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IAUC 5980: GRO J0422+32; N Cas 1993; LUMINOUS RED Var IN Sgr; 1994d

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                                                  Circular No. 5980
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)


GRO J0422+32
     J. M. Bonnet-Bidaud, Centre d'Etudes Nucleaires de Saclay; and
M. Mouchet, Observatoire de Meudon, report:  "Optical spectra of
this object obtained at the Canada-France-Hawaii 3.6-m telescope on
Feb. 4.28-4.36 UT confirm that the source has returned to a
quiescent phase following successive optical outburts (IAUC 5974,
5967, 5929).  The fully-calibrated spectrograms (range 320-1000 nm,
resolution 1 nm), obtained under subarcsecond seeing conditions,
show that the strong, broad Balmer lines are now observed in
emission, typical of the quiescent phase of x-ray novae.  Emission
due to He II 468.6-nm (IAUC 5907) has disappeared.  Measurements of
the H-alpha (656.2 nm) and H-beta (486.1 nm) lines give intensities
(10E-16 erg cmE-2 sE-1), equivalent widths (nm), and FWHM (km/s) of
7.64 +/- 0.17, 7.7 +/- 0.2, 1600 +/- 50 and 3.5 +/- 1.0, 4.1 +/-
1.2, 1780 +/- 400, respectively.  The H-alpha line exhibits a
variable double-peaked shape, similar to that observed for V404 Cyg
and A0620-00, with a width that seems to indicate a rather inclined
system.  Preliminary analysis of the spectra show that the
absorption lines from the secondary are only barely detectable,
indicating a still-substantial contribution of the accretion disc."


NOVA CASSIOPEIAE 1993
     Further visual magnitude estimates (cf. IAUC 5978): Apr. 21.07
UT, 13.5 (L. Szentasko, Veresegyhaz, Hungary; correction to
observation of same date on IAUC 5978, which was actually for the
peculiar variable in Sgr noted on IAUC 5976, and not for N Cas
1993); 23.06, 13.7 (T. Vanmunster, Landen, Belgium); 23.90, [13.3
(Vanmunster).


LUMINOUS RED VARIABLE IN SAGITTARIUS
     W. Wenzel, Sonneberg Observatory, reports that this object
(cf. IAUC 5949) is not visible on 561 Sonneberg sky patrol plates
taken during 1926-1983 (limiting photographic magnitude 11-13.5).


COMET SHOEMAKER-LEVY (1994d)
     Total visual magnitude estimates:  Apr. 7.83 UT, 15.0 (H.
Mikuz, Ljubljana, Slovenia, 0.20-m Baker-Schmidt camera + V filter
+ CCD); 11.21, 13.3 (C. S. Morris, Pine Mountain Club, CA, 0.26-m
reflector).


1994 April 27                  (5980)            Daniel W. E. Green

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