skip to main content

DOE PAGESDOE PAGES

Title: Exploring the multiband emission of TXS 0536+145: the most distant -γray flaring blazar

We report results of a multi-band monitoring campaign of the flat spectrum radio quasar TXS 0536+145 at redshift 2.69. This source was detected during a very high γ-ray activity state in 2012 March by the Large Area Telescope on board Fermi, becoming the γ-ray flaring blazar at the highest redshift detected so far. At the peak of the flare the source reached an apparent isotropic γ-ray luminosity of 6.6×1049 erg s-1 which is comparable to the values achieved by the most luminous blazars. This activity triggered radio-to-X-rays monitoring observations by Swift, Very Long Baseline Array, European VLBI Network, and Medicina single-dish telescope. Significant variability was observed from radio to X-rays supporting the identification of the γ-ray source with TXS 0536+145. Both the radio and γ-ray light curves show a similar behaviour, with the γ-rays leading the radio variability with a time lag of about 4-6 months. The luminosity increase is associated with a flattening of the radio spectrum. No new superluminal component associated with the flare was detected in high resolution parsec-scale radio images. During the flare the γ-ray spectrum seems to deviate from a power law, showing a curvature that was not present during the average activity state. Themore » γ-ray properties of TXS 0536+145 are consistent with those shown by the high-redshift γ-ray blazar population.« less
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [2] ;  [1]
  1. Istituto di Radioastronomia, Bologna (Italy)
  2. Istituto di Radioastronomia, Bologna (Italy); Univ. degli Studi di Bologna (Italy)
  3. Naval Research Lab. (NRL), Washington, DC (United States)
  4. Clemson Univ., SC (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 444; Journal Issue: 4; Journal ID: ISSN 0035-8711
Publisher:
Royal Astronomical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS
OSTI Identifier:
1356454

Orienti, M., D'Ammando, F., Giroletti, M., Finke, J., Ajello, M., Dallacasa, D., and Venturi, T.. Exploring the multiband emission of TXS 0536+145: the most distant -γray flaring blazar. United States: N. p., Web. doi:10.1093/mnras/stu1644.
Orienti, M., D'Ammando, F., Giroletti, M., Finke, J., Ajello, M., Dallacasa, D., & Venturi, T.. Exploring the multiband emission of TXS 0536+145: the most distant -γray flaring blazar. United States. doi:10.1093/mnras/stu1644.
Orienti, M., D'Ammando, F., Giroletti, M., Finke, J., Ajello, M., Dallacasa, D., and Venturi, T.. 2014. "Exploring the multiband emission of TXS 0536+145: the most distant -γray flaring blazar". United States. doi:10.1093/mnras/stu1644. https://www.osti.gov/servlets/purl/1356454.
@article{osti_1356454,
title = {Exploring the multiband emission of TXS 0536+145: the most distant -γray flaring blazar},
author = {Orienti, M. and D'Ammando, F. and Giroletti, M. and Finke, J. and Ajello, M. and Dallacasa, D. and Venturi, T.},
abstractNote = {We report results of a multi-band monitoring campaign of the flat spectrum radio quasar TXS 0536+145 at redshift 2.69. This source was detected during a very high γ-ray activity state in 2012 March by the Large Area Telescope on board Fermi, becoming the γ-ray flaring blazar at the highest redshift detected so far. At the peak of the flare the source reached an apparent isotropic γ-ray luminosity of 6.6×1049 erg s-1 which is comparable to the values achieved by the most luminous blazars. This activity triggered radio-to-X-rays monitoring observations by Swift, Very Long Baseline Array, European VLBI Network, and Medicina single-dish telescope. Significant variability was observed from radio to X-rays supporting the identification of the γ-ray source with TXS 0536+145. Both the radio and γ-ray light curves show a similar behaviour, with the γ-rays leading the radio variability with a time lag of about 4-6 months. The luminosity increase is associated with a flattening of the radio spectrum. No new superluminal component associated with the flare was detected in high resolution parsec-scale radio images. During the flare the γ-ray spectrum seems to deviate from a power law, showing a curvature that was not present during the average activity state. The γ-ray properties of TXS 0536+145 are consistent with those shown by the high-redshift γ-ray blazar population.},
doi = {10.1093/mnras/stu1644},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 4,
volume = 444,
place = {United States},
year = {2014},
month = {9}
}