SIMBAD references

2021A&A...655A..89M - Astronomy and Astrophysics, volume 655A89-89 (2021/11-1)

Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017.

MAGIC COLLABORATION, ACCIARI V.A., ANSOLDI S., ANTONELLI L.A., ARBET ENGELS A., ARTERO M., ASANO K., BABIC A., BAQUERO A., BARRES DE ALMEIDA U., BARRIO J.A., BATKOVIC I., BECERRA GONZALEZ J., BEDNAREK W., BELLIZZI L., BERNARDINI E., BERNARDOS M., BERTI A., BESENRIEDER J., BHATTACHARYYA W., BIGONGIARI C., BLANCH O., BOSNJAK Z., BUSETTO G., CAROSI R., CERIBELLA G., CERRUTI M., CHAI Y., CHILINGARIAN A., CIKOTA S., COLAK S.M., 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., DELFINO M., DELGADO J., DELGADO MENDEZ C., DEPAOLI D., DI PIERRO F., DI VENERE L., DO SOUTO ESPINEIRA E., DOMINIS PRESTER D., DONINI A., DORO M., FALLAH RAMAZANI V., FATTORINI A., FERRARA G., FONSECA M.V., FONT L., FRUCK C., FUKAMI S., GARCIA LOPEZ R.J., GARCZARCZYK M., GASPARYAN S., GAUG M., GIGLIETTO N., GIORDANO F., GLIWNY P., GODINOVIC N., GREEN J.G., GREEN D., HADASCH D., HAHN A., HECKMANN L., HERRERA J., HOANG J., HRUPEC D., HUTTEN M., INADA T., INOUE S., ISHIO K., IWAMURA Y., JIMENEZ I., JORMANAINEN J., JOUVIN L., KAJIWARA Y., KARJALAINEN M., KERSZBERG D., KOBAYASHI Y., KUBO H., KUSHIDA J., LAMASTRA A., LELAS D., LEONE F., LINDFORS E., LOMBARDI S., LONGO F., LOPEZ-COTO R., LOPEZ-MOYA M., LOPEZ-ORAMAS A., LOPORCHIO S., MACHADO DE OLIVEIRA FRAGA B., MAGGIO C., MAJUMDAR P., MAKARIEV M., MALLAMACI M., MANEVA G., MANGANARO M., MARASCHI L., MARIOTTI M., MARTINEZ M., MAZIN D., MENCHIARI S., MENDER S., MICANOVIC S., MICELI D., MIENER T., MINEV M., MIRANDA J.M., MIRZOYAN R., MOLINA E., MORALEJO A., MORCUENDE D., MORENO V., MORETTI E., NEUSTROEV V., NIGRO C., NILSSON K., NISHIJIMA K., NODA K., NOZAKI S., OHTANI Y., OKA T., OTERO-SANTOS J., PAIANO S., PALATIELLO M., PANEQUE D., PAOLETTI R., PAREDES J.M., PAVLETIC L., PENIL P., PERENNES C., PERSIC M., PRADA MORONI P.G., PRANDINI E., PRIYADARSHI C., PULJAK I., RIBO M., RICO J., RIGHI C., RUGLIANCICH A., SAHA L., SAHAKYAN N., SAITO T., SAKURAI S., SATALECKA K., SATURNI F.G., SCHMIDT K., SCHWEIZER T., SITAREK J., SNIDARIC I., SOBCZYNSKA D., SPOLON A., STAMERRA A., STROM D., STRZYS M., SUDA Y., SURIC T., TAKAHASHI M., TAVECCHIO F., TEMNIKOV P., TERZIC T., TESHIMA M., TOSTI L., TRUZZI S., TUTONE A., UBACH S., VAN SCHERPENBERG J., VANZO G., VAZQUEZ ACOSTA M., VENTURA S., VERGUILOV V., VIGORITO C.F., VITALE V., VOVK I., WILL M., WUNDERLICH C., ZARIC D. (The FACT Collaboration), BAACK D., BALBO M., BIEDERBECK N., BILAND A., BRETZ T., BUSS J., DORNER D., EISENBERGER L., ELSAESSER D., HILDEBRAND D., IOTOV R., MANNHEIM K., NEISE D., NOETHE M., PARAVAC A., RHODE W., SCHLEICHER B., SLIUSAR V., WALTER R. (The Other Groups and Collaboration), D'AMMANDO F., HORAN D., LIEN A.Y., BALOKOVIC M., MADEJSKI G.M., PERRI M., VERRECCHIA F., LETO C., LAHTEENMAKI A., TORNIKOSKI M., RAMAKRISHNAN V., JARVELA E., VERA R.J.C., CHAMANI W., VILLATA M., RAITERI C.M., GUPTA A.C., PANDEY A., FUENTES A., AGUDO I., CASADIO C., SEMKOV E., IBRYAMOV S., MARCHINI A., BACHEV R., STRIGACHEV A., OVCHAROV E., BOZHILOV V., VALCHEVA A., ZAHARIEVA E., DAMLJANOVIC G., VINCE O., LARIONOV V.M., BORMAN G.A., GRISHINA T.S., HAGEN-THORN V.A., KOPATSKAYA E.N., LARIONOVA E.G., LARIONOVA L.V., MOROZOVA D.A., NIKIFOROVA A.A., SAVCHENKO S.S., TROITSKIY I.S., TROITSKAYA Y.V., VASILYEV A.A., MERKULOVA O.A., CHEN W.P., SAMAL M., LIN H.C., MOODY J.W., SADUN A.C., JORSTAD S.G., MARSCHER A.P., WEAVER Z.R., FEIGE M., KANIA J., KOPP M., KUNKEL L., REINHART D., SCHERBANTIN A., SCHNEIDER L., LOREY C., ACOSTA-PULIDO J.A., CARNERERO M.I., CAROSATI D., KURTANIDZE S.O., KURTANIDZE O.M., NIKOLASHVILI M.G., CHIGLADZE R.A., IVANIDZE R.Z., KIMERIDZE G.N., SIGUA L.A., JONER M.D., SPENCER M., GIROLETTI M., MARCHILI N., RIGHINI S., RIZZI N. and BONNOLI G.

