[vsnet-campaign-nova 1066] Time series on V4743 Sgr

["Tom Richards" <tom@woodridgeobsy.org>]

Greetings all

A time series was carried out in B and V on V4743 Sgr on 20020922. Data
showed an exactly linear decrease in brightness of 1.038 mag/day(B) and
0.878 mag/day(V). The excess decrease in B over V is most likely due to
increasing airmass.  RMS residuals from the trendline were 0.016 mag(B) and
0.015 mag(V).

Comparison star was GSC6294:1524. Guide 8 gives Johnson magnitudes derived
from Tycho-2 BT and VT as V=9.27, (B-V)=1.046.

Some particular values are:
JD-2452539 Mag B   Mag V
0.9091             6.39
0.9109     6.59
0.9873     6.68
0.9898             6.47
1.0598             6.53
1.0634     6.77


Dr Tom Richards, FRAS
Woodridge Observatory
8 Diosma Rd, Eltham, Vic 3095, Australia.
Tel +61(0)3 9431-1072, Fax +61(0)3 9840-1500
www.WoodridgeObsy.org
Carpe noctem!

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