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X-WR-CALNAME:Erlangen Centre for Astroparticle Physics
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X-WR-CALDESC:Events for Erlangen Centre for Astroparticle Physics
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DTSTART;TZID=Europe/Berlin:20211202T130000
DTEND;TZID=Europe/Berlin:20211202T140000
DTSTAMP:20260418T131806
CREATED:20211123T111230Z
LAST-MODIFIED:20211123T111230Z
UID:3802-1638450000-1638453600@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Georg Lamer
DESCRIPTION:Two years of eROSITA all-sky surveys: The variable X-ray sky\nThe eROSITA telescope onboard the SRG satellite was launched on 13 July 2019. After an initial phase of calibration and performance verification observations eROSITA started its all-sky survey operation in December 2019. Covering the entire sky within 6 months\, eROSITA is now close to completing its 4th all-sky survey in the 0.2-10 keV band. With the repeated detection of about 1 Million sources in each of the surveys\, the eROSITA surveys are a particularly rich resource for the study of variable X-ray sources.\nI will report on selected highlights of the mission such as an accurate distance measurement towards a Black Hole candidate using dust scattering\, the observation of isolated neutron stars\, or of galaxies caught in the moment of ignition or shut-down of their active nuclei.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-12-02-georg-lamer/
LOCATION:Zoom
CATEGORIES:Seminar
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DTSTART;TZID=Europe/Berlin:20211217T110000
DTEND;TZID=Europe/Berlin:20211217T120000
DTSTAMP:20260418T131806
CREATED:20211109T204402Z
LAST-MODIFIED:20211109T204402Z
UID:3796-1639738800-1639742400@ecap.nat.fau.de
SUMMARY:ECAP Seminar: Alberto Dominguez
DESCRIPTION:Galaxy evolution and cosmology using gamma rays observed with Fermi-LAT\nThe light emitted by all galaxies across the history of the Universe is encoded in the intensity of the extragalactic background light (EBL)\, the diffuse cosmic radiation field at ultraviolet\, optical\, and infrared wavelengths. The EBL is a source of opacity for very high energy gamma rays via pair production\, leaving a characteristic attenuation imprint in the spectra of distant gamma-ray sources. In this seminar\, I will report on new measurements of the EBL using gamma-ray data from both the Large Area Telescope on board the Fermi Gamma-ray Space Telescope and ground-based Imaging Atmospheric Cherenkov Telescopes. These unprecedented measurements have allowed us to derive the cosmic star-formation history\, the number density of faint galaxies during the re-ionization epoch\, and also the expansion rate of the Universe and its matter content. These results demonstrate that gamma-ray astrophysics has matured to the point of providing competitive measurements of cosmic properties previously restricted to techniques used by more traditional astronomy.
URL:https://ecap.nat.fau.de/index.php/event/ecap-seminar-2021-12-17-alberto-dominguez/
LOCATION:ECAP\, room 307\, Erwin-Rommel-Str 1\, Erlangen\, 91058\, Germany
CATEGORIES:Seminar
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