Detection of X-ray polarization in the high synchrotron peaked blazar 1ES 1959+650
- Title
- Detection of X-ray polarization in the high synchrotron peaked blazar 1ES 1959+650
- Creator
- Bharathan A.M.; Stalin C.S.; Chatterjee R.; Sahayanathan S.; Pal I.; Mathew B.; Agrawal V.K.
- Description
- We report the measurement of X-ray polarization in the high synchrotron peaked blazar 1ES 1959+650. Of the four epochs of observations from the Imaging X-ray Polarimetry Explorer, we detected polarization in the 28 keV band on two epochs. From the model-independent analysis of the observations on 28 October 2022, in the 28 keV band, we found the degree of polarization of ?X=9.01.6% and an electric vector position angle of ?X=535 deg. Similarly, from the observations on 14 August 2023, we found ?X and ?X values as 12.50.7% and 202 deg, respectively. These values are also in agreement with the values obtained from spectro-polarimetric analysis of the I, Q, and U spectra. The measured X-ray polarization is larger than the reported optical values, ranging between 2.5% and 9% when observed from 2008 to 2018. Broadband spectral energy distribution constructed for the two epochs is well described by the one-zone leptonic emission model with the bulk Lorentz factor (?) of the jet larger on 14 August 2023 compared to 28 October 2022. Our results favor the shock acceleration of the particles in the jet, with the difference in ?X between the two epochs being influenced by a change in the ? of the jet. Indian Academy of Sciences 2024.
- Source
- Journal of Astrophysics and Astronomy, Vol-45, No. 2
- Date
- 2024-01-01
- Publisher
- Springer
- Subject
- BL Lacertae objects: individual: 1ES 1959+650; galaxies: active; Techniques: polarimetric; X-rays: galaxies
- Coverage
- Bharathan A.M., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, India; Stalin C.S., Indian Institute of Astrophysics, Block II, Koramangala, Bangalore, 560034, India; Chatterjee R., Space Astronomy Group, ISITE Campus, U. R. Rao Satellite Centre, Bangalore, 560037, India; Sahayanathan S., Astrophysical Sciences Division, Bhabha Atomic Research Centre, Mumbai, 400085, India, Homi Bhabha National Institute, Mumbai, 400094, India; Pal I., Indian Institute of Astrophysics, Block II, Koramangala, Bangalore, 560034, India; Mathew B., Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, India; Agrawal V.K., Space Astronomy Group, ISITE Campus, U. R. Rao Satellite Centre, Bangalore, 560037, India
- Rights
- Restricted Access
- Relation
- ISSN: 2506335
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Bharathan A.M.; Stalin C.S.; Chatterjee R.; Sahayanathan S.; Pal I.; Mathew B.; Agrawal V.K., “Detection of X-ray polarization in the high synchrotron peaked blazar 1ES 1959+650,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 24, 2025, https://archives.christuniversity.in/items/show/12623.