A4 Refereed article in a conference publication
Discovery of TXS 1515-273 at VHE gamma rays and modelling of its Spectral Energy Distribution
Authors: D'Ammando F., Nabizadeh A., Bissaldi E., Orienti M., Cutini S., Acciari V.A., Ansoldi S., Antonelli L.A., Arbet Engels A., Artero M., Asano K., Baack D., Babić A., Baquero A., Barres de Almeida U., Barrio J.A., Batković I., Becerra González J., Bednarek W., Bellizzi L., Bernardini E., Bernardos M., Berti A., Besenrieder J., Bhattacharyya W., Bigongiari C., Biland A., Blanch O., Bökenkamp H., Bonnoli G., Bošnjak , 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 Espiñeira E., Dominis Prester D., Donini A., Dorner D., Doro M., Elsaesser D., Fallah Ramazani V., Fattorini A., Fonseca M.V., Font L., Fruck C., Fukami S., Fukazawa Y., García López R.J., Garczarczyk M., Gasparyan S., Gaug M., Giglietto N., Giordano F., Gliwny P., Godinović N., Green J.G., Green D., Hadasch D., Hahn A., Heckmann L., Herrera J., Hoang J., Hrupec D., Hütten M., Inada T., Ishio K., Iwamura Y., Jiménez Martínez I., Jormanainen J., Jouvin L., Karjalainen M., Kerszberg D., Kobayashi Y., Kubo H., Kushida J., Lamastra A., Lelas D., Leone F., Lindfors E., Linhoff L., Lombardi S., Longo F., López-Coto R., López-Moya M., López-Oramas A., Loporchio S., Machado de Oliveira Fraga B., Maggio C., Majumdar P., Makariev M., Mallamaci M., Maneva G., Manganaro M., Mannheim K., Maraschi L., Mariotti M., Martínez M., Mazin D., Menchiari S., Mender S., Mićanović S., Miceli D., Miener T., Miranda J.M., Mirzoyan R., Molina E., Moralejo A., Morcuende D., Moreno V., Moretti E., Nakamori T., Nava L., 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., Pavletić L., Peñil P., Persic M., Pihet M., Prada Moroni P.G., Prandini E., Priyadarshi C., Puljak I., Rhode W., Ribó M., Rico J., Righi C., Rugliancich A., Sahakyan N., Saito T., Sakurai S., Satalecka K., Saturni F.G., Schleicher B., Schmidt K., Schweizer T., Sitarek J., Šnidarić I., Sobczynska D., Spolon A., Stamerra A., Strišković J., Strom D., Strzys M., Suda Y., Surić T., Takahashi M., Takeishi R., Tavecchio F., Temnikov P., Terzić 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., Yamamoto T., Zarić D.
Editors: N/A
Conference name: International Cosmic Ray Conference
Publisher: Sissa Medialab Srl
Publication year: 2022
Journal: POS Proceedings of Science
Book title : 37th International Cosmic Ray Conference (ICRC2021)
Journal name in source: Proceedings of Science
Series title: POS Proceedings of Science
Volume: 395
First page : 801
ISSN: 1824-8039
DOI: https://doi.org/10.22323/1.395.0801
Web address : https://pos.sissa.it/395/801
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/178546403
In February 2019, a flaring state of the extreme blazar candidate TXS 1515-273 was registered by the Fermi-LAT, which triggered observations with the MAGIC telescopes and the X-ray satellites Swift, XMM-Newton and NuStar. The observations led to the discovery of the source at very-high-energy (VHE, 100 GeV < E < $ 100 TeV) gamma-ray energies and the detection of short time scales of variability (1 h) in several X-ray bands.
The analysis of the observed variability helped us to constrain the physical parameters of the emission region. Thanks to the high-quality X-ray data, the synchrotron peak location was determined. The
source was classified as a high synchrotron peaked source during the flaring activity. We constructed the broadband spectral energy distribution from radio to TeV. We interpreted it assuming leptonic emission and taking into account the constraints from the X-ray variability. We tested two scenarios: a simple one-zone model and a two-component model. Both models were found to describe the data well from X-ray to VHE gamma ray, but the two-zone model allows for a more accurate modelling of the emission at radio and optical energies.
Downloadable publication This is an electronic reprint of the original article. |  |
