| Authors : | Sagar, Godambe, Chinmay Borwankar, Nijil Mankhuzhiyil, Bitan Ghosal, Anilkumar Tolamatti
behalf of MACE Team,
MACE Team Members :
Bhatt N., Bhattcharyya, S., Borwankar C., Chanchalani K., Chandra
P.,Chitnis V. R.,Chouhan N., Dar Z. A., Das M. P., Dhar V. K., Dorjey P.,
Dorji N., Ghosal B., Godambe S., Godiyal S., Hariharan J., Keshavanand,
Khurana M., Kotwal S. V., Koul M. K., Kushwaha C. P., Mankuzhyil N.,
Norlha S., Pandey P., Pathania A.,Sahayanathan S., Sarkar D., Sharma M.,
Singh K. K., Thubstan R., Tolamati, A., Venugopal K., Yadav K. K. |
| Abstract : | We report the detection of the radio galaxy NGC 1275 in very high energy (VHE, E > 80 GeV) gamma rays with the Major Atmospheric Cherenkov Experiment (MACE) telescope. Considering the relatively lower luminosity in gamma-rays, VHE gamma-rays detection from the radio galaxies is rare, hence there are only four radio galaxies detected so far in the history. Unlike blazars, radio galaxies have jets that are misaligned relative to the observer's line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole. Nevertheless, modeling the broad-band non-thermal emission from radio galaxies is challenging considering a low doppler factor, compared to other blazars. Hence detection of VHE gamma-rays provide a unique platform to study the broad-band emission process in radio galaxies. MACE Observations of NGC 1275 were performed between December 2022 and January 2023. This has led to the detection of two rare major flares. The brightest outburst, with ~1 times Crab Nebula flux above 80 GeV, was observed during the night of January 10. We will present the spectral features of these unique flares and its implications in the context of non-thermal emission models. |
