Telecon Meetings
December 3rd, 2008 - 9 AM (Pacific Time)
- Welcome
- MW Data Update
- End of campaign? (discussion)
- Analysis tasks and signup
- Cross correlation
- SED (average SED, snapshots, etc.)
- Issues arising from microlensing by the intervening galaxy
- Timeline pdf
- Logistics
- Password protected webpage for reduced data and analysis
- Minutes pdf
October 23rd, 2008 - 9 AM (Pacific Time)
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- Meeting minutes pdf
Source Information
- Very interesting source, it is a BL Lac-type object, with weak emission lines at z=0.94, but also with strong absorption lines at z=0.524 (and a weak one at z=0.852), where the absorption at z-0.524 is also seen in H I in radio
- The last result indicates there is a galaxy in the line of sight, and it is seen as a "damped Ly alpha" absorption system of hydrogen (Hubble opt/UV spectroscopy); definitive info on absorption in paper by Junkkarinen (2004, ApJ, 614, 658)
- Presence of galaxy in the line of sight might be suggestive of explanation of variability as microlensing events
- Strong gamma-ray emitter reported by EGRET (Hunter et al. 1993), but variable - observations in 1994 (Madejski et al. 1996) showed much fainter gamma flux
- Rapidly variable X-ray emitter, studied by ROSAT and Asca (also Madejski et al. 1996)
- X-ray data clearly show excess absorption (due to intervening galaxy); in conjunction with H I and H Ly alpha data, yield metallicity of the intervening absorber
- For important and relevant papers - especially containing gamma-ray data - I'd add Hunter et al. 1993 (A&A 272, 59) and Madejski et al. 1996 (ApJ, 459, 156)
- This is the NED entry http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=0235%2B164&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
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