NOAO >   Observing Info >   Approved Programs >   2017B-0136

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Program Information for 2017B-0136


PI: David Williams, UC Santa Cruz, daw@ucsc.edu
Address: Santa Cruz Institute for Particle Physics, and Department of Physics, Santa Cruz CA, 95064 USA

CoI: Santiago Pita, APC/IN2P3 (Fr)
CoI: Paolo Goldoni, APC/CEA-Irfu (Fr)
CoI: Catherine Boisson, LERMA, Observatoire de Paris
CoI: Elina Lindfors, Tuorla Obs./University of Turku (Finland)
CoI: Kari Nilsson, FINCA (Finland)
CoI: Garret Cotter, University of Oxford (UK)
CoI: Jean-Philippe Lenain, LPNHE/CNRS
CoI: Julien Lefaucheur, LUTH/OBSPM
CoI: Ricardo Salinas, Gemini Observatory
CoI: Josefa Becerra, IAC

Title: Deep imaging of host galaxies of extreme AGNs

Abstract: Blazars are the brightest extragalactic sources in the VHE (E>100 GeV) gamma-ray sky. New advances in key topics of high-energy astrophysics, such as the understanding of blazars' population and evolution and also the determination of the extragalactic background light (EBL), require the detection of new sources and precise knowledge of their redshifts. However, determining the redshift is very challenging, as the optical emission in blazars is strongly dominated by the non-thermal emission from the nucleus. Therefore, instead of spectroscopy, we ask for near-IR imaging to detect the host galaxies and get an estimate on the redshift. We have selected a set of blazars detected beyond 10 GeV by the Fermi-LAT and subsequently identified as excellent targets for the future Cherenkov Telescope Array (CTA). These sources have unknown redshifts. This proposal is part of a large effort to organize the outcome of CTA whose construction will start in 2017 with first telescopes on site in 2018.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017B):  GEM-SQ/GMOSS -- 14hrs band 3 (GS-2017B-Q-81)


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017B-0136

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