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IAUC 4559: 1988G; X2127+119 AND PULSAR IN M15; 1986 III

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                                                  Circular No. 4559
Central Bureau for Astronomical Telegrams
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444

     Jean Mueller and Jeff Phinney, Palomar Observatory, report the
discovery of a supernova, mpg about 17-18, in an anonymous galaxy (R.A. =
13h28m25.7, Decl. = +32 10'31", equinox 1950.0), located 6".7 east and
3".3 south of the galaxy's center.  The measured position of the supernova
is R.A. = 13h28m25.1, Decl. = +32 10'26" (equinox 1950.0, accuracy
about 2").  The object was discovered on a Feb. 25 plate with the 1.2-m
Oschin Schmidt telescope in the course of the Sky Survey II.  A
low-dispersion spectrum, obtained by N. Reid, Palomar Observatory,
and G. Wegner, Dartmouth College, on Mar. 4 UT with the 5-m Hale
reflector (+ double spectrograph + CCD), shows the strong 614.0-nm
Si II feature characteristic of type-I supernovae, and the spectral
energy distribution suggests that the supernova is near maximum
light.  J. R. Mould derived the following magnitude and color with
the CCD camera on the Palomar 1.52-m reflector on Mar. 5: B about 15.8,
B-V about 0.0.

X2127+119 AND PULSAR IN M15
     M. Auriere, Pic du Midi Observatory; M. Geffert, Hoher List
Observatory; and L. Koch-Miramond, Astrophysics Laboratory, Institute
for Fundamental Research, Saclay, telex:  "The published position
of the radio pulsar in the direction of M15 (IAUC 4552) is 2".1
away from the Einstein satellite position for X2127+119 (Grindlay
et al. 1984, Ap.J. 282, L13).  Optical identification of X2127+119
with AC 211 (Ilovaisky et al. 1987, A.Ap. 179, L1) enables us to
give a refined position for it:  R.A. = 21h27m33.278, Decl. = +11 56'51.00
(equinox 1950.0, AGK3 system; accuracy +/- 0".25).   The published
position of the radio pulsar is thus 3".3 away from the M15 x-ray
source.  The accuracy of the radio position is needed in order to
conclude if a possible identification of the two objects can be
ruled out on astrometric grounds."

     S. Larson and D. Levy, Lunar and Planetary Laboratory, report
CCD photometry of P/Halley obtained Feb. 23.3 UT with the Catalina
1.5-m reflector (+ Gunn g filter):  m1 = 17.2 +/- 0.2 in an aperture
that included all of the 40"-diameter coma.   Levy estimated  m1 =
16.8 visually with the same telescope.

1988 March 7                   (4559)            Daniel W. E. Green

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