Browsing by Author "D’Orazio, Daniel J."

Now showing items 1-3 of 3

    • NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes 

      Saade, M. Lynne; Brightman, Murray; Stern, Daniel; Connor, Thomas; Djorgovski, S. G.; D’Orazio, Daniel J.; Ford, K. E. S.; Graham, Matthew J.; Haiman, Zoltán; Jun, Hyunsung D.; Kammoun, Elias; Kraft, Ralph P.; McKernan, Barry; Vikhlinin, Alexei; Walton, Dominic J. (2024-05-01)
      We present an analysis of NuSTAR X-ray observations of three active galactic nuclei (AGN) that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey ...

    • NuSTAR Observations of Candidate Subparsec Binary Supermassive Black Holes 

      Saade, M. Lynne; Brightman, Murray; Stern, Daniel; Connor, Thomas; Djorgovski, S. G.; D’Orazio, Daniel J.; Ford, K. E. S.; Graham, Matthew J.; Haiman, Zoltán; Jun, Hyunsung D.; Kammoun, Elias; Kraft, Ralph P.; McKernan, Barry; Vikhlinin, Alexei; Walton, Dominic J. (2024-05-01)
      We present an analysis of NuSTAR X-ray observations of three active galactic nuclei (AGN) that were identified as candidate subparsec binary supermassive black hole (SMBH) systems in the Catalina Real-Time Transient Survey ...

    • Unusual Hard X-Ray Flares Caught in NICER Monitoring of the Binary Supermassive Black Hole Candidate AT2019cuk/Tick Tock/SDSS J1430+2303 

      Masterson, Megan; Kara, Erin; Pasham, Dheeraj R.; D’Orazio, Daniel J.; Walton, Dominic J.; Fabian, Andrew C.; Lucchini, Matteo; Remillard, Ronald A.; Arzoumanian, Zaven; Burkhonov, Otabek; Choi, Hyeonho; Ehgamberdiev, Shuhrat A.; Ferrara, Elizabeth C.; Guolo, Muryel; Im, Myungshin; Kim, Yonggi; Mirzaqulov, Davron O.; Paek, Gregory S. H.; Sung, Hyun-Il; Yoon, Joh-Na (2023-03-14)
      The nuclear transient AT2019cuk/Tick Tock/SDSS J1430+2303 has been suggested to harbor a supermassive black hole (SMBH) binary near coalescence. We report results from high-cadence NICER X-ray monitoring with multiple ...