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[vsnet-chat 617] Duerbeck sequence for V4334 Sgr
- Date: Thu, 11 Sep 1997 21:50:00 -0700
- To: c.scovil@genie.geis.com, gerard@simbad.u-strasbg.fr, jermilliod@lowell, vsnet-chat@kusastro.kyoto-u.ac.jp, wayne.h.warren.1@gsfc.nasa.gov
- From: bas@lowell.Lowell.Edu (Brian Skiff)
- Subject: [vsnet-chat 617] Duerbeck sequence for V4334 Sgr
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
Folks,
In a preprint to be published in the October 1997 issue of "The
Astronomical Journal", Duerbeck et al. provide a UBVR(Gunn i) photometric
sequence in the field of V4334 Sgr, aka "Sakurai's Object". Although a chart
is given, there are (as usual) no positions for the stars. I have extracted
positions for the stars from the USNO A1.0 star catalogue. The table below
summarizes the BVR data. The second line of each entry shows the nominal
errors for each value; N.B. some quite large uncertainties among the fainter
stars. The brightest star was their main comparison, and its magnitude/colors
were more carefully determined. Note that this star is bright enough to
appear in the southern BD and also in the HDE catalogue with spectral type A0.
\Brian
+++++++++++++++++++
Photometry of stars in the field of Sakurai's Object (V4334 Sgr)
Name RA (2000) Dec V B-V V-R
V4334 Sgr 17 52 32.7 -17 41 08
1 17 52 32.0 -17 39 46 10.601 0.358 0.212 see note
.009 .012 .011
2 17 52 35.1 -17 39 40 14.507 0.981 0.579
.029 .059 .052
3 17 52 35.0 -17 40 18 14.823 1.337 0.786
.067 .111 .068
4 17 52 34.0 -17 40 27 15.446 1.439 0.865
.032 .099 .040
5 17 52 34.0 -17 40 50 15.582 1.922 1.156
.085 .159 .101
6 17 52 33.8 -17 41 03 14.962 2.055 1.226
.076 .143 .096
7 17 52 35.5 -17 41 39 13.913 1.723 0.949
.026 .039 .033
8 17 52 32.8 -17 41 58 15.342 1.056 0.603
.043 .060 .049
9 17 52 29.7 -17 40 14 15.910 1.015 0.635
.091 .123 .102
star 1: HD 312295 (A0) = BD-17 4940 = GSC 6254-1040.
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