X-ray Astronomy

My research interest includes,

• Orbital Evolution of X-ray Binaries
• Pulse profile evolution
• Broad band X-ray Spectroscopy

MEDIA COVERAGE: Here are the links to my discovery of an extra-solar planet 

https://www.thehindu.com/sci-tech/science/eclipses-of-binary-star-shed-light-on-orbiting-exoplanet/article17757774.ece

https://exoplanetarchive.ipac.caltech.edu/overview/MXB%201658-298%20b

• Ph. D. , 2010 , Department of Physics and Astrophysics, University of Delhi
• M. Sc. Physics , 2005 , Hansraj College, University of Delhi
• B. Sc. (H) Physics , 2003 , Hansraj College, University of Delhi

August 2021 onwards: Professor, Hansraj College, University of Delhi

August 2018 - August 2021: Associate Professor, Hansraj College, University of Delhi

August 2009 - August 2018: Assistant Professor, Hansraj College, University of Delhi

November 2006 - August 2008: Lecturer at Hansraj College, University of Delhi

October 2006 - November 2006: Lecturer at Daulat Ram College, University of Delhi

August 2005 - October 2006: Lecturer at Hansraj College, University of Delhi

Papers taught at the Under-graduate Level

• Applied Quantum Mechanics
• Astronomy and Astrophysics
• Electricity and Magnetism
• Electromagnetic Theory
• Mathematical Physics
• Nuclear and Particle Physics
• Photonics
• Thermal Physics
• Waves and Optics
• Wave Propagation and Antenna

Ph. D. SUPERVISION

Two students are pursuing their Ph. D. under my supervision at the Department of Physics and Astrophysics, University of Delhi

SUPERVISION OF UNDER-GRADUATE PROJECTS

• DBT Sponsored Project on 'Theory of Errors' (Academic Year 2015 - 2016)
• DBT Sponsored Interdisciplinary Project on 'Finding dielectric constant of glass' (Academic Year 2016 - 2017)
• DBT Sponsored Project on 'Study of RC network response' (Academic Year 2016 - 2017)
• DBT Sponsored Project on 'Construction of basic function generator' (Academic Year 2016 - 2017)
• DBT Sponsored Interdisciplinary Project on 'Estimation of Sugar Content' (Academic Year 2017 - 2018)
• DBT Sponsored Project on 'Magnetic Hysteresis' (Academic Year 2017 - 2018)
• Understanding the mysteries of X-ray pulsars (Academic Year 2020 - 2021)
• SED of supernova remnants (Academic Year 2021 - 2022)

Academic Year, 2022- 2023

• Warden: Girls Hostel
• Secretary: Hansraj College Alumni Association
• Member: College Research Council
• Member: Department Infrastructure Committee
• Member: Department Administrative Committee
• Member: Department Moderation Committee

Academic Year, 2021- 2022

• Secretary: Hansraj College Alumni Association
• Convener: Post-graduate admissions of M.Sc. Physics
• Coordinator: Community College, Hansraj College Centre, UGC
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: College Research Council
• Member: Department Infrastructure Committee
• Member: Department Purchase Committee
• Member: Department Workload and Timetable Committee
• Member: Women Development Cell
• Member: Environment Awareness Committee

Academic Year, 2020 - 2021

• Secretary: Hansraj College Alumni Association
• Convener: Under-graduate admissions of B.Sc. (H) Geology
• Convener: Lumen - Physics and Electronics Society for student’s activities
• Deputy Coordinator: Community College, Hansraj College Centre, UGC
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Department Infrastructure Committee
• Member: Women Development Cell
• Member: Environment Awareness Committee
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2019 - 2020

• Secretary: Hansraj College Alumni Association
• Convener: Portal and ICT Enabling Committee of the College
• Convener: Workload Committee (Science) of the College
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Department Infrastructure Committee
• Member: Steering Committee of Department of Physics and Astrophysics for the LOCF based Under-graduate Course Revision
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2018 - 2019

• Secretary: Hansraj College Alumni Association
• Convener (Science) for Mentorship Program of the College
• Convener: Department Infrastructure Committee
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Canteen Committee
• Member: Garden Committee
• Member: Portal and ICT Enabling Committee
• Member: Department Timetable Committee
• Member: Steering Committee of Department of Physics and Astrophysics for the Under-graduate Course Revision
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2017 - 2018 

• Convener: Timetable Committee (Science) 
• Convener (Science) for Mentorship Program of the College
• Convener: Department Library Committee
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Portal and ICT Enabling Committee 
• Member: Department Infrastructure Committee 
• Member: Department Purchase Committee
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2016 - 2017

