Subject: [Fwd: INTEGRAL User Group]

Folks,

Her er en mail til IUG fra Wim om definition of "nearby" supernova.

Se også link til IUG home page.

Når I kigger på den, så kan I også kaste et blik på det nye key program 
for AO6
http://www.sciops.esa.int/index.php?project=INTEGRAL&page=index

Søren

-------- Original Message --------
Subject: 	INTEGRAL User Group


Dear Colleagues,

I would like to draw your attention to the INTEGRAL WWW site
http://www.sciops.esa.int/index.php?project=INTEGRAL&page=IUG 
where the IUG ToR, membership etc have been posted, as well as the minutes
of our November meeting.

In our meeting we gave an action (05-8) to Eugene Churazov :" Define a reasonable definition of a nearby SN". This definition should be introduced in the documentation for AO-6 in addition to what was agreed on the Galactic SN. We have received the input, and have to agree on it a.s.a.p. in order that Chris Winkler can still  insert this in the documentation.

The proposal is the following:

 Extragalactic, but nearby, supernova.
 ====================================

The modelling of typical supernova explosions suggests that fluxes of
 brightest lines (e.g. 847 keV and 1238 keV lines of $^{26}Co$ decay)
 are of order $10^{-3}~{\rm phot/s/cm2}}$ at the distances of 60 kpc and
1 Mpc for SNII and SNIa respectively. At such high fluxes INTEGRAL is
expected to deliver extremely valuable science. For SNII this means
that a supernova in LMC and SMC is an excellent target for
INTEGRAL. For SNIa the explosion is Andromeda is expected to be
equally bright event for INTEGRAL.  Following IUG recommendation the
same approach (as for Galactic Supernova) will be used in the
case of an extragalactic but nearby supernova.

One however has to bear in mind substantial diversity of supernovae
properties. It is expected therefore that changes will be made to the
observing strategy of a particular supernova to maximize the science 
return from INTEGRAL.

========================================================

In short, the galactic case is extended with the same strategy. 
The criteria should be:
for SN II: Galaxy and up to 60 kpc (LMC/SMC)
for SNIa: Galaxy and up to 1 Mpc (M31)

Please, send any comments by return mail!

Furthermore, we tentatively selected June 12 and 13 as the dates for our next meeting, preferably in ESAC.
I was advised not to select a Friday as our last meeting day. The proposal now is to have our next meeting 
on Wednesday and Thursday 4 and 5 June.

Please, let me know whether you have problems with these dates o that we can fix this a.s.a.p.

My best regards,

Wim Hermsen


Prof. dr. W. Hermsen
Head High Energy Astrophysics Division
SRON Netherlands Institute for Space Research
Sorbonnelaan 2,  3584 CA  Utrecht
The Netherlands
tel.: +31 30 2538571,  fax: +31 30 2540860
email: w.hermsen@sron.nl






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