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IAUC 7796: PECULIAR Var IN Mon; IM Nor

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                                                  Circular No. 7796
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


PECULIAR VARIABLE IN MONOCEROS
     T. R. Geballe, Gemini Observatory; S. P. S. Eyres, University
of Central Lancashire; and A. Evans and V. H. Tyne, Keele
University, report observations of this object (cf. IAUC 7785,
7786, 7791), made at the U.K. Infrared Telescope (+ CGS4) at about
Jan. 12.33 UT in nonphotometric conditions and at resolutions of
0.00125 and 0.0025 micron at 1.03-1.34 and 1.45-2.52 microns,
respectively:  "The spectrum shows a number of remarkable
characteristics, including broad and shallow water bands at 1.4 and
1.9 microns; deep CO bands longward of 2.29 microns; hydrogen
Brackett series lines in absorption, with the strongest absorptions
occurring in the H band for transitions with n(upper) about 14; and
numerous strong lines of neutral metals (principally Mg, Si, and
Fe) in the J band.  Many of the metal lines have P-Cyg profiles,
implying outflow velocities of several hundred km/s.  The hydrogen
lines do not show P-Cyg profiles.  The continuum flux density
decreases with wavelength and is consistent with the Rayleigh-Jeans
falloff of a late-type star, with no indication of emission from
hot dust.  Rough infrared magnitudes are J = 7.0, H = 6.5, K = 6.3.
The overall impression is of a cool, extended, and expanding
atmosphere.  Continued monitoring at infrared wavelengths is urged;
higher spectral resolution is needed to resolve better the line
profiles."
     S. Kimeswenger and C. Lederle, University of Innsbruck, report
that 163 CCD frames were obtained with the Innsbruck 0.60-m
telescope during Jan. 14.840-17.855 UT, showing no signature of a
periodic variability in this variable star.  Magnitudes (+/- 0.015):
Jan. 14.886, B = 11.634, V = 9.802, R = 8.886, I_c = 7.998; 15.864,
11.733, 9.845, 8.935, 8.020; 17.838, 11.856, 9.955, 8.988, 8.057.


IM NORMAE
     G. J. Garradd, Loomberah, N.S.W., reports a precise position
from an unfiltered CCD image taken with a 0.45-m reflector on Jan.
17.715 UT:  R.A. = 15h39m26s.465, Decl. = -52o19'17".99 (equinox
2000.0; uncertainty about 0".1 in each coordinate; about 300 UCAC
reference stars used), mag 10.5.  Additional magnitude estimates
(visual unless noted otherwise):  2001 Aug. 23, [14.5 (N. J. Brown,
Quinns Rocks, W. Australia); Dec. 22.8, [10.4 (Brown; T-Max 400
film); 2002 Jan. 12.803, 8.3 (A. Pearce, Nedlands, W. Australia);
13.800, 8.3 (Pearce); 15.799, 8.2 (Pearce); 16.341, 7.66 (W.
Liller, Vina del Mar, Chile; CCD broadband V; fog); 16.783, 8.7
(Pearce); 17.163, 8.9 (A. Amorim, Florianopolis, Brazil); 19.253,
8.9 (R. Shida, Sao Paulo, Brazil).

                      (C) Copyright 2002 CBAT
2002 January 19                (7796)            Daniel W. E. Green

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