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IAUC 6168: PKS 1156+295; MV Lyr; NO 1994ag; 84P

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                                                  Circular No. 6168
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
Phone 617-495-7244/7440/7444     TWX 710-320-6842 ASTROGRAM CAM

PKS 1156+295
     J. R. Webb and T. Barnello, Florida International University;
I. Robson, James Clerk Maxwell Telescope (JCMT); and R. C. Hartman,
for the EGRET Team and multiwavelength collaboration, write:  "The
optically violent quasar PKS 1156+295 is currently active in the
gamma-ray, optical, and millimeter bands.  A quick-look analysis of
EGRET data for Apr. 25-29 indicated that on Apr. 27 its gamma-ray
emission (> 100 MeV) flared to a flux level of several x 10E-6
photon cmE-2 sE-1, one of the highest levels seen in an active
galactic nucleus by EGRET.  The average flux over the 4-day
observation was about 0.9 x 10E-6 (same units), but it appears that
most of the fluence occurred on Apr. 27.  An unfiltered CCD image
taken on May 2 with the SARA 0.9-m telescope at Kitt Peak indicated
that PKS 1156+295 was bright in the optical region as well, with a
V magnitude of 15.0 +/- 0.1.  Observations from the JCMT indicate
that PKS 1156+295 is also bright in the millimeter region.  Followup
observations are in progress, and additional observations at all
wavelengths are solicited."

     S. Yu. Shugarov, Sternberg State Astronomical Institute; and
V. I. Marsakova, Odessa State University, note that MV Lyr is
possibly returning from a low to an usually bright state.  Their
observations reveal brightness variations on Apr. 25 ranging in U
between 13.90 and 14.52, in B between 15.28 and 15.88, and in V
between 15.56 and 16.14.  On Apr. 27, MV Lyr was much brighter (U =
13.24-13.61, B = 14.51-14.77, V = 14.68-14.75).

     R. H. McNaught, Anglo-Australian Observatory, reports that
images taken last December with the 1-m reflector at Siding Spring
confirm that the object called SN 1994ag (IAUC 6113, 6116) is a red
foreground star, with no evidence of variability.

     R. J. Bouma, Groningen, The Netherlands, points out that the
observed positions and orbital elements of comet D/1931 R1 (cf.
IAUC 6161, MPC 24933, MPC 25030) are completely compatible with
identity with comet 84P/Giclas.

1995 May 5                     (6168)            Daniel W. E. Green

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