5 papers
Multi-Band Optical Variability Characteristics of the -ray emitting blazar 1ES 0647+250 during its 2020 flare
K. Subbu Ulaganatha Pandian, C. S. Stalin, S. Muneer +4
We present a multi-band optical variability study of the -ray emitting high-synchrotron-peaked blazar 1ES~0647+250 during its enhanced optical activity in 2020. The analysis uti…
Identification of Large-Scale (>100 kpc) Radio Jets in Narrow-Line Seyfert 1 Galaxies
S. Umayal, Vaidehi S. Paliya, D. J. Saikia +3
Powerful, large-scale relativistic jets are usually associated with massive, old elliptical galaxies. This paradigm has recently been challenged by the identification of narrow-lin…
Spectroscopic Reverberation Mapping for SARM: The Case of Mrk 1048 and Mrk 618
Shivangi Pandey, Suvendu Rakshit, S. Muneer +14
Robust extragalactic distance measurements are crucial for resolving the persistent discrepancy in the value of the Hubble constant (H)). Active Galactic Nuclei (AGNs), through…
Discovery of Changing-Look behavior in AGN NGC 3822: A long-term multiwavelength study
Narendranath Layek, Prantik Nandi, Sachindra Naik +7
We present a comprehensive long-term multi-wavelength study of the active galactic nucleus (AGN) NGC 3822, based on 17 years (2008 to 2025) of X-ray, ultraviolet (UV), and optical…
The Detection of Teraelectronvolt Radiation from a Flat Spectrum Radio Quasar
Vaidehi S. Paliya, Markus Bottcher, Kiran Wani +5
The very high-energy (VHE; 100 GeV) radiation carries the signatures of the matter-energy interaction in some of the most extreme astrophysical environments. Considering broad e…