2014ApJ...786..157A

Query : 2014ApJ...786..157A

2014ApJ...786..157A - Astrophys. J., 786, 157 (2014/May-2)

Multifrequency studies of the peculiar quasar 4C +21.35 during the 2010 flaring activity.

ACKERMANN M., AJELLO M., ALLAFORT A., ANTOLINI E., BARBIELLINI G., BASTIERI D., BELLAZZINI R., BISSALDI E., BONAMENTE E., BREGEON J., BRIGIDA M., BRUEL P., BUEHLER R., BUSON S., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CAVAZZUTI E., CECCHI C., CHAVES R.C.G., CHEKHTMAN A., CHIANG J., CHIARO G., CIPRINI S., CLAUS R., COHEN-TANUGI J., CONRAD J., CUTINI S., D'AMMANDO F., DE PALMA F., DERMER C.D., DO COUTO E SILVA E., DONATO D., DRELL P.S., FAVUZZI C., FINKE J., FOCKE W.B., FRANCKOWIAK A., FUKAZAWA Y., FUSCO P., GARGANO F., GASPARRINI D., GEHRELS N., GIGLIETTO N., GIORDANO F., GIROLETTI M., GODFREY G., GRENIER I.A., GUIRIEC S., HAYASHIDA M., HEWITT J.W., HORAN D., HUGHES R.E., IAFRATE G., JOHNSON A.S., KNODLSEDER J., KUSS M., LANDE J., LARSSON S., LATRONICO L., LONGO F., LOPARCO F., LOVELLETTE M.N., LUBRANO P., MAYER M., MAZZIOTTA M.N., McENERY J.E., MICHELSON P.F., MIZUNO T., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MURGIA S., NEMMEN R., NUSS E., OHSUGI T., ORIENTI M., ORLANDO E., PERKINS J.S., PESCE-ROLLINS M., PIRON F., PIVATO G., PORTER T.A., RAINO S., RAZZANO M., REIMER A., REIMER O., SANCHEZ D.A., SCHULZ A., SGRO C., SISKIND E.J., SPANDRE G., SPINELLI P., STAWARZ L., TAKAHASHI H., TAKAHASHI T., THAYER J.G., THAYER J.B., THOMPSON D.J., TINIVELLA M., TORRES D.F., TOSTI G., TROJA E., USHER T.L., VANDENBROUCKE J., VASILEIOU V., VIANELLO G., VITALE V., WERNER M., WINER B.L., WOOD D.L., WOOD K.S. (The Fermi Large Area Telescope Collaboration), ALEKSIC J., ANSOLDI S., ANTONELLI L.A., ANTORANZ P., BABIC A., BANGALE P., BARRES DE ALMEIDA U., BARRIO J.A., BECERRA GONZALEZ J., BEDNAREK W., BERGER K., BERNARDINI E., BILAND A., BLANCH O., BOCK R.K., BONNEFOY S., BONNOLI G., BORRACCI F., BRETZ T., CARMONA E., CAROSI A., CARRETO FIDALGO D., COLIN P., COLOMBO E., CONTRERAS J.L., CORTINA J., COVINO S., DA VELA P., DAZZI F., DE ANGELIS A., DE CANEVA G., DE LOTTO B., DELGADO MENDEZ C., DOERT M., DOMINGUEZ A., DOMINIS PRESTER D., DORNER D., DORO M., EINECKE S., EISENACHER D., ELSAESSER D., FARINA E., FERENC D., FONSECA M.V., FONT L., FRANTZEN K., FRUCK C., GARCIA LOPEZ R.J., GARCZARCZYK M., GARRIDO TERRATS D., GAUG M., GIAVITTO G., GODINOVIC N., GONZALEZ MUNOZ A., GOZZINI S.R., HADASCH D., HERRERO A., HILDEBRAND D., HOSE J., HRUPEC D., IDEC W., KADENIUS V., KELLERMANN H., KNOETIG M.L., KODANI K., KONNO Y., KRAUSE J., KUBO H., KUSHIDA J., LA BARBERA A., LELAS D., LEWANDOWSKA N., LINDFORS E., LOMBARDI S., LOPEZ M., LOPEZ-COTO R., LOPEZ-ORAMAS A., LORENZ E., LOZANO I., MAKARIEV M., MALLOT K., MANEVA G., MANKUZHIYIL N., MANNHEIM K., MARASCHI L., MARCOTE B., MARIOTTI M., MARTINEZ M., MAZIN D., MENZEL U., MEUCCI M., MIRANDA J.M., MIRZOYAN R., MORALEJO A., MUNAR-ADROVER P., NAKAJIMA D., NIEDZWIECKI A., NISHIJIMA K., NILSSON K., NOWAK N., ORITO R., OVERKEMPING A., PAIANO S., PALATIELLO M., PANEQUE D., PAOLETTI R., PAREDES J.M., PAREDES-FORTUNY X., PARTINI S., PERSIC M., PRADA F., PRADA MORONI P.G., PRANDINI E., PREZIUSO S., PULJAK I., REINTHAL R., RHODE W., RIBO M., RICO J., RODRIGUEZ GARCIA J., RUGAMER S., SAGGION A., SAITO T., SAITO K., SALVATI M., SATALECKA K., SCALZOTTO V., SCAPIN V., SCHULTZ C., SCHWEIZER T., SHORE S.N., SILLANPAA A., SITAREK J., SNIDARIC I., SOBCZYNSKA D., SPANIER F., STAMATESCU V., STAMERRA A., STEINBRING T., STORZ J., SUN S., SURIC T., TAKALO L., TAKAMI H., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESCARO D., TESHIMA M., THAELE J., TIBOLLA O., TOYAMA T., TREVES A., VOGLER P., WAGNER R.M., ZANDANEL F., ZANIN R. (The MAGIC Collaboration), ALLER M.F., ANGELAKIS E., BLINOV D.A., DJORGOVSKI S.G., DRAKE A.J., EFIMOVA N.V., GURWELL M.A., HOMAN D.C., JORDAN B., KOPATSKAYA E.N., KOVALEV Y.Y., KURTANIDZE O.M., LAHTEENMAKI A., LARIONOV V.M., LISTER M.L., NIEPPOLA E., NIKOLASHVILI M.G., ROS E., SAVOLAINEN T., SIGUA L.A. and TORNIKOSKI M.

