Preprint PUBDB-2025-00614

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png
Constraints on VHE gamma-ray emission of Flat Spectrum Radio Quasars with the MAGIC telescopes

 ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;  ;

2024

 GO

This record in other databases:  

Report No.: arXiv:2403.13713

Abstract: Flat spectrum radio quasars (FSRQs) constitute a class of jetted active galaxies characterized by a very luminous accretion disk, prominent and rapidly moving line-emitting cloud structures (Broad Line Region, BLR), and a surrounding dense dust structure known as dusty torus. The intense radiation field of the accretion disk strongly determines the observational properties of FSRQs. While hundreds of such sources have been detected at GeV energies, only a handful of them exhibit emission in the very-high-energy (VHE, E $\gtrsim 100$ GeV) range. This study presents the results and interpretation derived from a cumulative observation period of 174 hours dedicated to nine FSRQs conducted with the MAGIC telescopes from 2008 to 2020. Our findings indicate no statistically significant ($\geq$ 5 $\sigma$) signal for any of the studied sources, resulting in upper limits on the emission within the VHE energy range. In two of the sources, we derived quite stringent constraints on the $\gamma$-ray emission in the form of upper limits. Our analysis focuses on modeling the VHE emission of these two sources in search for hints of absorption signatures within the broad line region (BLR) radiation field. For these particular sources, constraints on the distance between the emission region and the central black hole are derived using a phenomenological model. Subsequently, these constraints are tested using a framework based on a leptonic model.

Keyword(s): model: leptonic ; gamma ray: VHE ; gamma ray: emission ; MAGIC ; GeV ; quasar ; accretion ; blazar ; structure ; black hole ; torus ; absorption ; cloud ; signature ; galaxy


Note: about to be submitted to MNRAS (SFB1491)and by the Lamarr-Institute for Machine Learning and ArtificialIntelligence

Contributing Institute(s):
  1. Gammaastronomie (Z_GA)
Research Program(s):
  1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)
  2. MessMapp - Mapping Highly-Energetic Messengers throughout the Universe (949555) (949555)
Experiment(s):
  1. Major Atmospheric Gamma Imaging Cherenkov

Appears in the scientific report 2024
Database coverage:
Published
Click to display QR Code for this record

The record appears in these collections:
Private Collections > >DESY > >ZEUTHEN > Z_GA
Document types > Reports > Preprints
Public records
Publications database


Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Contribution to a conference proceedings/Journal Article  ;  ;  ; et al
Constraints on VHE gamma-ray emission of flat spectrum radio quasars with the MAGIC telescopes
38th International Cosmic Ray Conference, ICRC2023, NagoyaNagoya, Japan, 26 Jul 2023 - 3 Aug 20232023-07-262023-08-03 Monthly notices of the Royal Astronomical Society 535(2), 1484 - 1506 () [10.1093/mnras/stae2313]  GO OpenAccess  Download fulltext Files  Download fulltextFulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS


 Record created 2025-02-03, last modified 2025-02-09


Restricted:
Download fulltext PDF Download fulltext PDF (PDFA)
External link:
Download fulltextFulltext by arXiv.org
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)