• Convener: Timetable Committee (Science)
• Convener: Department Admission Committee
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Environment Awareness Committee
• Member: Department Infrastructure Committee
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2015 - 2016

• Deputy Coordinator, Central Evaluation Centre for November-December 2015 Theory Examination
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Secretary: Staff Association
• Member: Student's Welfare and Discipline Committee
• Member: Garden Committee
• Member: Department Purchase Committee
• Member: Department Infrastructure Committee
• Member: Sub-committee of Committee of Courses, Department of Physics and Astrophysics, University of Delhi

Academic Year, 2014 - 2015

• Convener: Canteen Committee
• Superintendent of University Practical Examination (November – December 2014)
• Deputy Superintendent University Theory Examinations (May - June 2015)
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Academic Affairs and Seminar Committee
• Member: Department Timetable Committee
• Member: Department Infrastructure Committee

Academic Year, 2013 - 2014

• Convener: Lumen - The Physics and Electronics Society for student’s activities
• Convener: Under-graduate Admissions in B.Sc. (H) Physics
• Department Coordinator: Star College Scheme of the Department of Biotechnology
• Member: Student's Welfare Committee

Academic Year, 2012 - 2013

• Convener: Under-graduate Admissions in B.Sc. (H) Physics
• Member: Student's Welfare Committee
• Member: Environment Awareness Committee
• Member: Department Infrastructure Committee
• Member: Department Purchase Committee

Academic Year, 2011 - 2012

• Convener: Department Infrastructure Committee
• Convener: Lumen - The Physics and Electronics Society for student’s activities
• Member: Department Timetable Committee (even semester)

Academic Year, 2010 - 2011

• Convener: Lumen - The Physics and Electronics Society for student’s activities

Thesis Title: Study of X-ray Pulsars using Satellite Data, March 2010

1) Academic Year: 2013 – 2015

PI of Innovation Project on 'Understanding the physical and geometrical behaviour of differential equations and its applicability to the real world'. Sponsored by University of Delhi.

2) Academic Year: 2020 - Till date

Co-PI in an on-going international project Co-funded by Erasmus+ program of the European Union

3) Academic Year: 2021 - 2022

Co-PI in project funded under the Faculty Research Programme of Institute of Eminence, University of Delhi

4) Academic Year: 2022 - Till date

PI of an on-going project funded by College Research Council

Co-PI in an on-going project funded under the Faculty Research Programme of Institute of Eminence, University of Delhi

1) Book titled, 'Principles of Electromagnetic Theory', Narosa Publishing House, ISBN: 978-81-8487-600-0 

2) Book titled, 'Computing in Scilab', Cambridge University Press

3) E-lessons for Virtual Learning Environment, Institute of Life Long Learning, University of Delhi ISSN 2349-154X

• Magnetic Force
• Magnetic parameters in matter, magnetization, magnetic field, susceptibility, permeability
• B-H Curve , hysteresis
• Basic Theory of Ballistic Galvanometer
• Basic parameters associated with the Ballistic Galvanometer
• Conservation of energy, momentum and angular momentum of electromagnetic fields
• For ‘Quantum Mechanics and Nuclear Physics’ paper of B. Sc. (H) Physics II year (Paper no. XII)

4) Reviewer for Virtual Learning Environment, Institute of Life Long Learning, University of Delhi ISSN 2349-154X

• MCQ on Mechanics (B. Sc. (H) Physics I year, Old 3-year Course) 
• MCQ on Complex variables and Applications (B. Sc. (H) Physics II year, Old 3-year Course)

Articles in Refereed - SCOPUS Indexed Journals

1) Broadband mHz QPOs and spectral study of LMC X–4 with AstroSat

• Sharma, R., Jain, C. *,  Rikame, K. & Paul, B., 2023, MNRAS, 519, 2, 1764
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

2) Eclipse Timings of the LMXB XTE J1710-281 : discovery of a third orbital period glitch

• Jain, C. *, Sharma, R., & Paul, B., 2022, MNRAS, 517, 2, 2131
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

3) Broad-band spectral analysis of LMXB 2S 0921-63 with Suzaku

• Sharma, P., Jain, C. *, & Dutta, A., 2022, MNRAS, 517, 1, 825
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

4) Change in spin-down rate and detection of emission line in HMXB 4U 2206+54 with AstroSat observation

• Jain, C. *, Yadav, A., & Sharma, R., 2022, JAA, 43, 2, 101
• (Online ISSN: 0973-7758) (Impact Factor: 1.273)

