I am from the Kushinagar district of Uttar Pradesh. It is located about 50 kilometres east of Gorakhpur, Uttar Pradesh. Kushinagar is an important and popular Buddhist pilgrimage site where Buddhists believe Gautama Buddha attained parinirvana. I did my schooling and B.Sc. in my home town and then moved to Gorakhpur to do my M.Sc. and Ph.D. I did my Ph.D. under the joint supervision of Prof. U. S. Pandey (retired professor, department of physics, DDU Gorakhpur University) and Prof. Ram Sagar (the founding director of ARIES, Nainital). I submitted my Ph.D. thesis in 1998 and was awarded the degree in 1999. During July 1999 to April 2006, I worked as a postdoctoral or visiting fellow at the following institutes: Physical Research Laboratory (PRL), Ahamedabad; Landessternwarte, Heidelberg, Germany; Harish-Chandra Research Institute (HRI), Allahabad; and Department of High Energy Physics (DHEP), Tata Institute of Fundamental Research (TIFR), Mumbai. During May 2006 to December 2007, I worked as a visiting faculty member at the Yunnan National Astronomical Observatory (YNAO), Kunming, China, and the Centre for Astrophysics, Guangzhou University, China. I joined ARIES as a faculty member on January 7, 2008. To date, five students (Dr. Haritma Gaur, Dr. Jai Bhagwan, Dr. Aditi Agarwal, Dr. Nibedita Kalita, and Dr. Ashwani Pandey) have been awarded their PhD degrees under my supervision. Recently, Mr. Vinit Dhiman submitted his PhD dissertation under my supervision.

This is the age of multi-wavelenth (MW) time domain astronomy in which the transient astronomical sources are of great interest due to their rapid change in flux and polarization. Simultaneous MW observation of a particular transient source on an extended period of time has importance to understand the emission mechanism in different electromagnetic (EM) bands. Blazars are among one of the most favourite astronomical transient objects, because they emit radiation in the complete EM spectrum, and their flux and polarization are highly variable. I mainly work on simultaneous MW and also single EM band studies of blazars. The work involve MW observations, data analysis and theoretical modeling.

1. R. Bachev, T. Tripathi, A. C. Gupta, et al.; Intra-night optical flux and polarization variability of BL Lacertae during its 2020 – 2021 high state; MNRAS, 522, 3018-3035 (2023).
2. M. D. Jovanovic, G. Damljanovic, F. Taris, A. C. Gupta, G. Bhatta; Optical Flux Variability of Twelve Blazars from 2013 to 2019; MNRAS, 522, 767-791 (2023).
3. A. Roy, A. C. Gupta, et al; Multi-band optical variability of the blazar AO 0235+164; ApJS, 265, 14(19pp) (2023).
4. V. Dhiman, A. C. Gupta, et al; Multi-band Optical Variability of the TeV Blazar PG 1553+113 in 2019; MNRAS, 519, 2796-2811 (2023).<br>
5. S. Kishore, A. C. Gupta & P. J. Wiita; Detection of quasi-periodicity with multi-harmonics in the blazar S4 0954+658; ApJ, 943, 53 (16pp) (2023).
6. P. U. Devanand, A. C. Gupta, V. Jithesh & P. J. Wiita; X-ray Intraday Variability of HBL Blazars with XMM-Newton; ApJ, 939, 80 (28pp) (2022).
7. S. G. Jorstad et al. (including A. C. Gupta); Rapid Quasi-Periodic Oscillations in the Relativistic Jet of the Blazar BL Lacertae; Nature, 609, 265–268 (2022).
8. A. P. Noel, H. Gaur, A. C. Gupta, et al.; X-ray Intra-day variability of the TeV blazar Mrk 421 with XMM-Newton; ApJS, 262, 4 (15pp) (2022).
9. A. Roy, V. R. Chitnis, A. C. Gupta, et al.; Detection of a quasi-periodic oscillation in the optical light curve of the remarkable blazar AO 0235+164; MNRAS, 513, 5238-5244 (2022).
10. A. C. Gupta, et al.; Long Term Multi-band Near Infra-Red Variability of Binary Supermassive Black Hole Blazar OJ 287 during 2007 - 2021, ApJS, 260, 39 (12pp) (2022).

List of Publications link:

https://ui.adsabs.harvard.edu/search/q=%3Dauthor%3A(%22Gupta%2C%20Alok%20C.%22%20OR%20%22Gupta%2C%20A.%20C.%22%20OR%20%22Gupta%2C%20Alok%20G.%22%20OR%20%22Gupta%2C%20Alok%20Chandra%22)%20AND%20pubdate%3A%5B1998-01%20TO%20*%5D&sort=date%20desc%2C%20bibcode%20desc&p_=0

Google Scholar link:

https://scholar.google.co.in/citations?user=enSKqdYAAAAJ&hl=en&oi=ao

 

 

Last Updated on : Jul 4, 2024 - 11:26 am