archive: SETI Fwd: NOVA VELORUM 1999

SETI Fwd: NOVA VELORUM 1999

Larry Klaes ( lklaes@bbn.com )
Tue, 25 May 1999 09:32:00 -0400

See also APOD for May 24, 1999:

http://antwrp.gsfc.nasa.gov/apod/ap990524.html

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>Date: Tue, 25 May 1999 00:21:27 EDT
>Reply-To: History of Astronomy Discussion Group <HASTRO-L@WVNVM.WVNET.EDU>
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>From: Marc DeFrancis <Marc2kids@AOL.COM>
>Subject: Fwd: NOVA VELORUM 1999
>To: HASTRO-L@WVNVM.WVNET.EDU
>
>A nova has just been discovered in the constellation Vela, which is centered
>roughly 45 degrees below the equatorial. The attached IAU circular reports
>below show that on May 22 it was clocked at mag 3.1 and on May 23 at 2.6. It
>seems to have been confirmed by spectral analyses as an exploding star. For
>those of you on this list who follow current astrophysics as well as the
>historical kind, this is exciting news.
>
>Enjoy
>--Marc DeFrancis
>
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>From: "Brent A. Archinal" <baa@casa.usno.navy.mil>
>Message-Id: <199905241737.NAA09898@casa.usno.navy.mil>
>Subject: NOVA VELORUM 1999
>To: novac@his.com
>Date: Mon, 24 May 1999 13:37:17 EDT
>Cc: baa@casa.usno.navy.mil (Brent A. Archinal)
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>
>A _very bright_ nova (now about second magnitude!) has been discovered
>in Velorum. The catch us that at it's highest in the sky it's about a
>degree below our horizon! Anybody for a road trip to the south?...
>
>Excepts from IAU Circulars follow...
>
>- Brent
>
> Circular No. 7176
>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)
>
>
>NOVA VELORUM 1999
> Independent visual discoveries of a bright nova have been made
>by Peter Williams, Heathcote, New South Wales (via S. Lee and A.
>Pearce), at m_v = 3.1 on May 22.396 UT and by Alan C. Gilmore,
>Mount John University Observatory, on May 22.451. Lee provides the
>following position from Anglo-Australian Telescope (AAT) encoders:
>R.A. = 10h44m49s.5, Decl. = -52o25'35" (equinox 2000.0). Lee
>reports that a low-dispersion spectrogram taken by Lewis, Colless,
>Cannon, Bridges, and himself with the AAT (+ fiber spectrograph on
>2dF; 1-s exposure, mirror stopped down to 2.5 m) shows H-alpha and
>H-beta in narrow emission with a strong P-Cyg profile. An echelle
>spectrogram (10-min exposure centered on May 22.500) of the
>apparent nova by K. R. Pollard and J. A. McSaveney with the Mt.
>John 1-m telescope shows H-alpha with blueshifted absorption and
>slightly redshifted emission. Gilmore provides the following
>photometry obtained with the Mount John 0.6-m reflector (comparison
>star HR 4167 = p Vel, with assumed V = 3.84, U-B = +0.07, B-V =
>+0.30, V-R = +0.20, V-I = +0.30): May 22.488, V = 2.88, U-B =
>-0.27, B-V = +0.24, V-R = +0.16, V-I = +0.28; 22.574, 2.85, -0.27,
>+0.28, +0.19, +0.27; 22.599, 2.84, -0.25, +0.29, +0.23, +0.33;
>22.635, 2.80, -0.26, +0.31, +0.23, +0.33. P. M. Kilmartin reports
>that a 1-s CCD (over)exposure on May 22.50 with the 0.6-m Boller &
>Chivens Cassegrain reflector at Mount John yields the following
>position end figures: 48s.1, 32" (four stars, mean residual 2".68
>in R.A., 0".43 in Decl.). Pearce provides the following visual
>magnitude estimates: May 22.42-22.52, 3.0; 22.54-22.58, 2.9.
>Pearce notes that there appears to be nothing obvious on the
>Digital Sky Survey image at the nova's position. P. Caldwell,
>Geelong, Victoria, reports m_v about 2.8 (close to or slightly
>fainter than the brightness of mu Vel) during May 22.50-22.53.
>...
>
>1999 May 22 (7176) Daniel W. E. Green
>
> Circular No. 7177
>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)
>
>
>NOVA VELORUM 1999
> G. J. Garradd, Loomberah, N.S.W., reports the following
>accurate CCD position obtained with a 0.45-m f/5.4 reflector on May
>23.358 UT: R.A. = 10h44m48s.39, Decl. = -52o25'30".7 (equinox
>2000.0; 6 ACT stars, rms residuals 0".29). He notes a distinct
>pale yellow color of the nova visually through the same telescope.
>P. Schmeer, Bischmisheim, Germany, notes that there is a blue star
>(mag 16.4) listed in the USNO-A2.0 catalogue at position end
>figures 48s.416, 31".23. Visual magnitude estimates: May 23.333,
>2.6 (D. A. J. Seargent, The Entrance, N.S.W.); 23.508, 2.6 (A.
>Pearce, Nedlands, W. Australia).
>...
>
>1999 May 23 (7177) Daniel W. E. Green
>