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Browsing by Author "Ojha, Devendra K"

Browsing by Author "Ojha, Devendra K"

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  • A catalogue of 108 extended planetary nebulae observed by GALEX 
    Pradhan, Ananta C; Panda, Swayamtrupta; Parthasarathy, M; Murthy, J; Ojha, Devendra K (Springer, 2019-10)
    We present the ultraviolet (UV) imaging observation of planetary nebulae (PNe) using archival data of Galaxy Evolution Explorer (GALEX). We found 358 PNe detected by GALEX in near-UV (NUV). We have compiled a catalogue of ...
  • Gaia 20eae: A Newly Discovered Episodically Accreting Young Star 
    Ghosh, Arpan; Sharma, Saurabh; Ninan, Joe P; Ojha, Devendra K; Bhatt, B. C; Kanodia, Shubham; Mahadevan, Suvrath; Stefansson, Gudmundur; Yadav, R. K; Gour, A. S; Pandey, Rakesh; Sinha, Tirthendu; Panwar, Neelam; Wisniewski, John P; Canas, Caleb I; Lin, Andrea S. J; Roy, Arpita; Hearty, Fred; Ramsey, Lawrence; Robertson, Paul; Schwab, Christian (American Astronomical Society, 2022-02-10)
    The Gaia Alert System issued an alert on 2020 August 28, on Gaia 20eae when its light curve showed a ∼4.25 magnitude outburst. We present multiwavelength photometric and spectroscopic follow-up observations of this source ...
  • Globular Cluster UVIT Legacy Survey (GlobULeS) – II. Evolutionary status of hot stars in M3 and M13 
    Kumar, Ranjan; Pradhan, Ananta C; Sahu, Snehalata; Subramaniam, A; Piridi, Sonika; Cassisi, Santi; Ojha, Devendra K (Oxford University Press on behalf of Royal Astronomical Society, 2023-06)
    We present a far-ultraviolet (FUV) study of hot stellar populations in the second parameter pair globular clusters (GCs) M3 and M13, as a part of the GC UVIT Legacy Survey programme (GlobULeS). We use observations made ...
  • Post-outburst Evolution of Bona Fide FU Ori-type V2493 Cygnus: A Spectro-photometric Monitoring 
    Ghosh, Arpan; Sharma, Saurabh; Ninan, Joe P; Ojha, Devendra K; Bhatt, B. C; Sahu, D. K; Baug, Tapas; Yadav, R. K; Irawati, Puji; Gour, A. S; Panwar, Neelam; Pandey, Rakesh; Sinha, Tirthendu; Verma, Aayushi (American Astronomical Society, 2023-09-01)
    We present here the results of 8 yr of our near-simultaneous optical–near-infrared spectro-photometric monitoring of the bona fide FU Ori (FUor)-type candidate V2493 Cygnus (V2493 Cyg) starting from 2013 September to 2021 ...
  • Study of UV bright sources in globular cluster NGC 4590 using Ultraviolet Imaging Telescope (UVIT) observations 
    Kumar, Ranjan; Pradhan, Ananta C; Parthasarathy, M; Piridi, Sonika; Cassisi, Santi; Ojha, Devendra K; Mohapatra, Abhisek; Murthy, J (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    We have studied ultraviolet (UV) bright sources in the Galactic globular cluster (GGC) NGC 4590 using Ultraviolet Imaging Telescope onboard the AstroSat satellite. Using UV-optical colour–magnitude diagrams (CMDs), we ...

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