Bulletin of the AAS (BAAS), volume 40, number 1, 2008 (38.02)

VERITAS results of observations of galactic objects carried out during first two years of operation will be presented. Among them are observations of a number of PWNe and SNR, as well as a few other galactic objects of the different source types. Two objects, PWN IC443 and SNR Cas A, have been recently detected with VERITAS at TeV energies. I will summarize the VERITAS data and briefly discuss the physics implications of the latest results.

Bulletin of the AAS (BAAS), volume 40, number 1, 2008 (26.24)

The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is an array of four 12m diameter imaging Cherenkov telescopes located at the Fred Lawrence Whipple Observatory in southern Arizona. Gamma-ray observations of blazars in the GeV-TeV energy range can be used to probe the structure and composition of their jets, constrain the intensity and spectrum of the extragalactic background light (EBL), and contribute to our understanding of how supermassive black holes accrete matter. Here we report on recent gamma-ray observations of several blazars with VERITAS.

Bulletin of the AAS (BAAS), volume 40, number 1, 2008 (31.08)

In 1999 HEGRA detected TeV gamma-ray emission from Cas A, the youngest supernova remnant in our galaxy. This detection showed Cas A to be a site of acceleration for cosmic-rays, leptons or hadrons. Cas A has been observed during Fall 2007 for about 20 hours with VERITAS, an array of four imaging atmospheric Cherenkov telescopes located at the Whipple Observatory at Mt. Hopkins in southern Arizona. VERITAS observes a point-like gamma-ray excess at the location of Cas A with a statistical significance of about 8 sigma. Cas A is found to have a Crab-like gamma-ray spectrum with an integrated flux above 1 TeV of 3% of the Crab Nebula's flux.

Bulletin of the AAS (BAAS), volume 40, number 1, 2008 (26.25)

The VERITAS atmospheric Cherenkov telescope array detected gamma-ray emission above 250GeV from M87 in Spring 2007 and reported a clear year-scale correlation between gamma-ray and X-ray emissions measured by TeV experiments and the ASM/RXTE observatory. For Spring 2008, a long-term monitoring study of M87 is coordinated between H.E.S.S., MAGIC, and VERITAS, with X-ray observations by Chandra. The proximity of M87 provides a unique opportunity to carry out multiwavelength observations to study in detail the source and the mechanisms of high-energy emission from Active Galactic Nuclei. We will present preliminary results obtained with VERITAS from this ongoing campaign.