VERITAS: Very High Energy γ-ray Astronomy

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Presentation transcript:

VERITAS: Very High Energy γ-ray Astronomy Located at F.L. Whipple Observatory Stereoscopic array of 4 12-m Cherenkov tel. Prototype constructed in 2003 First stereoscopic events (2 tel.) in 2006 Full-scale operations in 2007 SAO is managing organization Operations funded by SAO, DOE & NSF World’s most-sensitive VHE observatory ~100 GeV to ~30 TeV; Sensitivity = ~10-12 erg cm-1 s-1 Energy resolution 20%, Angular resolution ~0.1º Upgrade complete in Summer 2012 ~2x increase in sensitivity; 40% lower energy threshold Plan to operate through at least 2017

VERITAS Science Overview ~100 scientists in VERITAS collaboration 22 institutions in 5 countries ~1/3 faculty, ~1/3 post-docs, ~1/3 students 42 refereed publications since 2007 ~35 articles in preparation 31 PhD theses since 2006 4 major themes of science program Particle Physics & Fundamental Laws Cosmology Black Holes Galactic Tevatrons / Pevatrons VERITAS Catalog: 40 sources, 6 classes Planned Observation Program

Recent Science Highlights Other highlights: Segue 1 data rule out a dark-matter interpretation of ATIC / PAMELA result: Phys Rev D, 852001, 2012 Key clues to mystery of cosmic-ray origin via VHE detection of M82: Nature, 462, 770, 2009 Numerous, rapid AGN flares: see, e.g., M87 event in Science, 325, 444, 2009 γ-ray Spectrum from the Crab Pulsar Surprising detection of pulsed >100 GeV γ-ray emission from the Crab Nebula Rules out exponential cutoff in γ-ray spectrum commonly assumed for pulsars; difficult to model Science, 334, 69, 2011 Another VHE 1st: 3 sources in 1 Extragal. FoV