Blazar Archetypes as Probes of Jet Physics

Details Blazar Archetypes as Probes of Jet Physics Blazar Archetypes as Probes of Jet Physics

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50231w&link_type=abstract

Spitzer Proposal ID #50231

Computer Science

Scientific paper

We propose to observe three archetypal blazars daily during intense 21-day global multiwavelength campaigns. The blazars 3C279, 3C454.3, and PKS 0528+134 are the brightest and most active observed with the EGRET instrument on the gamma ray telescope CGRO; we expect them to be detected at high SNR with GLAST. The Spitzer observations will be coordinated with daily Swift x-ray, ultraviolet and optical observations, with continuous GLAST sky-scanning observations., and with extensive groundbased observations. The resulting time-resolved spectral energy distributions, light curves and time lags between wavebands provide information on important aspects of the jet and its environment. These include breaking the degeneracy between the Doppler factor, the magnetic field, and the Lorentz factor at the break in the electron distribution. We will also model the composition of the jet (leptons or leptons and hadrons). Ultimately, the composition of the jets affects how much power is transmitted to the radio lobes, and thus how much power is dumped into the galaxy and environment. All three instruments will be used in standard instrument campaigns. The observations can be spaced flexibly every 24-48 hours depending on the length of the actual instrument cycles. GLAST will be launched in mid-2008 and will scan the full sky every three hours. We have identified optimal and backup windows which depend on the actual launch date. The coordinated observations are loosely constrained because Swift scheduling is very flexible: Swift can follow the Spitzer schedule. This is the second highest priority proposal of the GLAST LAT AGN Collaboration and is submitted on the Collaboration's behalf.

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