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IAUC 2971: 1963 UA; 1976e; OPTICAL CANDIDATES FOR A0353-40 AND A0535+26

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IAUC number 

                                                  Circular No. 2971
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK
Western Union: RAPID SATELLITE CAMBMASS


1963 UA
     E. Roemer, University of Arizona, reports that she has recovered
this object on plates taken with the Steward Observatory's
229-cm reflector, Kitt Peak, as shown below.  C. A. Heller assisted
on June 5, L. M. Vaughn on June 26 and 27.  The indicated correction
to the prediction on IAUC 2941 is Delta-T = -0.035 day.

     1976 UT          R. A. (1950) Decl.      Mag.
     June  5.36183   22 43.68    + 5 44.0    ~19.3
          26.37216   23 29.12    +11 33.1    ~19.6
          26.39259   23 29.16    +11 33.4
          27.40851   23 31.50    +11 50.9


PERIODIC COMET D'ARREST (1976e)
     Selected total visual magnitude estimates: June 28.12 UT, 11.9
(J. Bortle, Brooks Observatory, 32-cm reflector); July 1.19, 11.0
(C. S. Morris, Boalsburg, Pennsylvania, 15-cm reflector); 3.14,
11.5 (Bortle); 4.23, 11.1 (Morris); 5.24, 11.3 (Bortle); 6.29, 11.0
(S. O'Meara, Harvard College Observatory, 23-cm refractor).


OPTICAL CANDIDATES FOR A0353-40 AND A0535+26
     D. R. Soderblom, Lick Observatory, reports that coude spectrograms
(range 5800-6800 A, dispersion 34 A/mm) obtained with the 305-cm
reflector show that star 1 in NGC 5367 (Van Till et al. 1975,
Astrophys. J. 198, 235), the diffuse reflection nebula close to the
error box for the x-ray source A0353-40 (Cooke 1976, Nature 261,
564), exhibits strong H-alpha emission peaks at ~ -160 and ~ +70 km/s
and a pronounced central absorption at ~ -60 km/s   No other stellar
or interstellar lines are apparent, and there are no peculiar
features in the spectrum of NGC 5367 star 2.  Similar observations
of the Be star DD +26 883 = HDE 245770, the suggested optical counterpart
of A0535+26 (IAUC 2780, 2784), show very strong H-alpha emission
(FWHM ~ 300 km/s) centered at ~ -32 km/s, a slight reversal at ~
+42 km/s and no stellar absorption lines.  The B-V color (IAUC
2790), together with the reddening value derived from the diffuse
interstellar features at 5780 and 5797 A, confirm that the star is
of spectral type O or early B.  Both BD +26 883 and NGC 5367 star 1
would bear close spectral examination at shorter wavelengths.


1976 July 7                    (2971)              Brian G. Marsden

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