Dr Debbijoy Bhattacharya

Associate Professor



    Debbijoy Bhattacharya is Associate Professor of Astronomy and Astrophysics in the Manipal Centre for Natural Sciences (MCNS).


    • Conducts independent research in astrophysics.
    • Publishes research results in high quality peer reviewed National and International science journals.
    • Guides, teaches and trains PhD students.
    • Represent MCNS, Manipal University at various national and international science conferences, symposiums and meetings.
    • Conducts collaborative research with other leading national and international research institutes and universities.
    • Participates in science outreach program. 


Subject Semester / Year
Basic Astrophysics, Error analysis, Computational Physics


Degree Specialisation Institute Year of passing
PhD Astronomy and Astrophysics ISRO Satellite Centre and Indian Institute of Science (IISc) 2009
MSc Electronics Banaras Hindu University 2002
BSc Physics (Hons) University of Calcutta 2000


Institution / Organisation Designation Role Tenure
Manipal Centre for Natural Sciences (MCNS) Assistant Professor
Inter University Centre for Astronomy and Astrophysics (IUCAA) Postdoctoral Research Fellow 2011-2012
Indian Institute of Science (IISc) Research Associate 2009-2011


Area of Interest

Astronomy and Astrophysics

Area of Expertise

High Energy Astrophysics

Area of Research

High energy diffuse emissions, active galaxies, SED modelling, dynamics of accretion disk, spin of black hole, x-ray binaries, x-ray and gamma-ray spectral and timing study of astrophysical objects, construct and modelling of broadband spectral energy distribution of active galaxies utilising multi-wavelength observations

Professional Affiliations & Contributions

  • Member of Science working group of India's first dedicated X-ray Polarimetry mission "XPOSat"
  • Visiting Assosiate of Inter-University Centre for Astronomy & AstroPhysics (IUCAA)
  • Cordinator of IUCAA centre for Astronomy Research and Development (ICARD)

Intra-night optical variability of misaligned active galaxies

2018-07-12 Sanna Gulati C S Stalin

Monthly Notices of the Royal Astronomical Society. page no: 3382–3389; Vol:483 (3)

Correlating nonlinear properties with spectral states of RXTE data: Possible observational evidences for four different accretion modes around compact objects

2018-29-01 Oluwashina Adegoke Prasun Dhang Banibrata Mukhopadhyay M. C. Ramadevi

Monthly Notices of the Royal Astronomical Society. Vol:476 (2); Page:1581–1595

Unusual long-term low-activity states of EGRET blazars in the Fermi era

2017-08-11 Mohana A, Krishna Gulati,Sanna Bhattacharyya, Subir Bhatt,Nilay Sreekumar,P Stalin, C. S.

Monthly Notices of the Royal Astronomical Society. Page No:5008-5017; Vol:471(4)

Does black hole spin play a key role in the FSRQ/BL Lac dichotomy?

2013-13-02 Parameswaran Sreekumar Banibrata Mukhopadhyay Ishan Tomar

Research in Astronomy and Astrophysics, Vol:16(54), Page:1-8

The uncorrelated long term gamma-ray and X-ray variability of blazars and its implications on disk-jet coupling.

2013-25-03 Ranjeev Misra A. R. Rao P.Sreekumar

Monthly Notices of Royal Astronomical Society (MNRAS), Vol 431,Page:1618-1624

Observational evidences for spinning black holes: a proof of general relativity for space time around rotating black holes.

2012-13-11 Banibrata Mukhopadhyay P. Sreekumar

International Journal of Modern Physics, D 21 (11), 1250086 (19 pages). World Scientific Publishing, Singapore

Contributions from radio-loud AGNs to the extragalactic gamma-ray background (EGRB)

2011-11-01 P. Sreekumar M. Boettcher R. Mukherjee M. Errando

The 3rd Fermi Symposium, Rome, Italy, Debbijoy Bhattacharya

Disk-outflow coupling: Energetics around spinning black holes

2010-18-03 Shubhrangshu Ghosh Banibrata Mukhopadhyay

Astrophysical Journal (ApJ), Vol 713;Page 105-114.

Contribution from unresolved discrete sources to the extragalactic gamma-ray background (EGRB)

2009-10-07 P. Sreekumar R. Mukherjee

Research in Astronomy and Astrophysics (RAA), Vol 9;Page:1205-1214 .

Gamma-ray luminosity function of gamma-ray bright AGNs

2009-17-12 P. Sreekumar R. Mukherjee

Research in Astronomy and Astrophysics (RAA), Vol:9; Page:85-94.

Contribution to the extragalactic gamma-ray background from discrete sources

2007-05-02 P. Sreekumar R. Mukherjee

First Fermi Symposium, Stanford university, USA, AIP Proceedings. Vol:921; Page:480-481.

SLX 1746-311 in outburst

2006-12-01 K. C Shyama Narendranath M. C. Ramadevi M. Sudhakar P. Sreekumar S. Seetha

Advances in space research. Vol:38, Page:2788-2790 .

Contribution from normal galaxies to the extragalactic gamma-ray background

2005-25-08 Parameswaran Sreekumar

BASI. Vol:33, Page:407-408.