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# ICRC2015

July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

## 2FHL: The second Catalog of Hard Fermi-LAT Sources

Jul 31, 2015, 5:30 PM
30m
World Forum Theater (World Forum)

### World Forum Theater

#### World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Highlight talk GA-EX

### Speaker

Dr Marco Ajello (Clemson University)

### Description

The Fermi Large Area Telescope (LAT) has been routinely gathering science data since August 2008, surveying the full sky every three hours. The first Fermi-LAT catalog of sources detected above 10 GeV (1FHL) relied on three years of data to characterize the $>$10 GeV sky. The improved acceptance and point-spread function of the new Pass 8 event reconstruction and classification together with six years of observations now available allow the detection and characterization of sources directly above 50 GeV. This closes the gap between ground-based Cherenkov telescopes, which have excellent sensitivity but small fields of view and duty cycles, and all-sky observations at GeV energies from space. In this contribution we will present the second catalog of hard Fermi-LAT sources detected at $>$50 GeV. We will discuss the properties of the extragalactic and Galactic source populations with an emphasis on the detection of spatially extended sources in the plane of our Galaxy.
Collaboration FERMI 1158

### Primary author

Dr Marco Ajello (Clemson University)

### Co-authors

Dr Alberto Dominguez (Clemson University) Dr Cutini Sara (Agenzia Spaziale Italiana (ASI) Science Data Center) Dr Gasparrini Dario (Agenzia Spaziale Italiana (ASI) Science Data Center) Dr Jamie Cohen (University of Maryland)

### Presentation materials

There are no materials yet.