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IAUC 5863: N Sgr 1993; GRO J0422+32

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                                                  Circular No. 5863
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)


NOVA SAGITTARII 1993
     M. Della Valle, European Southern Observatory; and S. Cristiani
and C. Lissandrini, Dipartimento di Astronomia, Universita di Padova,
report:  "Analysis of spectrograms (range 370-900 nm, resolution
about 0.8-3 nm), obtained on Sept. 16.97 UT with the ESO/MPI 2.2-m
telescope (+ EFOSC2) at La Silla, confirms this object (cf. IAUC
5862) as being a nova, caught a few days past maximum.  The spectrum
shows emission lines of H, Fe II (mult. 42, 49, 55, 73, 74), Na I
(589 nm), and O I (mult. 1, 4, 34).  The emission line of Na I is
flanked by a clear, blue-shifted P-Cyg profile.  The expansion
velocity derived from the minimum of the P-Cyg absorption and the FWHM
of H-alpha is about 2400 km/s."
     P. M. Kilmartin reports the following precise position from an
exposure obtained by A. C. Gilmore at Mt. John University Observatory
on Sept. 17.338 UT:  R.A. = 18h09m38s.40, Decl. = -29 29'54".0
(equinox 1950.0).  Gilmore also provides the following photometry,
obtained in marginal conditions with a 0.6-m f/16 Cassegrain telescope
(+ Johnson-Cousins UBVRcIc filters):  Sept. 17.414, V = 8.59
+/- 0.00, U-B = -0.26 +/- 0.05, B-V = +0.33 +/- 0.00, V-R = +0.42
+/- 0.01, V-I = +1.00 +/- 0.12; 17.434, 8.57 +/- 0.02, -0.30 +/-
0.01, +0.35 +/- 0.01, +0.40 +/- 0.01, +0.96 +/- 0.04.


GRO J0422+32
     G. Beskin, S. Kajsin, S. Neizvestny, I. Panferova, V.
Plokhotnichenko, A. Tikhonov, A. Ugrumov, and A. Zhuravkov, Special
Astrophysical Observatory (SAO); and C. Bartolini, G. Cosentino, A.
Guarnieri, and A. Piccioni, University of Bologna, communicate:
"Photoelectric and spectroscopic observations from Sept. 9 to 12,
obtained at the 6-m SAO telescope (+ Mania complex), confirm that
GRO J0422+32 is in a very low state, as indicated by the following
Johnson photometry:  Sept. 10.02 UT, V = 18.17 +/- 0.07, B = 19.32
+/- 0.30, R = 17.50 +/- 0.25; 10.94, 18.19 +/- 0.08, 19.67 +/- 0.24,
-; 12.03, 18.99 +/- 0.10, 19.99 +/- 0.20, 18.25 +/- 0.20 (1-m SAO
telescope).  Five spectrograms show only a continuum in the range
400-500 nm, with weak H-alpha in the range 500-600 nm.  Perhaps the
rapid fading reported by Filippenko and Matheson (IAUC 5860) is an
indication that the drop observed by Bartolini et al. (IAUC 5690)
is recurrent."


1993 September 17              (5863)            Daniel W. E. Green

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