Central Bureau for Astronomical Telegrams
IAUC 4595: 3C 279, PKS 1510-089 AND OJ 287; 1986J; CBS 114
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Read IAUC 4596
Circular No. 4595
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
3C 279, PKS 1510-089 AND OJ 287
M. R. Kidger, Instituto de Astrofisica de Cararias; and P. M.
Allan, Manchester University, telex: "Results from a multifrequency
quasar monitoring program confirm the result of Robson et al. (IAUC
4556) that 3C 279 has undergone a major flare and is now fading.
Observations made in March and April give a mean K-band flux of 58 mJy
(K = 10.1) with small night-to-night variations. JHKL data obtained
with the 1.5-m Carlos Sanchez telescope in Tenerife on Mar. 25 reveal
a spectral slope of index -1.59. PKS 1510-089 is also found to be in
a particularly high state: on Apr. 14 the K flux was 9.0 mJy (K =
12.1), and similar values were recorded in March. We also note that
OJ 287 is in a particularly low state: a fade from 9.6 to 5.9 mJy (K =
12.0-12.6) was recorded between Mar. 23 and 27, and although
observations during April reveal a partial recovery, this object
remains at or near historical lows."
SUPERNOVA 1986J IN NGC 891
R. J. Allen and S. Sukumar, University of Illinois, Urbana;
and R. Beck, Max-Planck-Institut fur Radioastronomie, Bonn, report
the radio detection of SN 1986J with the Very Large Array. The
flux density at 327 MHz was as follows: 1987 Nov. 24, 11.4 +/- 0.5
mJy; 1988 Jan. 23, 12.0 +/- 0.8 mJy; Mar. 12, 14.3 +/- 0.9 mJy.
CBS 114
D. E. Winget and C. F. Claver, Department of Astronomy and
McDonald Observatory, University of Texas, communicate: "The
strong-line (He I) DB white dwarf star CBS 114 (R.A. = 9h54m53s,
Decl. = +34D14'.0, equinox 1950.0; B = 17) is the sixth known
pulsating DB white dwarf. We observed the star using a high-speed,
two-star photometer with an RCA-8850 tube in unfiltered light on the
2.1-m telescope. This is a complex large amplitude pulsator, with a
peak-to-peak amplitude of about 0.3 mag and a quasi-period of about
640 s. The preliminary power spectrum of a 3-hour run on May 11
indicates two significant bands of power from 670-390 s and 330-230 s;
the amplitude of the largest peak in each group is 0.041 mag (664 s)
and 0.013 mag (277 s). A finder chart for this object can be found in
Pesch and Sanduleak (1986, Ap.J. Suppl. 60, 543)."
1988 May 12 (4595) Brian G. Marsden
Read IAUC 4596
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