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IAUC 3684: Poss. SN NEAR NGC 1332; E1405-451 AND E1013-477

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IAUC number 

                                                  Circular No. 3684
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


POSSIBLE SUPERNOVA NEAR NGC 1332
     J. Maza, Department of Astronomy, University of Chile, telexes
that M. Wischnjewsky has discovered a possible supernova 318" east
and 171" north of the nucleus of NGC 1332 (R.A. = 3h24m.l, Decl. = -21o31',
equinox 1950.0).  On Mar. 29 the photographic magnitude was 14.


E1405-451 AND E1013-477
     K. Mason, Mullard Space Science Laboratory; J. Middleditch, F.
Cordova and K. Jensen, Los Alamos National Laboratory; G. Reichert
and S. Bowyer, Berkeley Space Science Laboratory, University of
California; P. Murdin, Royal Greenwich Observatory; and D. Clark,
Rutherford Appleton Laboratory, write: "The Einstein x-ray sources
E1405-451 and E1013-477, both initially discovered in the HEAO-1
Soft X-Ray Survey, have been optically identified with stars that
resemble the AM Her class of magnetic cataclysmic variables.  The
positions and approximate V magnitudes of the optical objects
are:

                         R. A. (1950) Decl.         V
     E1405-451        14 05 58.2    -45 03 06      15.5
     E1013-477        10 13 57.24   -47 43 12.1    17

The optical light of E1405-451 is modulated with a period of 101.52
+/- 0.02 min.  In white light, the modulation is quasisinusoidal with
an amplitude of 1.2 mag (peak to peak).  This broad modulation is
less pronounced in the U band (Delta-m ~ 0.2), but a narrow (FWHM ~ 2.5
min), flat-bottomed, eclipse-like feature of Delta-m ~ 0.3 is coincident
with the center of the broad minimum.  There is flickering at all
phases of the lightcurve with an amplitude as great as 0.3 mag, as
well as 1-3 s quasiperiodic oscillations of 1.2 percent (rms) of
the stellar light.  The white light of E1013-477 is modulated with
a period of 103.43 +/- 0.06 min and an amplitude of ~ 0.8 mag with
flickering of amplitude as great as 0.6 mag superposed.  The optical
spectrum of both stars contains strong emission lines of H,
He I and Ca II.  The IUE spectrum of E1013-477 shows strong emission
lines of C IV and Si IV.  Both stars are excellent candidates
for optical polarization studies."


1982 April 1                   (3684)              Brian G. Marsden

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