THE ASTRONOMER Electronic Circular No 788 1993 Nov 14 13.04UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074
TELEX: 9312111261 Answerback: TA G TELECOM GOLD: 10074:MIK2885
GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH
GMH at UK.AC.CAM.ASTRONOMY.STARLINK STARLINK: CAVAD::GMH
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SUPERNOVA 1993ad IN IC 1501
C. Pollas, Observatoire de la Cote d'Azur, reports his discovery of
a supernova of mag B = 18 on two films taken Nov. 7.87 and 8.88 UT.
The object is located at R.A. = 23h32m06s.75, Decl. = -3o26'08".5
(1950), which is 13" east and 22".7 south of the nucleus of the
spiral host galaxy. Nothing was found at this position to mag 20
on films taken Oct. 20.88 and to mag 21 on Aug.19.09. A nearby
star is at end figures 12s.89, 23'52".8. E.Cappellaro and M. Della
Valle, European Southern Observatory, report: "A flux-calibrated
CCD spectrogram (range 380-680 nm, resolution about 1 nm), obtained
on Nov. 10.1 UT with the 3.6-m reflector (+ EFOSC) at La Silla,
shows this object to be a type-II supernova at a very early stage.
Preliminary analysis reveals emission lines of the Balmer series
from H-alpha to H-epsilon superimposed on a very blue continuum.
Other emission lines are measured at 462, 476 (likely He II 468.6),
and 590 nm. All features are narrow (FWHM about 1500 km/s). The
spectrum bears strong similarity to that of SN 1983K ten days
before maximum (Niemela et al. 1985, Ap.J. 289, 52). Provisional
photometry gives B = 16.3, B-V = -0.3, V-R = 0.0. The H-alpha
emission of the galaxy gives a redshift of z about 0.018."
IAUC 5887
SUPERNOVA 1993ae IN UGC 1071
C. Pollas, Observatoire de la Cote d'Azur, reports his discovery of
a supernova of mag V = 16.5 on two films taken Nov. 7.92 and 7.97
UT. The object is located at
R.A. = 1h27m16s.08, Decl. = -2o14'05".5 (equinox 1950.0); the
galaxy's center is located at end figures 15s.00, 29".9. Nothing
was found at this position to mag 21.5 on films taken Oct. 20.07
and 20.11. A nearby star (V about 14) is at end figures 15s.42,
15'24".6.
E. Cappellaro, European Southern Observatory; and A. Bragaglia,
Osservatorio Astronomico di Bologna, report: "On Nov. 11.2 UT, we
obtained a spectrogram (range 340-910 nm, resolution 7 nm) of SN
1993ae, using the ESO 1.5-m telescope and the Boller & Chivens
spectrograph. The spectrum is very similar to that of a normal
type-Ia supernova about 10 days after maximum. In particular,
strong absorptions are measured at 386.2, 452.4, 519.5, 580.8, and
626.5 nm. The last of these, attributed to Si II 635.5 nm,
indicates an expansion velocity of about 10 000 km/s."
IAUC 5888
V795 CYGNI
Patrick Schmeer, Germany e-mails that he has observed an outburst
of this UG star as follows:
1993 Nov 3.772UT, 13.1v (0.20-m T)
The outburst has been confirmed as follows:
1993 Nov 3.815UT, 13.0v (Paul Van Cauteren, Belgium, 0.25-m refl)
Nov 4.95, 13.0v (Tonny Vanmunster, Belgium, 0.35-m refl)
AK CANCRI
Bill Worraker, Didcot, UK reports that AK Cnc (UG-type) is
undergoing a rare outburst:
1993 Nov 11.236UT, 14.0v (0.26-m reflector)
Gary Poyner, Birmingham, UK reports confirmation:
1993 Nov 12.113UT, 14.2v (0.40-m reflector)