2009/07/31 by Ana Pichel, Pichel, Ana
Computer Science · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Computational Physics and Python Applications #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Radio Astronomy Observations and Technology
paper · pdf · doi:10.48550/arxiv.0908.0010
openalex publication_date 2009/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Approximately 25 blazars are know to emit VHE (E>100 GeV) gamma rays. Understanding these powerful objects requires long-term, intense, monitoring observations since they exhibit strong, rapid and irregular variability across the entire electromagnetic spectrum. The Whipple 10-m Gamma-ray Telescope, the world's fourth most sensitive VHE telescope, is used primarily to perform such monitoring in the VHE band. The 10-m monitoring program focuses in particular on Mrk 421, Mrk 501, H 1426+428, 1ES 1959+650 and 1ES 2344+514, with observations performed every moonless night that each source is visible. Upon detection of a flare, alerts are sent to VERITAS and the astronomical community to trigger ToO observations, as was the case for one of the brightest-ever VHE flares of Mrk 421 in 2008. In addition to flaring alerts, the 10-m program is used to create long-term light curves, with unprecedented VHE sampling, that can be combined with other multi-frequency observations to better understand blazars. Highlights from the recent Whipple 10-m blazar program will be presented.