Time-varying polarized gamma-rays from GRB 160821A: evidence for ordered magnetic fields

Simple item page
dc.contributor.authorSharma, Vidushi
dc.contributor.authorIyyani, Shabnam
dc.contributor.authorBhattacharya, Dipankar
dc.contributor.authorChattopadhyay, Tanmoy
dc.contributor.authorRao, A. R.
dc.contributor.authorAarthy, E.
dc.contributor.authorVadawale, Santosh V.
dc.contributor.authorMithun, N. P. S.
dc.contributor.authorBhalerao, Varun B.
dc.contributor.authorRyde, Felix
dc.contributor.authorPe'er, Asaf
dc.date.accessioned2019-10-23T09:43:57Z
dc.date.available2019-10-23T09:43:57Z
dc.date.issued2019-09-03
dc.description.abstractGRB 160821A is the third most energetic gamma-ray burst observed by the Fermi gamma-ray space telescope. Based on the observations made by the Cadmium Zinc Telluride Imager on board AstroSat, here we report the most conclusive evidence to date of (i) high linear polarization ( detection), and (ii) variation of polarization angle with time, occurring twice during the rise and decay phase of the burst at 3.5σ and 3.1σ detections, respectively. All confidence levels are reported for two parameters of interest. These observations strongly suggest synchrotron radiation produced in magnetic field lines that are highly ordered on angular scales of 1/Γ, where Γ is the Lorentz factor of the outflow.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleidL10en
dc.identifier.citationSharma, V., Iyyani, S., Bhattacharya, D., Chattopadhyay, T., Rao, A. R., Aarthy, E., Vadawale, S. V., Mithun, N. P. S., Bhalerao, V. B., Ryde, F. and Pe’er, A. (2019) 'Time-varying Polarized Gamma-Rays from GRB 160821A: Evidence for Ordered Magnetic Fields', The Astrophysical Journal, 882(1), L10. (9pp.) DOI:10.3847/2041-8213/ab3a48en
dc.identifier.doi10.3847/2041-8213/ab3a48en
dc.identifier.eissn2041-8213
dc.identifier.endpage9en
dc.identifier.issn2041-8205
dc.identifier.journaltitleAstrophysical Journal Lettersen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/8840
dc.identifier.volume882en
dc.language.isoenen
dc.publisherInstitute of Physics Publishingen
dc.relation.urihttps://iopscience.iop.org/article/10.3847/2041-8213/ab3a48
dc.rights©2019. The American Astronomical Society. All rights reserved.en
dc.subjectGamma-ray bursten
dc.subjectHigh energy astrophysicsen
dc.subjectMagnetic fieldsen
dc.titleTime-varying polarized gamma-rays from GRB 160821A: evidence for ordered magnetic fieldsen
dc.typeArticle (peer-reviewed)en
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Sharma_2019_ApJL_882_L10.pdf
Size:
984.81 KB
Format:
Adobe Portable Document Format
Description:
Published version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Physics - Journal Articles