English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Probing the Cyclotron line characteristics of 4U 1538–522 using AstroSat-LAXPC

Varun, Maitra, C., Pradhan, P., Raichur, H., & Paul, B. (2018). Probing the Cyclotron line characteristics of 4U 1538–522 using AstroSat-LAXPC. Monthly Notices of the Royal Astronomical Society: Letters, 484(1), L1-L6. doi:10.1093/mnrasl/sly234.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-205C-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-205D-F
Genre: Journal Article

Files

show Files
hide Files
:
Probing the Cyclotron line characteristics of 4U 1538–522 using AstroSat-LAXPC.pdf (Any fulltext), 2MB
 
File Permalink:
-
Name:
Probing the Cyclotron line characteristics of 4U 1538–522 using AstroSat-LAXPC.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Varun, Author
Maitra, Chandreyee1, Author              
Pradhan, Pragati, Author
Raichur, Harsha, Author
Paul, Biswajit, Author
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

Content

show
hide
Free keywords: -
 Abstract: We report the first report on cyclotron line studies with the LAXPC instrument onboard AstroSat of the high-mass X-ray binary pulsar 4U 1538–52. During the observation of source that spanned about 1 d with a net exposure of 50 ks, the source X-ray flux remained constant. Pulse profile is double peaked in low-energy range and has a single peak in high-energy range, the transition taking place around the cyclotron line energy of the source. Cyclotron scattering feature (CRSF) is detected at ∼22 keV with a very high significance in phase-averaged spectrum. It is one of the highest signal to noise ratio detections of CRSF for this source. We performed detailed pulse-phase-resolved spectral analysis with 10 independent phase bins. We report the results of pulse-phase-resolved spectroscopy of the continuum and CRSF parameters. The cyclotron line parameters show pulse phase dependence over the entire phase with a CRSF energy variation of ∼13 per cent⁠, which is in agreement with previous studies. We also confirm the increase in the centroid energy of the CRSF observed between the 1996–2004 (RXTE) and the 2012 (Suzaku) observations, reinforcing that the increase was a long-term change.

Details

show
hide
Language(s):
 Dates: 2018-12-13
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnrasl/sly234
Other: LOCALID: 3176913
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society: Letters
  Other : Mon. Not. Roy. Astron. Soc.: Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : OXFORD UNIV PRESS
Pages: - Volume / Issue: 484 (1) Sequence Number: - Start / End Page: L1 - L6 Identifier: ISSN: 0035-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000021470