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IAUC 5897: 1993af, 1993ag, 1993ah; 1993r

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                                                  Circular No. 5897
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


SUPERNOVAE 1993af, 1993ag, 1993ah
     The European Southern Observatory/European Union student visitors'
group to the La Silla Observatory (M. Bieglmayer, Austria; N. Debry,
Belgium; A. Dondelinger, Luxembourg; C. Ferrigno, Italy; T. R. Greve,
Denmark; N. E. Haugen, Norway; T. Honohan, Ireland; J. V. Kahanpaa,
Finland; L. H. Kourtis, Greece; N. Leterrier, France; S. Mario del
Fresno, Spain; C. R. B. Miller, U.K.; T. Moska, Sweden; J. P. de
Carvalho Saraiva, Portugal; S. Schuh, Germany; U. N. Shimron, The
Netherlands; E. Valenzuela, Chile; and M. Zavadsky, Switzerland) reports
photometric observations with the 0.9-m Dutch telescope (CCD, standard B
and V, +/- 0.1 mag) and spectroscopic observations with the 3.5-m New
Technology Telescope (EMMI, 500-750 nm, resolution 0.3 nm) of the
supernovae mentioned on IAUC 5895.  1993af.  On Nov. 25.4 UT, B = 16.7,
V = 16.6, B-V = +0.1.  A 20-min spectrum on Nov. 27.3 showed this to be
a type Ia supernova, 3-4 months after maximum, the age indicating that
it is about 4.5 mag fainter than at maximum.  1993ag.  On Nov. 25.4, B
= 18.1, V = 17.9, B-V = +0.2.  A 30-min spectral exposure on Nov. 27.4
showed this supernova to be of type Ia, about 1 week after maximum.  A
preliminary measurement of the expansion velocity, as deduced from the
minimum of Si II absorption, gives approximately 11 000 km/s.  The
redshift of the host galaxy, as measured from the Mg I absorption at
517 nm, is about 0.07.  1993ah.  On Nov. 25.1, B = 17.2, V = 16.4. B-V
= +0.8.  This supernova is situated in the outskirts of the central
dustlane in the Sombrero-type galaxy ESO 471-G27.  A 20-min spectrum on
Nov. 27.1 showed it to be of type Ia, similar to SN 1981B about 2-3
weeks after maximum.  The expansion velocity, derived from the minimum
of the Si II line, is about 13 000 km/s.


PERIODIC COMET SPITALER (1993r)
     Continuation to the ephemeris on IAUC 5885:

1993/94     R. A. (2000) Decl.     Delta      r    Elong. Phase      m1
Nov. 29     1 23.96    +13 30.5    1.351    2.182  137.4   17.8     17.0
Dec.  9     1 24.74    +13 50.9    1.421    2.167  127.6   21.1     17.1
     19     1 28.71    +14 24.7    1.504    2.155  118.6   23.6     17.2
     29     1 35.69    +15 11.5    1.597    2.146  110.3   25.5     17.3
Jan.  8     1 45.34    +16 09.3    1.696    2.139  102.6   26.7     17.4
     18     1 57.36    +17 16.1    1.801    2.135   95.6   27.3     17.6
     28     2 11.44    +18 29.1    1.910    2.133   89.0   27.5     17.7


1993 November 27               (5897)              Brian G. Marsden

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