Monitoring of multi-frequency polarization of gamma-ray bright AGNs

We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz. One is a single-dish weekly-observing program in dual polarization with KVN 21-m diameter radio telescopes beginning in 2011 May. The other is a VLBI monthly-observing program with the three-element VLBI network at an angular resolution range of 1.0-9.2 mas beginning in 2012 December. The monitoring observations aim to study correlation of variability in gamma-ray with that in radio flux density and polarization of relativistic jets when they flare up. These observations enable us to study the origin of the gamma-ray flares of AGNs.

[1]  Paul S. Smith,et al.  A TIGHT CONNECTION BETWEEN GAMMA-RAY OUTBURSTS AND PARSEC-SCALE JET ACTIVITY IN THE QUASAR 3C 454.3 , 2013, 1307.2522.

[2]  Do-Young Byun,et al.  Korean VLBI Network Receiver Optics for Simultaneous Multifrequency Observation: Evaluation , 2013 .

[3]  Paul S. Smith,et al.  RAPID TeV GAMMA-RAY FLARING OF BL LACERTAE , 2012, 1211.3073.

[4]  Dirk Grupe,et al.  MULTIWAVELENGTH VARIATIONS OF 3C 454.3 DURING THE 2010 NOVEMBER TO 2011 JANUARY OUTBURST , 2012, 1208.4564.

[5]  W. P. Chen,et al.  THE STRUCTURE AND EMISSION MODEL OF THE RELATIVISTIC JET IN THE QUASAR 3C 279 INFERRED FROM RADIO TO HIGH-ENERGY γ-RAY OBSERVATIONS IN 2008–2010 , 2012, 1206.0745.

[6]  Sang-Sung Lee,et al.  Single-Dish Performance of KVN 21 m Radio Telescopes: Simultaneous Observations at 22 and 43 GHz , 2011, 1110.3881.

[7]  M. Trifoglio,et al.  THE BRIGHTEST GAMMA-RAY FLARING BLAZAR IN THE SKY: AGILE AND MULTI-WAVELENGTH OBSERVATIONS OF 3C 454.3 DURING 2010 NOVEMBER , 2011, 1106.5162.

[8]  A. Connolly,et al.  THREE-POINT CORRELATION FUNCTIONS OF SDSS GALAXIES: LUMINOSITY AND COLOR DEPENDENCE IN REDSHIFT AND PROJECTED SPACE , 2010, 1007.2414.

[9]  Paul S. Smith,et al.  LOCATION OF γ-RAY FLARE EMISSION IN THE JET OF THE BL LACERTAE OBJECT OJ287 MORE THAN 14 pc FROM THE CENTRAL ENGINE , 2010, 1011.6454.

[10]  C. Fassnacht,et al.  OBSCURED STARBURST ACTIVITY IN HIGH-REDSHIFT CLUSTERS AND GROUPS , 2010, 1009.2750.

[11]  M. Gurwell,et al.  The Multifrequency Campaign on 3C 279 in January 2006 , 2010, 1008.1010.

[12]  P. Giommi,et al.  A change in the optical polarization associated with a γ-ray flare in the blazar 3C 279 , 2010 .

[13]  P. Giommi,et al.  Results of WEBT, VLBA and RXTE monitoring of 3C 279 during 2006-2007 ⋆ , 2008, 0810.4261.

[14]  Paul S. Smith,et al.  The inner jet of an active galactic nucleus as revealed by a radio-to-γ-ray outburst , 2008, Nature.

[15]  M. Kidger,et al.  A massive binary black-hole system in OJ 287 and a test of general relativity , 2008, Nature.

[16]  Jungwon Lee,et al.  Millimeter-wave Receiver Optics for Korean VLBI Network , 2008 .

[17]  R. Hudec,et al.  Predicting the Next Outbursts of OJ 287 in 2006-2010 , 2006 .

[18]  D. Meier,et al.  Magnetohydrodynamic production of relativistic jets. , 2001, Science.

[19]  C. Megan Urry,et al.  VARIABILITY OF ACTIVE GALACTIC NUCLEI , 1997 .

[20]  H. Lehto,et al.  OJ 287 Outburst Structure and a Binary Black Hole Model , 1996 .

[21]  A. Sillanpää,et al.  OJ 287 - Binary pair of supermassive black holes , 1988 .

[22]  R. Blandford,et al.  Hydromagnetic flows from accretion discs and the production of radio jets , 1982 .

[23]  R. Blandford,et al.  Electromagnetic extraction of energy from Kerr black holes , 1977 .

[24]  S. Hawley,et al.  The Spectrum and Redshift of BL Lacertae , 1977 .