Central Bureau for Astronomical Telegrams

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IAUC 8306: N Sgr 2004; IRAS 05436-0007

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                                                  Circular No. 8306
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


NOVA SAGITTARII 2004
     The Central Bureau has received word of the discovery of a
possible nova independently by Hideo Nishimura (Kakegawa, Shizuoka-
ken, Japan; via S. Nakano, Sumoto, Japan) and by William Liller
(Vina del Mar, Chile).  Nishimura reported the position of the new
object (mag 9.4) as R.A. = 18h19m28s, Decl. = -28o35'34" (equinox
2000.0) from two Fuji T-Max films taken around Mar. 15.82 UT with a
Pentax 200-mm f/4 lens; nothing was visible at this location on his
patrol films taken on Mar. 12.82 (limiting mag 10.5).  Liller found
the new star at mag about 8.2 on two Technical Pan films taken with
an 85-mm Nikon camera lens (+ red filter) on Mar. 17.342 and 17.346,
providing the position as R.A. = 18h19m.6, Decl. = -28o35'; he adds
that nothing is visible at this position on his exposures taken on
Feb. 26.38 (limiting mag 11.0).  Following requests by the Central
Bureau and the AAVSO, D. West (Mulvane, KS) obtained a CCD image
showing the apparent nova at V = 8.38 +/- 0.07 on Mar. 17.489,
providing the following precise position:  R.A. = 18h19m32s.29,
Decl. = -28o36'35".7.  West adds that nothing is visible at this
location on a red Digitized Sky Survey image (limiting mag
approximately 17.5).  Visual magnitude estimates, provided in part
by E. Waagen, AAVSO:  Mar. 17.556, 8.1 (R. Royer, Springville, CA);
17.631, 8.5 (J. Bedient, Honolulu, HI); 17.821, 8.7 (A. Pearce,
Nedlands, W. Australia).


IRAS 05436-0007
     D. K. Ojha, N. Kusakabe, and M. Tamura, National Astronomical
Observatory, Tokyo, report on observations made at the Infrared
Survey Facility 1.4-m telescope at the South African Astronomical
Observatory.  The 'JHK_s-band simultaneous camera' (SIRIUS) was
used to obtained the following magnitudes (aperture radius about
8") for the near-infrared counterpart to IRAS 05436-0007 (cf. IAUC
8284):  Feb. 23 UT, J = 10.81, H = 8.96, K_s = 7.41; Feb. 29, J =
10.92, H = 9.12, K_s = 7.62.  The cometary infrared nebula is
clearly seen extending toward the north from the near-infrared
source.  The nebula is blue (bright in J) and has a cavity
structure with two rims extending toward the northeast and the
northwest.  The northeast rim, which can be traced out to about
30", is brighter and sharp compared to the diffuse northwest rim.

                      (C) Copyright 2004 CBAT
2004 March 17                  (8306)            Daniel W. E. Green

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