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[vsnet-campaign-v838mon 364] Re: The reflection nebula around V838 Mon
Hallo, attached you find the circular we submitted
to IAU on May 1st - I do not know why it has not appeared
yet.
Marina Orio
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Marina Orio:
In Wisconsin:
Astronomy Dept., 475 N. Charter Str., 53706 Madison WI
Phone +1-608-262-9387 Fax +1-608-263-0800 orio@cow.physics.wisc.edu
In Italy: National Institute for Astrophysics (INAF)
Osservatorio Astronomico di Torino, Strada Osservatorio 20,
Pino Torinese (TO), I-10025 Italy
Tel +39-011-8101910 Fax +39-011-8101930 orio@to.astro.it
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From orio@cow.physics.wisc.edu Wed May 1 15:14:52 2002 -0500
Status: R
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Date: Wed, 1 May 2002 15:14:51 -0500 (CDT)
From: Marina Orio <orio@cow.physics.wisc.edu>
To: cbat@cfa.harvard.edu
Subject: Re: Discovery to submit
Message-ID: <Pine.OSF.4.03.10205011436170.30713-100000@cow.physics.wisc.edu>
MIME-Version: 1.0
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Hallo,
We would like to report the following discovery on
a IAU Circular:
"Images of the "light echo" around V838 Mon (IAUC
7859) taken with the WIYN 3.5m telescope (0".141/pixel) in the R
band and with an H(alpha) narrow filter on April 19 2002,
in V band and with an [OIII] narrow filter on April 21 2002.
show a filled shell, approximately circular, and not
limb brightened, with a 35 arcsec diameter on both nights.
(See http://cow.physics.wisc.edu/~orio/v838monb.html).
The contour of the shell is irregular, with
a broad structure in the shape of an arc and clumps, but no small
scale structure. There is more structure in V than in R.
Lack of conspicuous H(alpha) and [OIII] line emission
confirms that it is a reflection rather than a ionization
nebula. An image obtained on April 30 at the WIYN 90cm
telescope (scale 0".60 arcsec/pixel) in R band still shows a 35 arcsec
diameter, so the outer edge of the reflecting material
was reached before April 22."
M. Orio (INAF-Torino and Univ. Wisconsin), D. Harbeck
(Max Planck Inst. Astron., Heidelberg) and J. Gallagher and
C. Woodward (Univ. Wisconsin).
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Marina Orio:
In Wisconsin:
Astronomy Dept., 475 N. Charter Str., 53706 Madison WI
Phone +1-608-262-9387 Fax +1-608-263-0800 orio@cow.physics.wisc.edu
In Italy: National Institute for Astrophysics (INAF)
Osservatorio Astronomico di Torino, Strada Osservatorio 20,
Pino Torinese (TO), I-10025 Italy
Tel +39-011-8101910 Fax +39-011-8101930 orio@to.astro.it
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