Central Bureau for Astronomical Telegrams
IAUC 5460: QSO 0836+710; N Cyg 1992; N Sgr 1992
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Read IAUC 5461
Circular No. 5460
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
QSO 0836+710
The Compton Observatory EGRET Team (C. E. Fichtel, D. L. Bertsch,
R. C. Hartman, S. D. Hunter, P. W. Kwok, J. R. Mattox, P. Sreekumar,
and D. J. Thompson, Goddard Space Flight Center, NASA; D. A. Kniffen,
Hampden-Sydney College; Y. C. Lin, P. F. Michelson, and P. L. Nolan,
Stanford University; E. Schneid, Grumman Aerospace Corporation; and
G. Kanbach, H. A. Mayer-Hasselwander, C. von Montigny, K. Pinkau, H.
Rothermel, and M. Sommer, Max-Planck-Institut fur Extraterrestrische
Physik) reports the tentative identification of a recently detected
source in the gamma-ray energy range above 100 MeV with the quasar
0836+710. The observations were made between Jan. 10 and 23. On
IAUC 5453, Schramm et al. reported an optical flare of 0836+710 in
the same time frame. EGRET will have some additional exposure to
this region of the sky between Mar. 5 and 19.
NOVA CYGNI 1992
H. Mikuz, Ljubljana, Slovenia, forwards the following additional
photometry by A. Dolzan, Litija, Slovenia (cf. IAUC 5457): Feb.
28.188 UT: V = 4.69 +/- 0.02, B-V = +0.47 +/- 0.03, U-B = -0.55 +/-
0.04 (comparison star HR 7876).
Further selected visual magnitude estimates (cf. IAUC 5457):
Feb. 25.134 UT, 4.7 (P. Schmeer, Bischmisheim, Germany); 25.76, 4.8
(M. Westlund, Uppsala, Sweden); 26.146, 5.0 (J. Gerbus, Rimavska
Sobota, Czechoslovakia); 26.25, 4.8 (A. Pereira, Cabo da Roca,
Portugal); 26.77, 4.9 (M. Ohkuma, Tokyo, Japan); 27.11, 5.0 (J. Pietz,
Erfstadt, Germany); 27.48, 4.8 (D. H. Levy, Palomar Mountain, CA);
27.61, 4.9 (K. Krisciunas, Mauna Kea, Hawaii); 28.13, 4.8 (A.
Boattini, Padua, Italy); 28.25, 4.7 (A. Pereira, Cabo da Roca,
Portugal).
NOVA SAGITTARII 1992
Further visual magnitude estimates (cf. IAUC 5453): Feb. 14.68
UT, 8.0 (P. Camilleri, Cobram, Victoria); 16.725, 9.6 (Camilleri);
24.107, 10.0 (D. Overbeek, Edenvale, South Africa).
Corrigendum. On IAUC 5453, line 25, for mag 20 read mag 21
1992 February 28 (5460) Daniel W. E. Green
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