2025MNRAS.540..364A

Query : 2025MNRAS.540..364A

2025MNRAS.540..364A - Mon. Not. R. Astron. Soc., 540, 364-384 (2025/June-2)

Multiwavelength study of OT 081: broadband modelling of a transitional blazar.

ABE H., ABE S., ACCIARI V.A., AGUDO I., ANIELLO T., ANSOLDI S., ANTONELLI L.A., ARBET ENGELS A., ARCARO C., ARTERO M., ASANO K., BAACK D., BABIC A., BAQUERO A., BARRES DE ALMEIDA U., BATKOVIC I., BAXTER J., BERNARDINI E., BERNARDOS M., BERNETE J., BERTI A., BIGONGIARI C., BILAND A., BLANCH O., BONNOLI G., BOSNJAK Z., BURELLI I., BUSETTO G., CAMPOY-ORDAZ A., CAROSI A., CAROSI R., CARRETERO-CASTRILLO M., CASTRO-TIRADO A.J., CHAI Y., CIFUENTES A., CIKOTA S., COLOMBO E., CONTRERAS J.L., CORTINA J., COVINO S., D'AMICO G., D'ELIA V., DA VELA P., DAZZI F., DE ANGELIS A., DE LOTTO B., DEL POPOLO A., DELFINO M., DELGADO J., DELGADO MENDEZ C., DEPAOLI D., DI PIERRO F., DI VENERE L., DOMINIS PRESTER D., DONINI A., DORNER D., DORO M., ELSAESSER D., EMERY G., ESCUDERO J., FARINA L., FATTORINI A., FOFFANO L., FONT L., FUKAMI S., FUKAZAWA Y., GARCIA LOPEZ R.J., GASPARYAN S., GAUG M., GIESBRECHT PAIVA J.G., GIGLIETTO N., GIORDANO F., GLIWNY P., GRAU R., GREEN J.G., HADASCH D., HAHN A., HECKMANN L., HERRERA J., HRUPEC D., HUTTEN M., IMAZAWA R., INADA T., IOTOV R., ISHIO K., JIMENEZ MARTINEZ I., JORMANAINEN J., KERSZBERG D., KLUGE G.W., KOBAYASHI Y., KUBO H., KUSHIDA J., LAINEZ LEZAUN M., LAMASTRA A., LEONE F., LINDFORS E., LINHOFF L., LOMBARDI S., LONGO F., LOPEZ-MOYA M., LOPEZ-ORAMAS A., LOPORCHIO S., LORINI A., MACHADO DE OLIVEIRA FRAGA B., MAJUMDAR P., MAKARIEV M., MANEVA G., MANG N., MANGANARO M., MANGANO S., MANNHEIM K., MARIOTTI M., MARTINEZ M., MAS-AGUILAR A., MAZIN D., MENCHIARI S., MENDER S., MICANOVIC S., MICELI D., MIRANDA J.M., MIRZOYAN R., MOLINA E., MONDAL H.A., MORCUENDE D., NANCI C., NEUSTROEV V., NIGRO C., NISHIJIMA K., NJOH EKOUME T., NODA K., NOZAKI S., OHTANI Y., OTERO-SANTOS J., PAIANO S., PALATIELLO M., PANEQUE D., PAOLETTI R., PAREDES J.M., PAVLETIC L., PERSIC M., PIHET M., PIROLA G., PODOBNIK F., PRADA MORONI P.G., PRANDINI E., PRINCIPE G., PRIYADARSHI C., RHODE W., RIBO M., RICO J., RIGHI C., SAHAKYAN N., SAITO T., SATALECKA K., SATURNI F.G., SCHLEICHER B., SCHMIDT K., SCHMUCKERMAIER F., SCHUBERT J.L., SCHWEIZER T., SITAREK J., SPOLON A., STAMERRA A., STRISKOVIC J., STROM D., SUDA Y., SURIC T., SUUTARINEN S., TAJIMA H., TAKAHASHI M., TAKEISHI R., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESHIMA M., TOSTI L., TRUZZI S., UBACH S., VAN SCHERPENBERG J., VENTURA S., VERGUILOV V., VIALE I., VIGORITO C.F., VITALE V., WALTER R., YAMAMOTO T., AIT BENKHALI F., BECHERINI Y., BI B., BOTTCHER M., BOLMONT J., BROWN A., BULIK T., CASANOVA S., CHAND T., CHANDRA S., CHIBUEZE J., CHIBUEZE O., EGBERTS K., EINECKE S., ERNENWEIN J.-P., FONTAINE G., GABICI S., GOSWAMI P., HOLLER M., JAMROZY M., JOSHI V., KASAI E., KATARZYNSKI K., KHATOON R., KHELIFI B., KLUZNIAK W., KOSACK K., LANG R.G., LE STUM S., LEMIERE A., MARX R., MODERSKI R., MOGHADAM M.O., DE NAUROIS M., NIEMIEC J., O'BRIEN P., OSTROWSKI M., PERON G., PITA S., PUHLHOFER G., QUIRRENBACH A., RUDAK B., SAHAKIAN V., SANCHEZ D.A., SANTANGELO A., SASAKI M., SCHUTTE H.M., SEGLAR-ARROYO M., SHAPOPI J.N.S., STEENKAMP R., STEPPA C., SUZUKI H., TANAKA T., TLUCZYKONT M., VENTER C., WAGNER S.J., WIERZCHOLSKA A., ZDZIARSKI A.A., ZYWUCKA N., BECERRA GONZALEZ J., CIPRINI S., VENTERS T.M., D'AMMANDO F., ESTEBAN-GUTIERREZ A., FALLAH RAMAZANI V., FILIPPENKO A.V., HOVATTA T., JERMAK H., JORSTAD S., KIEHLMANN S., LAHTEENMAKI A., LARIONOV V.M., LARIONOVA E., MARSCHER A.P., MOROZOVA D., MAX-MOERBECK W., READHEAD A.C.S., REEVES R., STEELE I.A., TORNIKOSKI M., VERRECCHIA F., XIAO H.B. and ZHENG W.

