Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7599: S/2001 (107) 1; 2001ae; V4643 Sgr

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).

Read IAUC 7598 SEARCH Read IAUC 7600

View IAUC 7599 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7599
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)


S/2001 (107) 1
     A. Storrs, Towson University; and the Hubble Space Telescope
(HST) Asteroid Team (F. Vilas, R. Landis, E. Wells, C. Woods, B.
Zellner, and M. Gaffey) report the discovery of an apparent
companion to (107) Camilla in HST images made during Mar. 1.242-
1.252 UT.  Five images show a companion at p.a. 261 deg and
separation 0".6.  The companion has the same colors as (107).
Preliminary determination of the magnitude difference between the
two is 7.0 +/- 0.1, implying a 1:25 ratio of diameters.


SUPERNOVA 2001ae IN IC 4229
     T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
2001ae (cf. IAUC 7597), obtained by P. Berlind on Mar. 17.42 UT
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST
spectrograph), shows it to be a type-II supernova.  The spectrum
consists of a blue continuum with superposed P-Cyg lines of
hydrogen.


V4643 SAGITTARII
     N. M. Ashok, Anandmayee Tej, and D. P. K. Banerjee, Physical
Research Laboratory (PRL), Ahmedabad, report spectroscopy of V4643
Sgr (N Sgr 2001) at 1.08-2.175 microns with the Mt. Abu 1.2-m
telescope (+ PRL Near Infrared Imaging Spectrometer + HgCdTe
NICMOS3 detector array) on Mar. 3.0 UT:  "The spectra show strong
H I emission lines at Paschen-beta, Paschen-gamma, and Brackett 10
to 14.  Surprisingly, the H I Brackett-gamma line is not seen in
emission.  The Paschen-beta and Brackett-10 lines clearly show a
structure with broad wings.  Also prominent is the emission line at
1.1277 microns due to O I, flanked by two components on either side.
An emission feature is seen at 1.695 microns, attributable to He I.
The large expansion velocities (FWZI about 10 000 km/s for the
Paschen-beta line) and the presence of the He I line at 1.695
microns support the identification of this nova with the He/N
spectroscopic class by Della Valle et al. (IAUC 7594)."
     Visual magnitude estimates:  Mar. 2.810 UT, 10.7 (A. Pearce,
Nedlands, W. Australia); 3.826, 10.9 (Pearce); 4.828, 10.9
(Pearce); 5.830, 11.2 (Pearce); 14.625, 11.4 (J. Bedient, Honolulu,
HI); 15.856, 11.8 (Pearce).

                      (C) Copyright 2001 CBAT
2001 March 19                  (7599)            Daniel W. E. Green

Read IAUC 7598 SEARCH Read IAUC 7600

View IAUC 7599 in .dvi or .ps format.

Our Web policy. Index to the CBAT/MPC/ICQ pages.

Valid HTML 4.01!