76 citations · 83 across the 5 of their papers we have counts for
7 papers · 1 filter
Quasi-Simultaneous Two Band Optical Micro-Variability of Luminous Radio-Quiet QSOs
Alok C. Gupta, Weimin Yuan
We report the first results of quasi-simultaneous two passband optical monitoring of six quasi-stellar objects to search for micro-variability. We carried out photometric monitorin…
Comments on the ERA-2005 numerical theory of Earth rotation
P. M. Mathews, N. Capitaine, V. Dehant
Two papers recently published in Celestial Mechanics (Krasinsky 2006, and Krasinsky and Vasilyev 2006) have presented a model for Earth-rotation variations, called ERA-2005, based…
Intra-night Optical Variability of Luminous Radio Quiet QSOs
A. C. Gupta, U. C. Joshi
In the present paper we report the detection of intra-night variability in some of the RQQSOs and one LDQ. To study intra-night variability, we carried out photometric monitoring o…
The simultaneous VLA observations of Sgr A* from 90 to 0.7 cm
T. An, J. -H. Zhao, X. -Y. Hong +4
We present a spectrum of Sgr A* observed simultaneously on June 17, 2003 at wavelengths from 90 to 0.7 cm with the VLA. In the spectrum, we also include the measurements of Sgr A*…
A study of the old galactic star cluster Berkeley 32
Tom Richtler, Ram Sagar
We present new CCD photometry of the distant old open star cluster Berkeley 32 in Johnson V and Cousins I passbands. A total of about 3200 stars have been observed in a field of 13…
Sheared helical turbulence and the helicity constraint in large-scale dynamos
A. Bigazzi, A. Brandenburg, K. Subramanian
The effect of shear on the growth of large scale magnetic fields in helical turbulence is investigated. The resulting large-scale magnetic field is also helical and continues to ev…