#	Author Last Name	Author First Name	Email Address	Institution	Title	Abstract	Presentation	Discussion	Splinter Session
1	Beckmann	Volker	beckmann@milkyway.gsfc.nasa.gov	NASA / Goddard Space Flight Center	The INTEGRAL 20-40 keV AGN Survey and Luminosity Function	We have compiled a complete extragalactic sample based on $\sim25,000 \rm \, deg^2$ to a limiting flux of $3 \times 10^{-11} \rm \, ergs \, cm^{-2} \, s^{-1}$ ($\sim7,000 \rm \, deg^2$ to a flux limit of $10^{-11} \rm \, ergs \, cm^{-2} \, s^{-1}$) in the 20 -- 40 keV band with {\it INTEGRAL}. The flux-number relation is best described by a power-law with a slope of $\alpha = 1.66 \pm 0.11$. We present the first AGN luminosity function above 20 keV. The results are consistent with those derived in the $2 - 20 \rm \, keV$ energy band and do not show a significant contribution by Compton-thick objects.	oral	- does INTEGRAL miss the highly absorbed (Compton-thick) AGN so far? - does evolution of absorption with redshift solve the problem? - is dependency of absorption with redshift seen in the Chandra surveys? - deeper surveys using INTEGRAL/IBIS and Swift/BAT are needed and currently on-going, but those surveys will only shed light on the low redshift (z<0.1) universe	Monday: X-ray luminosity functions and evolution, Tuesday: AGN correlation functions, LSS, environments
3	Lehmer	Bret	blehmer@astro.psu.edu	Penn State University	The X-ray Properties of Early-Type Galaxies in the Extended Chandra Deep Field-South	We present X-ray stacking results from a large sample of $z < 0.7$ early-type galaxies within the Extended {\it Chandra} Deep Field-South region. We study separately optically luminous and faint galaxy samples, which have soft X-ray emission dominated by hot interstellar gas and low mass X-ray binaries (LMXBs), respectively. We observe no significant evolution in the X-ray emission from our optically luminous samples, which we attribute to intermittent heating of the hot interstellar gas (possibly from AGNs). For our optically faint samples we find suggestive evidence for evolution, possibly due to changes in LMXB populations.	oral		Monday: X-ray luminosity functions and evolution
4	Mateos	Silvia	sm279@star.le.ac.uk	University of Leicester	Statistical analysis of the X-ray emission properties of type-1 AGN in the XMM-2dF Wide Angle Survey	I will present the results of a statistical analysis of the X-ray emission properties of one of the largest samples of X-ray selected type-1 AGN assembled so far (>600 objects) from the XMM-2dF Wide Angle Survey. This study allows us to constrain the broad band continuum and intrinsic X-ray absorption properties of type-1 AGN and investigate their dependence with X-ray luminosity and redshift. I will also show how AGN population studies will benefit from the study of samples of objects selected from the 2XMM catalogue with both Sloan and UKIDSS data available	oral		Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments
6	Polletta	Mari	mcp@auriga.ucsd.edu	University of California, San Diego	X-ray surveys in the SWIRE fields	The combined capabilities of Spitzer, Chandra, and XMM-Newton provide a unique opportunity to investigate the properties of AGNs over large cosmic volumes. We present an overview of the X-ray surveys carried out in the SWIRE fields and report results from the Chandra/SWIRE survey in the Lockman Hole and the XMM-Newton Medium Deep Survey in the XMM-LSS field. The multi-wavelength SEDs of AGNs as a function of selection method, luminosity, and obscuration are characterized to asses AGN samples selection biases. The nature of obscured AGNs and their contribution to the cosmic X-ray background are discussed.	oral	- What are the properties (geometry, distribution, optical depth, etc..) of the matter responsible for X-ray absorption and optical obscuration ? - What triggers QSO activity ? - Is there a link between radio activity and accretion rate ? - We need surveys of well-defined samples that can answere specific questions.	Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments
7	Seymour	Nicholas	seymour@ipac.caltech.edu	Spitzer Science Center	Revealing the Nature of the Sub-mJy Radio Population with deep Multi-wavelength (X-ray/Optical/IR) Observations	Probing the exact nature of the faint (sub-mJy) radio population has been historically difficult due to the low luminosity of these sources. Using deep observations from {\it Chandra/XMM-Newton/Spitzer} and the GMRT we are able to disentangle the AGN and star-forming populations for the first time, using X-ray spectra/hardness ratios, IR colours and radio spectral indices. We are able to examine the star-formation history of the universe up to z~2 in a unique way based on an unbiased star-formation rate indicator, radio luminosity. This work provides an alternative perspective on the distribution of star-formation by mass, ``downsizing''.	oral	The use of multi-wavelength surveys to investigate the star-formation history and the link with the formation of super-massive black holes.	Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: Cluster Formation and Evolution
