# Observations of the Crab Nebula, Mkn 501 and Mkn 421 using the TACTIC Imaging Element

Source: [Observations of the Crab Nebula, Mkn 501 and Mkn 421 using the TACTIC Imaging Element](<https://www.sota2.com/research/paper/68fa1e2b7a2b558e29320486>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-23T14:07:29.836Z

Authors: N. Bhatt, N.K. Agarwal, C.K. Bhat, S. Bhattacharyya, V.K. Dhar, A. Goyal, H.C. Goyal, C.L. Kaul, D.K. Koul, I.K. Kaul, R.K. Kaul, S.K. Kaul, S.R. Kaul, M.K. Koul, R. Koul, M. Kothari, R.C. Rannot, A.K. Razdan, S. Sahayanathan, M.L. Sapru, N. Satyabhama, A.K. Tickoo, N. Venugopal, K.K. Yadav, C.L. Bhat

Published: 1999-06-08T08:33:02.000Z

## Abstract

The results of our observational campaigns on the two extragalactic sources Mkn 501 and Mkn 421, carried out with the Imaging Element of the TACTIC array, during March-May, 1998 and April-May, 1999, are presented. The results indicate that the two BL Lac objects (Mkn 501 and Mkn 421) were in a \`low' gamma-ray emission state during both epochs of our observations.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/astro-ph/9906128>)

[PDF](<https://arxiv.org/pdf/astro-ph/9906128.pdf>)