| Authors : | A. Tolamatti1,2, K. K. Singh1,2, B. Ghosal1,2, K. K. Yadav1,2, N. Bhatt1, S. Bhattcharyya1,2, C. Borwankar1, K. Chanchalani1, P. Chandra1, V. R. Chitnis3, N. Chouhan1, Z. A. Dar1, M. P. Das1, V. K. Dhar1, P. Dorjey3, N. Dorji3 , S. Godambe1, S. Godiyal1, J. Hariharan1, Keshavananda1, M. Khurana1,2, S. V. Kotwal1, M. K. Koul1, C. P. Kushwaha1, N. Mankuzhyil1, S. Norlha1,A. Pathania1, P. Pandey1, S. Sahayanathan1,2, D. Sarkar1,2, M. Sharma1, R. Thubstan1, K. Venugopal1 |
| Authors Affiliation: | 1 Astrophsyical Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
2 Homi Bhabha National Institute, Mumbai 400094, India
3 Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai 400005, India. |
| Abstract : | High redshift blazars are the most powerful persistent astrophysical sources ever to be detected in gamma ray energy band. Their study can shed light on formation and growth of supermassive blackholes at the early universe and also their connection with powerful relativistic jets. In January 2023, the astronomical community bore witness to an extraordinary event as a high redshift blazar named TON 0599 (z = 0.725) burst into a bright flaring episode, emitting radiation across a broad band spectrum, from radio waves to high energy gamma rays. Notably, the daily averaged gamma ray flux measured by the Fermi- large area telescope reached approximately 22 times the longterm average during this remarkable event. During the same epoch, the MACE gamma-ray telescope has collected the near simultaneous data from the source for about 44 hours in Jan-Feb 2023. We report the comprehensive analysis of MACE data shedding light on very high energy emission during this event. We also discuss the implications of MACE results in the context multi-wavelength emission. |
