30 citations · 108 across the 9 of their papers we have counts for
9 papers · 1 filter
Identifying the 3FHL catalog: VI. Results of the 2019 Gemini optical spectroscopy campaign
M. Rajagopal, L. Marcotulli, K. Labrie +2
Active galactic Nuclei (AGNs) with their relativistic jets pointed toward the observer, are a class of luminous gamma-ray sources commonly known as blazars. The study of this sourc…
Identifying the 3FHL Catalog. VI. Swift Observations of 3FHL Unassociated Objects with Source Classification via Machine Learning
S. Joffre, R. Silver, M. Rajagopal +5
The Third Catalog of Hard Fermi Large Area Telescope Sources (3FHL) reports the detection of 1556 objects at E > 10 GeV. However, 177 sources remain unassociated and 23 are associa…
Revealing high-z Fermi-LAT BL Lacs using Swift and SARA data with photometric analysis
Y. Sheng, M. Rajagopal, A. Kaur +12
BL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a challenge in measuring the redshift…
Identifying the 3FHL catalog: V. Results of the CTIO-COSMOS optical spectroscopy campaign 2019
M. Rajagopal, S. Marchesi, A. Kaur +3
As a follow-up of the optical spectroscopic campaign aimed at achieving completeness in the Third Catalog of Hard Fermi-LAT Sources (3FHL), we present here the results of a sample…
Identifying the 3FHL Catalog. IV. Swift Observations of Unassociated Fermi-LAT 3FHL Sources
Ross Silver, Stefano Marchesi, Lea Marcotulli +3
The Fermi Large Area Telescope (Fermi-LAT) 3FHL catalog is the latest catalog of >10 GeV sources and will remain an important resource for the high-energy community for the foresee…
Hunting distant BL Lacs with the photometric technique using Swift and SARA
M. Rajagopal, A. Kaur, A. Ajello +5
BL Lacertae objects (BL Lacs) represent a large fraction (22\%) of gamma-ray sources in the Third Fermi Large Area Telescope catalog (3FGL). Nearly half of the BL Lac population re…
NuSTAR Observations and multi-wavelength modeling of the high-redshift BL Lac Object 4FGL J2146.5-1344
M. Rajagopal, L. Marcotulli, M. Ajello +3
High synchrotron peak (HSP; Hz) BL Lacs are some of the most extreme accelerators in the Universe. Those found at high redshifts () challenge our under…
NuSTAR perspective on high-redshift MeV blazars
L. Marcotulli, V. Paliya, M. Ajello +7
With bolometric luminosities exceeding erg s, powerful jets and supermassive black holes at their center, MeV blazars are some of the most extreme sources in the U…
Identifying the 3FHL catalog: CTIO results
Abhishek Desai, Stefano Marchesi, Meenakshi Rajagopal +1
Active galactic Nuclei (AGNs) with their relativistic jets pointed towards the observer, form a subclass of luminous gamma-ray sources commonly known as blazars. The study of blaza…