Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 7311: LEONID METEORS 1999; 1999ez, 1999fa, 1999fb, 1999fc, 1999fd, 1999fe

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 7310 SEARCH Read IAUC 7312

View IAUC 7311 in .dvi or .ps format.
IAUC number 

                                                  Circular No. 7311
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


LEONID METEORS 1999
     A pronounced peak in Leonid meteor activity occurred for about
an hour centered on about Nov. 18d02h05m UT, agreeing very closely
with predictions by Asher (1999, MNRAS 307, 919) and McNaught and
Asher (1999, WGN 27, 85), which in turn suggest that the observed
activity represents debris ejected from comet 55P/Tempel-Tuttle
three revolutions ago.  G. M. Hurst, Basingstoke, England, forwards
a report from J. Mason that observations by members of the British
Astronomical Association located north of Sharm El Sheikh, Egypt,
revealed as many as 50 Leonids/min for a few minutes around the
peak.  Numerous other visual reports from observers in Jordan,
Israel, Spain, and Portugal give similar results, as do data from
radar monitoring by P. Pridal and R. Stork (Ondrejov) and radio
monitoring by K. Suzuki (Toyokawa, Japan) and C. Steyaert (Mol,
Belgium).


SUPERNOVAE 1999ez, 1999fa, 1999fb, 1999fc, 1999fd, 1999fe
     S. Fabbro, P. Astier, and R. Pain, Laboratoire de Physique
Nucleaire et des Hautes Energies, and Universites Paris VI et VII;
C. Veillet, Canada-France-Hawaii Telescope (CFHT); B. Frye,
Lawrence Berkeley National Laboratory; I. Hook, Royal Observatory,
Edinburgh; B. Schaefer, Yale University; and A. Kim, College de
France, on behalf of the Supernova Cosmology Project (cf. IAUC
7128, plus P. Astier, D. Hardin, K. Schahmaneche, J. M. Levy, C.
Balland, M. Mouchet, G. Blanc, J. Rich, and R. Taillet), report six
supernovae found with the CFHT in their high-redshift supernova
search:

SN       1999 UT     R.A. (2000.0) Decl.      Mag     z    Type
1999ez   Oct.  4   22 36 39.00  - 0 15 09.1   23.4   0.15   ?
1999fa   Oct.  4   22 37 29.64  - 0 11 36.1   23.8   0.82  Ia?
1999fb   Oct.  4   22 37 33.88  - 0 20 30.0   24.6   0.94   ?
1999fc   Oct.  4    3 02 30.41  + 0 10 14.0   24.8   0.65  Ia
1999fd   Oct.  4    3 03 17.49  + 0 03 06.6   25.3   0.88  Ia?
1999fe   Oct.  4    3 03 01.40  + 0 12 50.5   25.0    ?    II?

SNe 1999fb and 1999fd were reobserved 1-2 days after discovery on
the WIYN Telescope.  Confirmation spectroscopy was obtained on the
Keck II Telescope during the nights of Oct. 10, 12, and 13.  The
redshifts were determined from host-galaxy emission and absorption
lines, except for SN 1999fd, where no clear host was identified.

                      (C) Copyright 1999 CBAT
1999 November 18               (7311)            Daniel W. E. Green

Read IAUC 7310 SEARCH Read IAUC 7312

View IAUC 7311 in .dvi or .ps format.

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

Valid HTML 4.01!