Abstract (from CDS):

The discovery of rapidly variable Very High Energy (VHE; E > 100 GeV) γ-ray emission from 4C +21.35 (PKS 1222+216) by MAGIC on 2010 June 17, triggered by the high activity detected by the Fermi Large Area Telescope (LAT) in high energy (HE; E > 100 MeV) γ-rays, poses intriguing questions on the location of the γ-ray emitting region in this flat spectrum radio quasar. We present multifrequency data of 4C +21.35 collected from centimeter to VHE during 2010 to investigate the properties of this source and discuss a possible emission model. The first hint of detection at VHE was observed by MAGIC on 2010 May 3, soon after a γ-ray flare detected by Fermi-LAT that peaked on April 29. The same emission mechanism may therefore be responsible for both the HE and VHE emission during the 2010 flaring episodes. Two optical peaks were detected on 2010 April 20 and June 30, close in time but not simultaneous with the two γ-ray peaks, while no clear connection was observed between the X-ray and γ-ray emission. An increasing flux density was observed in radio and mm bands from the beginning of 2009, in accordance with the increasing γ-ray activity observed by Fermi-LAT, and peaking on 2011 January 27 in the mm regime (230 GHz). We model the spectral energy distributions (SEDs) of 4C +21.35 for the two periods of the VHE detection and a quiescent state, using a one-zone model with the emission coming from a very compact region outside the broad line region. The three SEDs can be fit with a combination of synchrotron self-Compton and external Compton emission of seed photons from a dust torus, changing only the electron distribution parameters between the epochs. The fit of the optical/UV part of the spectrum for 2010 April 29 seems to favor an inner disk radius of <six gravitational radii, as one would expect from a prograde-rotating Kerr black hole.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - gamma rays: general - quasars: general - quasars: individual: 4C +21.35 - radiation mechanisms: non-thermal

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 485 1
2 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
3 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
4 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
5 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
6 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
7 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
8 NGC 4631 GiC 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1154 3
9 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
10 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
11 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
12 DR 21 SFR 20 39 01.6 +42 19 38           O4.5 1121 0
13 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2541 1
14 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
15 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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