The FIRST Flat Spectrum Sample: Demographics and Blazar Sequence

Details The FIRST Flat Spectrum Sample: Demographics and Blazar Sequence The FIRST Flat Spectrum Sample: Demographics and Blazar Sequence

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.2004f&link_type=abstract

American Astronomical Society, HEAD meeting #10, #20.04

Statistics

Scientific paper

The FIRST Flat Spectrum Sample (FFSS) is a deep radio-selected "BLAZAR sample," unbiased with respect to x-ray emission. It is designed to enable us to determine the true census of the different types of blazars, by capturing -at once- a very wide range of phenomenology, resolving a long-standing uncertainty, and the first step towards understanding how Nature makes jets.
The FFSS is 95% identified. It comprises approx. 600 objects, selected from the FIRST radio survey, representing a very diverse mix of FSRQ (60%), BL Lacs (20%), and "galaxies" (15%). It spans the full range of SED colors, with relatively uniform statistics. The multiwavelength coverage is excellent (extensive and homogeneous), thanks also to SDSS and 2MASS. X-ray data are available for 2/3 of the sources, including archival and new Chandra/XMM observations for about 90 objects.
We have just completed the X-ray characterization of a complete 180-object subsample. We will report on our Chandra observations, on the progress towards addressing our first goal, testing the current luminosity/SED-color sequence paradigm, and on the relevance of/for GLAST for/of the FFSS. Preliminary (and model dependent) estimates suggest that all FFSS objects will be detected by GLAST over the survey period, hence providing a full energetics picture of a large set of blazars.
Support from Chandra (GO34147X, GO56115X) and XMM-Newton (NNG05GJ10G, NNG05GK68G) Guest Observer programs is gladly acknowledged.

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