IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7706: N Sgr 2001 No. 3; C/2001 A2; 2001ee

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 7705  SEARCH Read IAUC 7707

View IAUC 7706 in .dvi or .ps format.
IAUC number


                                                  Circular No. 7706
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)


NOVA SAGITTARII 2001 No. 3
     Independent discoveries of an apparent new nova have been
received from A. J. S. Pereira, Carnaxide, Portugal, and from W.
Liller, Vina del Mar, Chile.  Pereira's visual discovery was made
on Sept. 5.846 UT with 14x100 binoculars, when he estimated the
object's magnitude as 7.0 and noted its strong orange color; Liller
found the object at mag 10.0 on a pair of Kodak Technical Pan
photographs taken through an orange filter on Sept. 3.979, with a
confirming CCD image on Sept. 6.039 showing the star at broadband V
= 7.27 (through clouds).  Liller provides the following position
for the nova:  R.A. = 18h11m45s.82 +/- 0s.06, Decl. = -30o30'49".9
+/- 2".1 (equinox 2000.0).  Pereira notes that nothing was seen at
this position to m_v about 8.5 on Sept. 4.8, and to mag 8.0-8.5 on
Sept. 1.8 and 2.8.  Liller adds that a low-dispersion CCD prism
spectrogram obtained of the new nova through clouds shows a strong
continuum and only weak H-alpha emission estimated to be 20 percent
brighter than the surrounding continuum.  A. Hale, Cloudcroft, NM,
reports that a CCD image taken on Sept. 6.1 yields position end
figures 46s.01, 50".9.  Additional visual magnitude estimates:
Sept. 5.868, 7.0 (Pereira); 5.880, 6.9 (Pereira); 5.898, 7.0
(Pereira); 5.904, 6.8 (Pereira); 5.928, 6.9 (Pereira); 6.026, 6.9
(D. W. E. Green, Carlisle, MA); 6.13, 7.0 (Hale).


COMET C/2001 A2 (LINEAR)
     A. Lecacheux, Observatoire de Paris, on behalf of the Odin
Team (http://www.snsb.se/Odin/Odin.html), reports:  "The H_2O
110-101 line at 556.936 GHz was observed in C/2001 A2 with high
spectral resolution (54 m/s) with the ODIN submillimeter space
telescope from June 20 until July 12.  From a preliminary analysis,
10' x 10' mapping made during July 1.5-2.4 UT shows that the H_2O
coma is elongated along the comet-sun line; the integrated line
intensity inside the 2' beam peaks at 12 K km s**-1, on the main-
beam brightness temperature scale.  The line width indicates an
H_2O outflow velocity of 0.7 km/s.  The estimated water-production
rate for July 1.7-2.0 is 3.8 x 10**28 molecules/s."


SUPERNOVA 2001ee IN NGC 2347
     On IAUC 7705, lines 3-4, it was meant that M. Armstrong
employed the same program procedures and instrumentation details
that T. Boles employed for SN 2001eb.

                      (C) Copyright 2001 CBAT
2001 September 6               (7706)            Daniel W. E. Green

Read IAUC 7705  SEARCH Read IAUC 7707

View IAUC 7706 in .dvi or .ps format.


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


Valid HTML 4.01!