Central Bureau for Astronomical Telegrams
IAUC 4913: HDE 245770; 1989 VB; SV Sge; NSV 01098
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Read IAUC 4914
Circular No. 4913
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
HDE 245770
J. C. Bhattacharyya, Indian Institute of Astrophysics,
Bangalore, telexes: "K. K. Ghosh, N. K. Rao, T. P. Prabhu, Y. D.
Mayya, K. Kuppuswamy, and A. Muniandi obtained CCD spectra of
the Be x-ray binary HDE 245770 (= A0535+26) with the
1-m reflector of Vainu Bappu Observatory, Kavalur, between
Nov. 22 and 25. The spectra displayed emission lines of
H-alpha, C II (657.8, 658.2 nm), and He I (667.8 nm). Presence
of C II emission lines suggests that either an outburst of
the Be star (Baade et al. 1988, A.Ap. 198, 211) or x-ray
emission from the compact companion (Ghosh et al. 1989, Ap.J.
344, 437) has taken place. Ultraviolet and x-ray observations
would be of interest."
1989 VB
Extension to the ephemeris on IAUC 4902:
1989 ET R.A. (1950) Decl. Delta r V
Nov. 30 2 52.93 +22 25.8 0.191 1.167 17.5
Dec. 5 3 05.54 +23 20.7
10 3 16.28 +23 59.5 0.258 1.224 18.4
15 3 25.79 +24 27.5
20 3 34.50 +24 48.5 0.336 1.284 19.1
25 3 42.74 +25 04.7
30 3 50.75 +25 17.9 0.424 1.347 19.8
SV SAGITTAE
Further visual magnitude estimates (cf. IAUC 4854): Sept.
1.85 UT, 13.8 (J. Ripero, Madrid, Spain); 8.85, 15.1 (S. Korth,
Duesseldorf, West Germany); 16.78, 13.2 (M. Verdenet, Bourbon-Lancy,
France); 17.85, 15.0 (Verdenet); 27.81, 13.5 (Verdenet); Oct.
4.85, 13.6 (Korth); 17.88, 13.1 (P. Schmeer, Bischmisheim, West
Germany); 26.75, 12.7 (E. Schweitzer, Strasbourg, France); Nov.
16.76, 12.0 (Schmeer); 25.0, 11.7 (J. E. Bortle, Stormville, NY);
27.71, 11.7 (Schweitzer).
NSV 01098
Corrigendum. On IAUC 4903, last line, for 9.24, 1.4
read 9.24, 11.4
1989 November 28 (4913) Daniel W. E. Green
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