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IAUC 5156: 1987A; 1990g

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IAUC number 

                                                  Circular No. 5156
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     R. Cumming and P. Meikle, Imperial College, London; and J.
Spyromilio and D. Allen, Anglo-Australian Observatory, report
"Echelle spectroscopy (resolution 40 000) of the circumstellar
H-alpha emission from SN 1987A was performed at the Anglo-Australian
Telescope on 1990 Dec. 22.  A broad pedestal with FWHM about
150 km/s has appeared beneath the strong, narrow line (FWHM 30
km/s) and contributes about 30 percent of the line flux.  There is
no broad component to the neighboring [N II] emission, and similar
spectra taken 53 days earlier (in better seeing) show no pedestal
to any of the three lines.  Preliminary analysis of spatially-separated
spectra indicates that the broad component is strongest 1" east of
the supernova.  If the pedestal arises from interaction of the
fast-moving ejecta with circumstellar material shed by the
progenitor then it may evolve rapidly."


COMET McNAUGHT-HUGHES (1990g)
     Extension of ephemeris on IAUC 5108:

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Jan.  4    16 10.79    -20 26.0    3.449    2.742    16.1
          14    16 14.93    -18 41.8
          24    16 17.81    -16 40.5    3.104    2.706    15.8
     Feb.  3    16 19.06    -14 16.8
          13    16 18.20    -11 24.0    2.699    2.685    15.4
          23    16 14.66    - 7 54.1
     Mar.  5    16 07.73    - 3 38.8    2.291    2.681    15.1
          15    15 56.65    + 1 28.6
          25    15 40.65    + 7 27.5    1.971    2.694    14.8
     Apr.  4    15 19.32    +14 02.7
          14    14 52.96    +20 40.0    1.851    2.722    14.7
          24    14 23.09    +26 34.1
     May   4    13 52.38    +31 10.1    1.990    2.766    14.9
          14    13 23.73    +34 17.8
          24    12 59.31    +36 08.7    2.325    2.825    15.3
     June  3    12 40.02    +37 03.6
          13    12 25.73    +37 21.9    2.747    2.897    15.8


1991 January 7                 (5156)             Daniel W. E. Green

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