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IAUC 4036: NGC 4151; RS Oph; RZ Leo; NGC 2346

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IAUC number 

                                                  Circular No. 4036
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 617-495-7244/7440/7444


NGC 4151
    B. M. Peterson, Department of Astronomy, Ohio State University,
writes: "Optical spectra of NGC 4151, obtained Jan. 20 and 21 with
the OSU image-dissector scanner, reveal that the broad-line component
of the permitted lines has re-emerged after nearly vanishing
in 1984 Apr. (Penston and Perez 1984, MNRAS 211, 33P).  The optical
continuum has also increased in brightness, and from our spectra we
estimate V = 12.47 through a 7" aperture centered on the nucleus."


RS OPHIUCHI
     D. Laney, South African Astronomical Observatory, communicates
that infrared photometry obtained with the 0.75-m reflector on Feb.
4.15 UT yielded J = 4.06, H = 3.91, K = 3.31, L = 2.66.  These
measurements indicate a strong flux in the J band, possibly due to He
I 1083-nm, as well as a dust excess at longer wavelengths.

     S. Padin, R. J. Davis, and M. Bode, Jodrell Bank, report
detection of RS Oph at 4.9 GHz with the new 400-MHz-bandwidth Mk IA/
Mk II interferometer: "A flux density of 18 +/- 2 mJy was measured on
Feb. 13.458 UT within our position limits of +/- 2" in R.A. and +/- 4" in
Decl.  Further observations on Feb. 15 indicate an increase in flux
density is occurring."

     Further visual magnitude estimates:  Jan. 22.25 UT, 10.6 (S.
Lubbock, St. Brides Major, S. Wales); 31.48, 6.5 (R. King, Duluth,
MN); Feb. 1.49, 6.6 (D. Weier, Madison, WI); 2.43, 6.7 (J. Riggs,
Buffalo, NY); 3.54, 7.1 (R. Ducoty, Capitola, CA); 4.76, 7.1 (R. H.
McNaught, Coonabarabran, NSW); 5.75, 7.4 (McNaught); 6.58, 7.6 (L.
Cook, Concord, CA); 8.76, 7.4 (McNaught); 10.77, 7.6 (McNaught);
12.78, 7.7 (McNaught); 14.74, 7.9 (McNaught).


RZ LEONIS
     Visual magnitude estimates by McNaught (cf. IAUC 4026, 4027):
Jan. 18.62 UT, 14.8:; 19.73, [15.5.


NGC 2346
     Visual magnitude estimates of the central star (cf. IAUC 4024)
by M. Verdenet, Bourbon-Lancy, France: Jan. 20.84 UT, 14.3; 24.89,
14.8; 27.75, 13.8.


1985 February 19               (4036)            Daniel W. E. Green

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