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)
- Welcome
- Available MW data:
- OVRO summary - Joey Richards
- GASP summary - Gino Tosti (on behalf of Massimo Villata)
- XTE - Gianpiero
- Fermi summary - Luis Reyes
- VERITAS summary - David Steele
- F-GAMMA radio cm/mm/sub-mm - Lars Fuhrmann
- Other MW data
- Discussion about Future plans
- 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
Name |
RA |
DEC |
Redshift |
L |
B |
|---|---|---|---|---|---|
0235+164 |
39.66 |
16.62 |
0.940 |
156.77 |
-39.11 |
Important Papers
Paper |
Authors |
Title |
|---|---|---|
2008A&A...480..339R |
Raiteri, C. M. et al. |
Radio-to-UV monitoring of AO 0235+164 by the WEBT and Swift during the 2006-2007 outburst |
2007A&A...464..871R |
Raiteri, C. M. et al. |
Spectroscopic monitoring of the BL Lac object AO 0235+164 |
2006ApJ...650..749L |
LIU, F. K.; ZHA |
HARMONIC QPOS AND THICK ACCRETION DISK OSCILLATIONS IN THE BL LACERTAE OBJECT AO 0235+164 |
2006A&A...459..731R |
Raiteri, C. M. et al. |
Multifrequency variability of the blazar AO 0235+164. The WEBT campaign in 2004-2005 and long-term SED analysis |
2006A&A...452..845R |
Raiteri, C. M. et al. |
X-ray emission from the blazar AO 0235+16: the XMM-Newton and Chandra point of view |
2005A&A...438...39R |
Raiteri, C. M. et al. |
The WEBT campaign to observe AO 0235+16 in the 2003-2004 observing season. Results from radio-to-optical monitoring and XMM-Newton observations |
2001A&A...377..396R |
Raiteri, C. M. et al. |
Optical and radio variability of the BL Lacertae object AO 0235+16: A possible 5-6 year periodicity |
2001A&A...376...69C |
CHEN, Y., JIANG |
THE SPECTRAL ENERGY DISTRIBUTION OF AO 0235+164 DURING TWO ACTIVE OPTICAL PHASES |
2000AJ....120...41W |
WEBB, J., HOWARD |
THE 1997 OUTBURST OF AO 0235+164: EVIDENCE FOR A MICROLENSING EVENT? |
1996AJ....112.2533B |
BURBIDGE, E. M |
AO 0235+164 AND SURROUNDING FIELD: SURPRISING HST RESULTS |