dc.contributor.author |
Reshma, M |
|
dc.contributor.author |
Agarwal, Aditi |
|
dc.contributor.author |
Stalin, C. S |
|
dc.contributor.author |
Joseph, P |
|
dc.contributor.author |
Dagore, A |
|
dc.contributor.author |
Mandal, A. K |
|
dc.contributor.author |
Devaraj, A |
|
dc.contributor.author |
Gudennavar, S. B |
|
dc.date.accessioned |
2024-12-05T06:03:58Z |
|
dc.date.available |
2024-12-05T06:03:58Z |
|
dc.date.issued |
2024-11-01 |
|
dc.identifier.citation |
The Astrophysical Journal, Vol. 975, No. 1, 6 |
en_US |
dc.identifier.issn |
1538-4357 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/8600 |
|
dc.description |
Open Access |
en_US |
dc.description |
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title
of the work, journal citation and DOI |
|
dc.description |
https://doi.org/10.3847/1538-4357/ad702e |
|
dc.description.abstract |
Blazars, the peculiar class of active galactic nuclei, are known to show flux variations across the accessible electromagnetic spectrum. Though they have been studied extensively for their flux variability characteristics across wavelengths, information on their ultraviolet (UV) flux variations on timescales of hours is very limited. Here, we present the first UV flux variability study on intraday timescales of a sample of ten blazars comprising two flat-spectrum radio quasars (FSRQs) and eight BL Lacertae objects (BL Lacs). These objects, spanning a redshift (z) range of 0.034 ≤ z ≤ 1.003, were observed in the far-UV (1300−1800 Å) and near-UV (2000−3000 Å) wavebands using the ultraviolet imaging telescope on board AstroSat. UV flux variations on timescales of hours were detected in nine sources out of the observed ten blazars. The spectral variability analysis showed a bluer-when-brighter trend with no difference in the UV spectral variability behavior between the studied sample of FSRQs and BL Lacs. The observed UV flux and spectral variability in our sample of both FSRQs and BL Lacs revealed that the observed UV emission in them is dominated by jet synchrotron process. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
American Astronomical Society |
en_US |
dc.rights |
© 2024. The Author(s) |
|
dc.subject |
Active galactic nuclei |
en_US |
dc.subject |
Blazars |
en_US |
dc.subject |
BL Lacertae objects |
en_US |
dc.subject |
Flatspectrum radio quasars |
en_US |
dc.subject |
Ultraviolet photometry |
en_US |
dc.title |
Ultraviolet flux and spectral variability study of blazars observed with UVIT/AstroSat |
en_US |
dc.type |
Article |
en_US |