43 citations · 91 across the 7 of their papers we have counts for
7 papers
Far-Ultraviolet Spectroscopy Of Active Galactic Nuclei With AstroSat/UVIT
Shrabani Kumar, G. C. Dewangan, K. P. Singh +4
$\require{mediawiki-texvc}$ We study accretion disk emission from eight Seyfert active galactic nuclei (AGN) using far ultra-violet ( ) slit-less grating sp…
Contrasting X-ray/UV time-lags in Seyfert 1 galaxies NGC 4593 and NGC 7469 using AstroSat observations
Kavita Kumari, G. C. Dewangan, I. E. Papadakis +6
We study accretion disk-corona connection in Seyfert 1 galaxies using simultaneous UV/X-ray observations of NGC 4593 (July 14-18, 2016) and NGC 7469 (October 15-19, 2017) performed…
A comprehensive rotational study of astronomical iso-pentane within 84 to 111 GHz
Anshika Pandey, Satyam Srivastav, Akant Vats +2
The rotational line survey by ALMA (Atacama Large Millimeter/submillimeter Array) recently revealed the presence of i-C3H7CN (i-PrCN) and n-C3H7CN (n-PrCN) in 3-mm atmospheric wind…
AstroSat/UVIT observations of IC4329A: Constraining the accretion disc inner radius
G. C. Dewangan, P. Tripathi, I. E. Papadakis +1
We present a study of far and near-ultraviolet emission from the accretion disk in a powerful Seyfert 1 galaxy IC4329A using observations performed with the Ultraviolet Imaging Tel…
Structure and variability in the corona of the ultrafast rotator LO Peg
S. Lalitha, J. H. M. M. Schmitt, K. P. Singh
Low-mass ultrafast rotators show the typical signatures of magnetic activity and are known to produce flares, probably as a result of magnetic reconnection. As a consequence, the c…
High Energy Emission Processes in OJ 287 during 2009 Flare
Pankaj Kushwaha, S. Sahayanathan, K. P. Singh
The broadband spectrum of a BL Lac object, OJ 287, from radio to -rays obtained during a major -ray flare detected by \emph{Fermi} in 2009 are studied to understand the high…
A Dust Lane in the Radio galaxy 3C270
Ashish Mahabal, Ajit Kembhavi, ; K. P. Singh +2
We present broad band surface photometry of the radio galaxy 3C270 (NGC~4261). We find a distinct dust lane in the image of the galaxy, and determine its orientation and size…