8	Steffen	Aaron	steffen@astro.psu.edu	Penn State	Extending $\alpha_{OX}$ studies to include the numerous low-to-moderate luminosity AGNs	We examine the luminosity dependence and evolution of the X-ray-to-UV flux ratio ($\alpha_{OX}$) for a sample of optically selected, radio-quiet, non-BAL AGNs. Combining luminous SDSS AGNs (including the 32 most luminous SDSS AGNs) having pointed and serendipitous Chandra, XMM-Newton, and ROSAT observations together with low-to-moderate luminosity AGNs in the Extended Chandra Deep Field - South maximizes coverage of the luminosity-redshift plane and includes the AGNs that dominate numerically in the Universe. Our large, homogeneous sample provides quantatively better constraints on the $\alpha_{OX}$, $L_UV$, and $z$ relation than earlier studies. Our data also suggest a non-linear relationship between $\alpha_{OX}$ and log$(L_{UV})$.	oral		Monday: X-ray luminosity functions and evolution, Tuesday: AGN correlation functions, LSS, environments
9	Tedds	Jonathan	jat@star.le.ac.uk	University of Leicester	X-ray Variability in the 2XMM Pre-release Serendipitous Catalogue	We present an X-ray variability study using the 2XMMp XMM-Newton Pre-release serendipitous source catalogue to provide constraints on short time-scale (mins-hours) variability for ~10% of the point source catalogue, i.e. ~10,000 extragalactic X-ray sources - a uniquely large sample for such studies. Furthermore since up to ~30% of catalogued sources have been observed more than once we can extract further information on long-term variability on scales of months-years for thousands of objects. Time series and spectral products were automatically generated for all sources having total EPIC > 500 counts in the energy range 0.2-12 keV. To test for variability we used a Chi-squared test (suitable for binned data) with the Pearson's approximation for Poissonian data and excluded high background flaring times. We determine the short-term variability properties for a large AGN sample, selected via Fx/Fopt following cross correlation with e.g. SDSS DR5. We also highlight extreme longer term variables that might be candidate Komossa-type objects in which an AGN is swallowing stars.	oral
10	Tueller	Jack	tueller@milkyway.gsfc.nasa.gov	NASA/GSFC	Swift/BAT Hard X-ray Survey of AGN	The BAT hard X-ray (14-100 keV) survey is the first complete and uniform survey of the whole sky not effected by absorption. The survey has detected >200 AGN with a low median z=0.03. Many of these are highly absorbed and have not been previously identified as AGN. The complete logN/LogS and luminosity function for local AGN will be presented. The survey also yields the spectral distributions and average spectrum for local AGN. Using Swift/XRT, we have 0.2-10 keV spectra for all the BAT AGN. The Swift spectral results are not consistent with the X-ray background without invoking strong evolution.	oral	Swift/BAT shows clearly that only very hard X-ray surveys (>20 keV) are complete due to the effects of absorption. Only a hard X-ray survey much deeper than BAT can accurately measure the evolution of AGN and yield a complete understanding of the history of giant black holes. This goal is within the reach of the EXIST/black hole finder mission.	Monday: X-ray luminosity functions and evolution, Tuesday: Groups and Interactions
11	Watson	Mike	mgw@star.le.ac.uk	Uiniversity of Leicester	The 2XMM Catalogue And Early Science	The XMM-Newton Survey Science Centre has recently released the second XMM-Newton serendipitous source catalogue, 2XMMp. This is the largest X-ray source catalogue ever made, including more than $\sim$ 150000 objects. The catalogue itself is also complemented by X-ray spectra and light curves for the brighter objects in each field (around 10\% of the total). 2XMM covers an area large enough ($\sim$ 300 sq.deg.) to provide large object samples and to reveal the rarest and most extreme objects in the X-ray sky. In this paper we will describe the 2XMM catalogue and highlight some early science results (and future potential) obtained by cross-matching with SDSS DR5 and the UKIDSS surveys.	oral		Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution
12	Winter	Lisa	lwinter@milkyway.gsfc.nasa.gov	University of Maryland	Early Results from SWIFT's BAT AGN Survey	The SWIFT gamma ray observatory's Burst Alert Telescope (BAT) has detected a sample of active galactic nuclei (AGN) based solely on their hard X-ray flux (15-150\,keV) (Markwardt et al. 2005). With approximately 200 BAT AGN sources, and an expected sample of 400 within the next two years, the potential scientific gain from a multi-wavelength study of the first such unbiased (unaffected by absorption or dilution from starlight), flux limited AGN sample is great. We present for the first time XMM follow-ups of 22 BAT AGN sources. We present X-ray spectra and light curves as well as UV data for these objects.	oral		Monday: Type I and II AGN, Absorption, XBONGs, Tuesday: AGN correlation functions, LSS, environments
13	Xu	Yueheng	yx12@star.le.ac.uk	XROA, University of Leicester	"Normal" galaxies sample from 2dF-XMM Wide Angle Survey	We present a sample of 72 "normal" galaxies selected from 2dF-XMM Wide Angle Survey and identify the origin of the X-ray emission from these galaxies. These "normal" galaxies are selected as having either absorption or narrow emission line spectra, X-ray-to-optical flux ratios $\log(f_X/f_R)\le -1$ and 0.2-12 keV luminosity $L_X\le 10^{43} \rm erg\ s^{-1}$. We discuss the relative fractions of this sample "normal" galaxies which are ellipticals/groups, low-luminosity AGNs and starbursts.	oral		Monday: 'Normal' Galaxies, Tuesday: Groups and Interactions