5) Discovery of cyclotron and narrow Fe Kα lines in HMXB GRO J1750-27

• Sharma, P., Jain, C. *, & Dutta, A., 2022, MNRAS, 513, 1, L94
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

6) Timing and Spectral Analysis of HMXB OAO 1657-415 with NuSTAR

• Sharma, P., Sharma, R., Jain, C. *, & Dutta, A., 2022, MNRAS,  509, 4, 5747
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

7) Broad-band spectral study of LMXB black hole candidate 4U 1957+11 with NuSTAR

• Sharma, P., Sharma, R., Jain, C. *, Dewangan, G. C., & Dutta, A., 2021, RAA, 21, 9, 214
• (Online ISSN: 2397-6209) (Impact Factor: 1.512)

8) Broad-band spectral analysis of LMXB XTE J1710-281 with Suzaku

• Sharma, P., Sharma, R., Jain, C. *, & Dutta, A., 2020, MNRAS, 496, 1, 197
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

9) Study of the reflection spectra of SAX J1748.9-2021

• Sharma, R., Jain, C., & Dutta, A., 2019, MNRAS, 482, 2, 1634
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

10) Spectral properties of MXB 1658-298 in the low/hard and high/soft state

• Sharma, R., Jaleel, A., Jain, C., Pandey, J. C., Paul, B., & Dutta, A., 2018, MNRAS, 481, 4, 5560
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

11) Thermonuclear X-ray burst of MXB 1658-298 with NuSTAR

• Sharma, R., Jaleel, A., Jain, C., Paul, B., & Dutta, A., 2018, JAA, 39, 1, 16
• (Online ISSN: 0973-7758) (Impact Factor: 1.273)

12) Indication of a massive circumbinary planet orbiting the Low Mass X-ray Binary MXB 1658-298

• Jain, C. *, Paul, B., Sharma, R., Jaleel, A., & Dutta, A., 2017, MNRAS, 468, 1, L118
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

13) Torque reversals and pulse profile of the pulsar 4U 1626-67

• Beri, A., Jain, C., Paul, B., & Raichur, H., 2014, MNRAS, 439, 2, 1940
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

14) Pulse profile stability of the Crab pulsar

• Jain, C. * & Paul, B., 2011, RAA, 11, 10, 1134
• (Online ISSN: 2397-6209) (Impact Factor: 1.512)

15) Search for pulsations in the LMXB EXO 0748-676.

• Jain, C. * & Paul, B., 2011, RAA, 11, 5, 577
• (Online ISSN: 2397-6209) (Impact Factor: 1.512)

16) Eclipse Timings of the LMXB XTE J1710-281: Orbital Period Glitches.

• Jain, C. * & Paul, B., 2011, MNRAS, 413, 1, 2
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

17) New measurement of orbital and spin period evolution of the Accretion Disk Corona source 4U 1822-37.

• Jain, C. *, Paul, B., & Dutta, A., 2010, MNRAS, 409, 2, 755
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

18) An X-ray Bright Nucleus in the Low Surface Brightness Galaxy UGC 6614.

• Naik, S., Das, M., Jain, C. & Paul, B., 2010, MNRAS, 404, 4, 2056
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

19) Spectral and temporal changes associated with flux enhancement in 4U 1626-67.

• Jain, C. *, Paul, B., & Dutta, A., 2010, MNRAS, 403, 2, 920
• (Online ISSN: 1365-2966) (Impact Factor: 5.287)

20) Orbital X-ray modulation study of three supergiant HMXBs.

• Jain, C. *, Paul, B., & Dutta, A., 2009, RAA, 9, 12, 1303
• (Online ISSN: 2397-6209) (Impact Factor: 1.512)

21) Discovery of short orbital period in Supergiant Fast X-ray Transient IGR J16479-4514.

• Jain, C. *, Paul, B., & Dutta, A., 2009, MNRAS, 397, 1, L11
• (Online ISSN: 1745-3933) (Impact Factor: 5.287)

22) Orbital evolution measurement of the accreting millisecond X-ray pulsar SAX J1808.4-3658.

• Jain, C. *, Dutta, A., & Paul, B., 2007, JAA, 28, 4, 197
• (Online ISSN: 0973-7758) (Impact Factor: 1.273)

23) Pulse phase dependence of the magnetar bursts.

• Jain, C. *, Dutta, A., & Paul, B., 2007, JAA, 28, 4, 185
• (Online ISSN: 0973-7758) (Impact Factor: 1.273)

24) Search for orbital motion of the pulsar 4U 1626-67: Candidate for a neutron star with a supernova fallback accretion disk.

