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IAUC 2835: A0620-00; N Aql 1975; N Sct 1975

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IAUC number 

                                                  Circular No. 2835
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


A0620-00
     H. French, University of California at Santa Cruz, reports the
following photoelectric observations, obtained with the No. 4 40-cm
telescope at Kitt Peak National Observatory on Aug. 26 UT: V =
11.20 +/- 0.04, B-V = +0.21 +/- 0.04, U-B = -0.76 +/- 0.06.

     K. Locher, Grut-Wetzikon, Switzerland, provides a further
visual magnitude estimate (cf. IAUC 2823): Sept. 6.13 UT, 11.3.

     J. F. Dolan, Warner and Swasey Observatory, communicates the
following polarization measurements, obtained using the Kitt Peak
visual polarimeter: in U, 1.61 percent in p.a. 138o.4; in B, 1.67
percent in 140o.6; in V, 1.71 percent in 142o.4.  Standard deviations
are 0.2 percent and 3o.  The polarization is interstellar in magnitude,
position angle and wavelength dependence.  This result neither
supports nor contradicts the proposed coincidence of the optical
and the x-ray source, but if they are the same, it rules out a
synchrotron process as the source of the optical radiation.

     S. Wyckoff and P. A. Wehinger, Wise Observatory, report that
on Sept. 3.1 UT the spectrum (dispersion 240 A/mm) showed a
featureless, predominantly blue continuum extending from 3200 to 8400 A.


NOVA AQUILAE 1975
     P. Pesch, Warner and Swasey Observatory, reports that an
objective-prism plate taken by him on Sept. 7 UT with the Burrell
Schmidt telescope shows that the spectrum of the object initially
described as an eruptive variable in Aquila (IAUC 2788, 2795, 2802),
and then as Nova Aql 1975 (IAUC 2811, 2821), is indeed that of a
nova.  According to N. Sanduleak and P. Chen, the nova is now in
its early nebular stage.  Coverage of the 4500-6800 A region shows
strong H-alpha (somewhat narrower than observed in most novae) and weak
emission features identified as [N II] 5755 A and [O III] 5007 A.


NOVA SCUTI 1975
     Further selected visual magnitude estimates: Aug. 17.98, 10.3
(U. Surawski, Wilhelm Foerster Observatory); 19.10, 10.5 (J. Bortle,
Brooks Observatory); 23.1, 10.9 (Bortle); 28.15, 10.6 (Bortle);
31.11, 10.2 (C. Sherrod, North Little Rock, Arkansas); Sept. 2.10,
10.4 (Sherrod); 9.11, 10.8 (Sherrod); 12.06, 11.2 (Sherrod).


1975 September 12              (2835)              Brian G. Marsden

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