Abstract (from CDS):


Aims. We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with a special focus on the multi-band flux correlations.
Methods. The dataset has been collected through an extensive multi-wavelength campaign organised between 2016 December and 2017 June. The instruments involved are MAGIC, FACT, Fermi-LAT, Swift, GASP-WEBT, OVRO, Medicina, and Metsahovi. Additionally, four deep exposures (several hours long) with simultaneous MAGIC and NuSTAR observations allowed a precise measurement of the falling segments of the two spectral components.
Results. The very-high-energy (VHE; E > 100 GeV) gamma rays and X-rays are positively correlated at zero time lag, but the strength and characteristics of the correlation change substantially across the various energy bands probed. The VHE versus X-ray fluxes follow different patterns, partly due to substantial changes in the Compton dominance for a few days without a simultaneous increase in the X-ray flux (i.e., orphan gamma-ray activity). Studying the broadband spectral energy distribution (SED) during the days including NuSTAR observations, we show that these changes can be explained within a one-zone leptonic model with a blob that increases its size over time. The peak frequency of the synchrotron bump varies by two orders of magnitude throughout the campaign. Our multi-band correlation study also hints at an anti-correlation between UV-optical and X-ray at a significance higher than 3σ. A VHE flare observed on MJD 57788 (2017 February 4) shows gamma-ray variability on multi-hour timescales, with a factor ten increase in the TeV flux but only a moderate increase in the keV flux. The related broadband SED is better described by a two-zone leptonic scenario rather than by a one-zone scenario. We find that the flare can be produced by the appearance of a compact second blob populated by high energetic electrons spanning a narrow range of Lorentz factors, from γ'min=2x104 to γ'max=6x105.

Abstract Copyright: © MAGIC Collaboration et al. 2021

Journal keyword(s): galaxies: active - BL Lacertae objects: individual: Mrk 421 - radiation mechanisms: non-thermal

VizieR on-line data: <Available at CDS (J/A+A/655/A89): fig1.dat fig2.dat mjd57757.dat mjd57785.dat mjd57813.dat mjd57840.dat mjd57788.dat mjd57786.dat mjd57789.dat figc1.dat figc2.dat figc3.dat figc4.dat>

Simbad objects: 4

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2021A&A...655A..89M and select 'bookmark this link' or equivalent in the popup menu