• Jain, C. *, Paul, B., Joshi, K., Dutta, A., & Raichur, H., 2007, JAA, 28, 4, 175
• (Online ISSN: 0973-7758) (Impact Factor: 1.273)

Articles in Conference Proceedings

1) Orbital evolution of the Low Mass X-ray Binaries 4U 1822-37, XTE J1710-281 and MXB 1658-298

Paul, B., & Jain, C. 2010, in The First Year of MAXI: Monitoring Variable X-ray Sources, 26

2) Orbital evolution of X-ray binaries and quasi-periodic oscillations in X-ray pulsars.

Paul B., Raichur H., Jain C., James M., Devasia J., & Naik S., 2011, ASI Conference Proceedings, 3, 29

Astronomer's Telegram

1) A torque reversal to spin-up in 4U 1626-67. Jain, C. & Paul, B., 2009, ATel 2095

2) Detection of periodic X-ray modulation of SFXT IGR J16207-5129 in the Swift-BAT light curve. Jain, C., Paul, B. & Maitra, C., 2011, ATel 3785

Articles in Peer Reviewed Journals

1) Stellar and Pulsar Classification using Machine Learning

• Talwar, J., Jain, P., Jain, C.*, Kaur, B., 2021, Hans Shodh Sudha, 1, 4, 71

1) Paper Presentation

• Paper at the ASTROSAT Workshop on "Study of Emission from Hot Diffuse Gas with ASTROSAT", held in December 2006
• Paper at 35th Astronomical Society of India, held in March 2017
• Paper at "National Conference on Recent Trends in the Study of Compact Objects: Theory and Observation (RETCO - III)" held in June 2017

2) Poster Presentation

• Poster at the Conference on "Wideband X-ray Astronomy: Frontiers in Timing and Spectroscopy", held in January, 2011
• Poster at the National Science Day celebration organized by Indian National Science Academy on 28th February 2018

OUTREACH ACTIVITY AS RESOURCE PERSON

• DBT sponsored workshop on ‘Applications of Lasers in Biotechnology’ held in Hansraj College from 16-12-2013 to 17-12-2013.
• DBT sponsored workshop on ‘Functional analysis and troubleshooting of Electronic Devices for Biotechnology and Biomedical applications’ held in Hansraj College from 12-03-2014 to 14-03-2014.
• Physics workshop on ‘Experiments – The Challenges and Opportunities’, organized by Kulachi Hansraj Model School, Delhi on 27-09-2014.
• DBT sponsored workshop on ‘Workshop on Integrating ICT in Teaching and Learning’ held in Hansraj College from 11-12-2015 to 18-12-2015.
• TGT Teachers Training at BBPS Training Centre, Bal Bharati Public School, Pitampura, Delhi on May 25, 2017.
• DU Pre-Entrance Summer School, for students from backward and economically weaker sections (EWS) organized by ILLL, University of Delhi from 07-06-2017 to 22-06-2017
• DU-Pre Entrance Summer School, for students from backward and economically weaker sections (EWS) organized by ILLL, University of Delhi from 01-06-2018 to 16-06-2018
• PEP Physics Workshop for PGT Teachers of Class XI and XII, Kulachi Hansraj Model School, Delhi on 07-07-2018
• Workshop on 'Development of Video Guide on the use of Upper primary Science Kit in Division of Educational Kits', NCERT, Delhi from 14-01-2019 to 18-01-2019.
• Workshop on 'Development of Video Guide on the use of Upper primary Science Kit in Division of Educational Kits', NCERT, Delhi from 11-02-2019 to 15-02-2019.
• Workshop on 'Revision of Specification of Kit items (Science and Mathematics)', NCERT, Delhi from 02-09-2019 to 06-09-2019.
• Workshop on 'Revision of Specification of Kit items (Science and Mathematics)', NCERT, Delhi from 16-09-2019 to 20-09-2019.
• Workshop on 'Development of Manuscript of Video Guide on the use of Secondary Science Kit', NCERT, Delhi from 17-02-2020 to 28-02-2020.
• National Webinar on 'Cosmological Ladder', organized by Rajapalayam Rajus' College on 23-06-2020
• Academic Councellor at IGNOU since September 2020
• Webinar on 'Frontiers in Astrophysics', organized by Bishop Heber College on 12-11-2020
• Webinar on 'A glimpse of X-ray data analysis', organized by Nehru Planetarium, Delhi in National Science Day 28th February 2021. 
• PEP Physics Workshop for PGT Teachers of Class XI and XII, Kulachi Hansraj Model School, Delhi on 20-08-2022

