Looking for a thermal emission component in BL Lacertae

Details Looking for a thermal emission component in BL Lacertae Looking for a thermal emission component in BL Lacertae

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006xmm..prop...55r&link_type=abstract

XMM-Newton Proposal ID #05016601

Computer Science

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Bl Lacertae, Xmm-Newton Proposal 05016601

Scientific paper

We propose to observe BL Lacertae with XMM-Newton three times in AO6, to construct its SED in different brightness states. Our interest is focused on the UV and soft X-ray energy domains, and this makes XMM-Newton the ideal instrument to attain our goal, which is to investigate the existence of a UV to soft-X-ray bump, as we detected in AO 0235+16 with observations in AO3. This would mean that in BL Lac objects there may be an important emission component in addition to the synchrotron and inverse-Compton ones, which is likely the photoionizing source of the broad line region, similarly to the blue bump of FSRQs. Simultaneous observations at low frequencies by the WEBT will allow to to study the correlations among the emissions at different wavelengths.

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