Seminar Announcement - OATS-DAUT SEMINAR - Wednesday, Oct. 3rd, at 12:00 noon (Villa Bazzoni)

[Gabriella Schiulaz]

I announce you this week's OAT-DAUT seminar:

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                        OATS-DAUT SEMINAR 
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Speaker: Vincenzo Mainieri (ESO, Munich) 

Title: What can we learn on obscured AGN from the COSMOS Survey 

Date: Wednesday, October 3rd, 2007 
Time: 12:00 
Venue: Villa Bazzoni (Via Bazzoni, 2)

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Abstract: So far, a major challenge in tracking SBH growth at high redshift has been due to the fact that the growth phase of SBHs likely coincides with periods of high obscuration. It is extremely difficult to identify and follow up sufficiently large samples of such obscured AGN, since they are generally undetected at optical wavelengths. It is crucial to achieve a combination of wide area together with deep sensitivity in order to produce a complete sample of obscured AGN up to high redshift. The COSMOS survey is uniquely optimized to address this issue: it covers up to 2 squares degrees at X-ray, optical, IR and radio wavelengths. I will review the status of the different follow-up studies inside COSMOS relevant for this study, present the result of an X-ray spectral analysis on ~1000 X-ray selected AGN and discuss selection methods of obscured AGN using the Spitzer bands. 
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Next week's Seminar 


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OATS-DAUT SEMINAR 
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Speaker: François Leblanc (Service d'Aèronomie-CNRS-IPSL, Verrières-le-Buisson) 

Title: Mercury's atmosphere 

Date: Wednesday, October 10th, 2007 
Time: 12:00 
Venue: Villa Bazzoni 

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Abstract: MESSENGER is a US discovery mission that has been launched towards Mercury in August 2004 and will make its first flyby of Mercury in January 2008 for an orbit insertion in 2011. In the same time, the European SA is preparing Bepi Colombo a corner stone mission in collaboration with the Japan to be launched in August 2013 for an insertion around Mercury in 2019. Before these two missions, only one spacecraft, Mariner 10, made three flybys of Mercury 30 years ago. Mariner 10 has in particular revealed the unexpected presence of an intrinsic magnetic field and highlighted the presence of a thin atmosphere. Almost 10 years after Mariner 10 flybys, ground based observations have shown the possibility to probe Mercury's atmosphere from Earth. In 2001, the University of Padova has started a long term program of observations of this atmosphere using the Telescopio Nazionale Galileo and SARG an echelle spectrograph that we have later extended to the French-Italian solar telescope Themis as well as to international campaign. In this presentation, I will summarize the state of the art of our understanding of Mercury's atmosphere and the goals and achievements of my collaboration with the University of Padova. 
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For additional information on scheduled OAT seminars see:
http://adlibitum.oats.inaf.it/seminari/



Gabriella Schiulaz
segreteria OAT
Phone: 040-3199241
schiulaz at oats.inaf.itt
segreteria at oats.inaf.itt