Abstract (from CDS):

OT 081 is a well-known, luminous blazar that is remarkably variable in many energy bands. We present the first broadband study of the source, which includes very high energy (VHE, $E\gt $ 100 GeV) $\gamma$-ray data taken by the MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov telescopes) and H.E.S.S. (High Energy Stereoscopic System) imaging Cherenkov telescopes. The discovery of VHE $\gamma$-ray emission happened during a high state of $\gamma$-ray activity in July 2016, observed by many instruments from radio to VHE $\gamma$-rays. We identify four states of activity of the source, one of which includes VHE $\gamma$-ray emission. Variability in the VHE domain is found on daily time-scales. The intrinsic VHE spectrum can be described by a power law with index $3.27\pm 0.44_{\rm stat}\pm 0.15_{\rm sys}$ (MAGIC) and $3.39\pm 0.58_{\rm stat}\pm 0.64_{\rm sys}$ (H.E.S.S.) in the energy range of 55-300 and 120-500 GeV, respectively. The broadband emission cannot be successfully reproduced by a simple one-zone synchrotron self-Compton model. Instead, an additional external Compton component is required. We test a lepto-hadronic model that reproduces the data set well and a proton-synchrotron-dominated model that requires an extreme proton luminosity. Emission models that are able to successfully represent the data place the emitting region well outside of the broad-line region to a location at which the radiative environment is dominated by the infrared thermal radiation field of the dusty torus. In the scenario described by this flaring activity, the source appears to be a flat spectrum radio quasar (FSRQ), in contrast with past categorizations. This suggests that the source can be considered to be a transitional blazar, intermediate between BL Lac and FSRQ objects.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: active - galaxies: individual: OT 081 - galaxies: jets - quasars: general - gamma-rays: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/540/364): table1.dat fig2a.dat fig2b.dat fig2c.dat fig4a.dat fig4b.dat fig4c.dat>

Simbad objects: 17

goto Full paper

goto View the references in ADS

Number of rows : 17
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 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 603 3
2 PMN J0509+0541 BLL 05 09 25.9644373872 +05 41 35.333820420 15.32 14.95 14.78 15.12   ~ 589 2
3 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
4 QSO B0736+01 Bla 07 39 18.03389906 +01 37 04.6177501   16.90 16.47 16.19   ~ 738 1
5 6C 095456+654857 BLL 09 58 47.2451872176 +65 33 54.819354600     17.0 15.75   ~ 771 1
6 Ton 599 Bla 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 989 1
7 7C 122223.5+213929 Bla 12 24 54.4583146056 +21 22 46.385507388   17.56 17.50 18.2   ~ 770 2
8 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
9 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
10 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 476 1
11 6C 142016+323628 Bla 14 22 30.3788624376 +32 23 10.440862980   19.33 19.16 19.11   ~ 196 1
12 7C 1441+2514 Bla 14 43 56.89220390 +25 01 44.4907165   19.5   19.7   ~ 179 1
13 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
14 ESO 514-1 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 815 3
15 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 1007 1
16 BWE 1816+0902 Bla 18 18 40.0616593848 +09 03 46.230992640   19.0 19.5 18.5   ~ 57 1
17 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1

To bookmark this query, right click on this link: simbad:objects in 2025MNRAS.540..364A and select 'bookmark this link' or equivalent in the popup menu