Participation in Workshop/ FDP/ STC/ Refresher Course (Academic Year 2018-2019 onwards)

• Short term course on 'Personality Development, Leadership and Ethics', organised by HRDC-CPDHE during 23-29 October 2018
• Faculty development program on 'Challenges before the Academia in the era of Gadgets, E-communication and Artificial Intelligence', organised by MHRFDC, Hansraj College, during 15-28 December 2018.
• Workshop on ‘Night Sky Photometer Fabrication’, organised by IUCAA, during 12–16 March 2019.
• Faculty development program on 'ICT in Education and Cyber-security', organised by MHRFDC, Hansraj College, during 10-16 July 2019.
• Refresher Course in 'Physical Science and Nano Science', organised by UGC-HRDC, JNU, during 18-30 November 2019.
• Science Academies Lecture Workshop (Online) during March 08 – 26, 2021
• Faculty Development Programme (Online) on 'Roadmap For Building New India With New Education Policy', organised by MHRFDC, Hansraj College, during 21-25 July 2021

Organization of various programmes at Hansraj College and University of Delhi

1) Workshop

• 'Applications of Lasers in Biotechnology' during 16th – 17th December 2013
• 'Functional analysis and troubleshooting of Electronic Devices for Biotechnology and Biomedical applications' during 12th – 14th March, 2014
• 'Fluorescence Studies of Organic Structures' during 26th – 27th September 2014
• 'Integrating ICT in Teaching and Learning' during 11th – 18th December 2015
• 'Embedded systems' during 15th – 16th January 2016
• 'Basic Blood and Biochemical Parameters of Human Health' on 07th September 2017
• 'Introduction to SciLab' during 22nd – 23rd September 2017
• 'Physics Unplugged' on 13th February 2021
• ‘Social Networking : The Gen Z Power Recruitment Tool’ on 27th – 28th February 2021, under the Mahatma Hansraj Faculty Development Centre of Hansraj College

2) Summer School

• Deputy Coordinator for the "DU Pre-Entrance Summer School" for students from backward and economically weaker sections (EWS) organized by ILLL, University of Delhi during 07th – 22nd June 2017

3) Faculty Development/Induction Programmes

• Faculty Development Program on 'Embedded systems and synthesis of nano-materials' during 06th – 07th January 2017
• Faculty Development Program on 'Digital Literacy: An Introduction to ICT Skills' during 15th – 17th September 2017
• One Week in 'Faculty Induction Program' during 17th June to 16th July 2019
• International Faculty Development Program on "Materials Characterization: Experimental and Theoretical Aspects" during 20th - 24th September 2021

4) Seminar

• ‘Chandershekhar: His quest for beauty and Truth in Astrophysics’, by Prof Patrick Das Gupta on 22nd February 2011
• ‘Application of semiconductors as sensor/sensing devices in medical sciences’ by Prof. Vinay Gupta on 12th February 2013
• ‘Renewable energy sources and importance of solar photo and voltaic’ by Dr P. K. Singh from National Physical Laboratory, Delhi on 05th September 2013
• ‘DNA biosensor for diagnosis of diseases’ by Dr Ashok Kumar of IGIB CSIR on 25th January 2014
• 'Physics of Stars' by Prof T. R. Seshadri on 01st April 2016
• 'Management Skills in Office Administration – Practices and Advances' on 22nd–23rd November 2016
• 'Radiation Hazards and Monitoring: Techniques and Materials' by Prof. P. D. Sahare on 10th April 2017

5) Webinar

• 'Observing the wonder world using fluorescence spectroscopy and microscopy' by Dr Sobhan Sen on 11th May 2020
• 'Challenges, Opportunities and the Way forward for Entrepreneurs & Startups in the Present Times' by Sh. Rajiv Chawla on 19th July 2020
• 'Women Entrepreneurship' by Ms. Richa Pandey Mishra on 23rd August 2020
• 'Aerial Robotics and Unmanned Systems' by Lt. Cdr. John Livingstone on 10th October 2020
• 'Research and Innovation at Undergraduate Level’ by Prof. Pankaj Tyagi on 25th February 2021

6) Online Competition on 'Covid-19: Awareness Program' during 13th – 18th May 2020

7) Online Course on ‘Introduction to Machine Learning for Physics and Electronics’ during 01st – 15th August 2020

8) Member of organizing committee of “National Conference on Advanced materials: Theory and Applications”, organized by Hansraj College, University of Delhi during 26-28 September 2019.

9) Educational visit: Students’ educational visit to National Physical Laboratory (NPL) on 27th September 2013