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IAUC 3637: RADIO OUTBURSTS IN 3C 345, 3C 454.3 AND Q0241+622; 1981 QB

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                                                  Circular No. 3637
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 617-864-5758


RADIO OUTBURSTS IN 3C 345, 3C 454.3 AND Q0241+622
     P. A. Feldman, J. M. MacLeod and B. H. Andrew, Herzberg Institute
of Astrophysics, Ottawa, report that major radio outbursts are
currently occurring in three quasars, as measured at a wavelength
of 28 mm with the 46-m telescope of the Algonquin Radio Observatory.
3C 345 was at 17.1 Jy on Sept. 4, after having reached a highest
recorded 28-mm flux density of 17.7 Jy on Aug. 6; this series of
observations started in 1966 (cf. Andrew et al. 1978, A.J. 83, 863).
3C 454.3 continues to rise rapidly, at ~ 1 Jy per month since June;
it was at 19.8 Jy on Sept. 4.  The bright x-ray-emitting quasar
Q0241+622 (4U 0241+61) was at a record level of 0.71 Jy on Sept.
4.42 UT; the previous radio outburst during 1978-79 was found to be
uncorrelated (or perhaps even anticorrelated) with the 2-10-keV
x-ray flux (Feldman 1979, B.A.A.S. 11, 777).  Observations at radio,
x-ray and optical wavelengths are urged.


1981 QB
     Further precise positions have been reported as follows:

     1981 UT             R. A. (1950) Decl.       Mag.   Observer
     Aug. 28.23125    21 38 43.68   - 7 14 25.7   16.0   Kowal
          28.28333    21 38 39.84   - 7 18 56.9            "
          29.20556    21 37 40.73   - 8 41 47.4   16.0     "
          29.25764    21 37 36.97   - 8 46 25.2            "
          30.20972    21 36 34.57   -10 14 20.2   16.0     "
          30.26181    21 36 30.81   -10 19 11.2            "
          31.20660    21 35 28.30   -11 48 33.7   16.0     "
          31.25868    21 35 24.56   -11 53 26.6            "
     Sept. 1.20903    21 34 20.86   -13 25 26.7   16.0     "
           1.26111    21 34 17.28   -13 30 22.4            "
           2.20625    21 33 13.74   -15 03 34.1   16.0     "
           2.25833    21 33 09.68   -15 08 41.7            "
           3.20938    21 32 05.42   -16 44 06.9   16.0     "
           3.26146    21 32 01.61   -16 49 16.1            "
           6.42800    21 28 26.67   -22 14 30.0   14     Gilmore
           6.44883    21 28 25.06   -22 16 42.3            "

C. Kowal (Palomar Mountain Observatory).  1.2-m Schmidt telescope.
   Beginnings and ends of 75-min exposures.
A. C. Gilmore and P. M. Kilmartin (Mt. John University Observatory).


1981 September 11              (3637)              Brian G. Marsden

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