512 citations · 2.2k across the 42 of their papers we have counts for
5 papers · 1 filter
On the photometric error calibration for the `differential light curves' of point-like Active Galactic Nuclei
Arti Goyal, Mukul Mhaskey, Gopal-Krishna +3
It is important to quantify the underestimation of rms photometric errors returned by the commonly used algorithm in the software, in the context of dif…
Rapid optical variability of TeV blazars
Gopal-Krishna, Arti Goyal, S. Joshi +5
In this first systematic attempt to characterise the intranight optical variability (INOV) of TeV detected blazars, we have monitored a well defined set of 9 TeV blazars on total 2…
Understanding BL Lac objects Structural & kinematic mode changes in the BL Lac object PKS 0735+178
S. Britzen, A. Witzel, B. P. Gong +6
Context. We present evidence that parsec-scale jets in BL Lac objects may be significantly distinct in kinematics from their counterparts in quasars. We argued this previously for…
Optical variability of radio-intermediate quasars
Arti Goyal, Gopal-Krishna, S. Joshi +4
We report the results of our intensive intranight optical monitoring of 8 `radio-intermediate quasars' (RIQs) having flat or inverted radio spectra. The monitoring was carried out…
Unusual optical quiescence of the classical BL Lac object PKS 0735+178 on intranight time scale
Arti Goyal, Gopal-Krishna, G. C. Anupama +6
We present the result of our extensive intranight optical monitoring of the well known low-energy peaked BL Lac (LBL) object PKS 0735+178. This long-term follow-up consists of -…