Wide-colour extension for CCD calibration
07 58 38.9 +16 11 30 -203 -315 2 12.938 0.012 0.197 0.004
07 58 34.8 +16 11 11 -262 -334 2 15.703 0.016 1.374 0.020
Notes:
1. This sequence is created from field photometry acquired by Arne
Henden on two separate nights. Apart from the faintest star, this
sequence is quite reliable and is not expected to change when extra
nights are added to a later date to refine the errors. The star #4
has a large error and may be a low amplitude variable.
Bruce Sumner
22 March 2001
vsnet-adm@kusastro.kyoto-u.ac.jp
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