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IAUC 3899: V0332+53; V1727 Cyg; SN IN NGC 3227

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IAUC number 

                                                  Circular No. 3899
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM     Telephone 617-864-5758


V0332+53
     R. W. Argyle, Royal Greenwich Observatory, telexes that the
astrometric position given on IAUC 3897 was measured by P. Eldridge
on a plate taken by D. L. King with the 0.66-m refractor.

     R. K. Honeycutt and E. M. Schlegel, Indiana University,
telex: "Candidates for the optical counterpart of V0332+53 (cf.
IAUC 3891, 3893) were examined on Nov. 27 and 28 using the image-
dissector-scanner spectrometer on the 2.1-m telescope at Kitt Peak
National Observatory.  Spectra at 0.25-nm resolution over the
range 425-495 nm were obtained for six stars brighter than B = 18
within 2' of the x-ray position.  All stars showed undistinguished
late-type spectra, except for a heavily reddened OB star at R.A. =
3h31m14s9, Decl. = +53deg00'29" (equinox 1950.0; position from Palomar
Sky Survey print; uncertainty 4"); the error circles of the EXOSAT
x-ray position, infrared candidate and this optical candidate just
overlap.  The candidate's mean B magnitude was 16.7 +/- 0.1 on both
Nov. 27 and 28.  No brightness variations were apparent at 5-min
time resolution over the two 40-min spectrophotometric sequences
obtained on the two nights.  The spectrum shows strong interstellar
443-nm, He I in absorption, and weak emission at H-beta and
H-gamma.  If this optical identification is correct, the source appears
to be a massive x-ray binary similar to Cyg X-1."


V1727 CYGNI
     W. Wenzel, Sonneberg Observatory, telexes that another quiescent
state (cf. IAUC 3887), at mpg = 18, of this object is evident
on Sonneberg plates between 1938 July and 1943 Nov.  Large
fluctuations, between mag 16.8 and 18.2 with period 5.2 hr, are present
between 1963 June and 1978 Sept.


SUPERNOVA IN NGC 3227
     G. Massone, Pino Torinese Observatory, telexes that this
object (IAUC 3887, 3892) was at mpg = 15.2 on Dec. 3.13 UT.  He
has measured the following position from exposures with the new
0.38-m photographic refractor: R.A. = 10h20m45s58, Decl. = +20deg07'07"0
(equinox 1950.0).  The corresponding positions for the nuclei of
NGC 3227 and NGC 3222 were R.A. = 10h20m46s76, Decl. = +20deg07'05"7 and
R.A. = 10h20m43s14, Decl. = +20deg09'05"8, respectively.


1983 December 13               (3899)              Brian G. Marsden

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