Zobrazeno 1 - 10
of 330
pro vyhledávání: '"Chand, H."'
Autor:
Ding, X., Treu, T., Birrer, S., Chen, G. C. -F., Coles, J., Denzel, P., Galan, M. Frigo A., Marshall, P. J., Millon, M., More, A., Shajib, A. J., Sluse, D., Tak, H., Xu, D., Auger, M. W., Bonvin, V., Chand, H., Courbin, F., Despali, G., Fassnacht, C. D., Gilman, D., Hilbert, S., Kumar, S. R., Lin, Y. -Y., Park, J. W., Saha, P., Vegetti, S., Van de Vyvere, L., Williams, L. L. R.
Publikováno v:
MNRAS, (2021), 503, 1096
In recent years, breakthroughs in methods and data have enabled gravitational time delays to emerge as a very powerful tool to measure the Hubble constant $H_0$. However, published state-of-the-art analyses require of order 1 year of expert investiga
Externí odkaz:
http://arxiv.org/abs/2006.08619
Publikováno v:
In Materials Today: Proceedings 2023 78 Part 3:695-699
A small subset of optically selected radio-quiet quasars showing weak or no emission lines may turn out to be the elusive radio-quiet BL Lac objects, or simply be radio-quiet QSOs with a still-forming/shielded broad line region (BLR). High polarisati
Externí odkaz:
http://arxiv.org/abs/1807.00630
Autor:
Baug, T., Ojha, D. K., Ghosh, S. K., Sharma, S., Pandey, A. K., Kumar, Brijesh, Ghosh, Arpan, Ninan, J. P., Naik, M. B., D'Costa, S. L. A., Poojary, S. S., Sandimani, P. R., Shah, H., Reddy, B. Krishna, Pandey, S. B., Chand, H.
TIFR Near Infrared Imaging Camera-II is a closed-cycle Helium cryo-cooled imaging camera equipped with a Raytheon 512 x 512 pixels InSb Aladdin III Quadrant focal plane array having sensitivity to photons in the 1-5 microns wavelength band. In this p
Externí odkaz:
http://arxiv.org/abs/1802.05008
Autor:
McHardy, I M, Connolly, S D, Cackett, K Horne E M, Gelbord, J, Peterson, B M, Pahari, M, Gehrels, N, Edelson, R, Goad, M, Lira, P, Arevalo, P, Baldi, R D, Brandt, N, Breedt, E, Chand, H, Dewangan, G, Done, C, Elvis, M, Emmanoulopoulos, D, Fausnaugh, M M, Kaspi, S, Kochanek, C S, Korista, K, Papadakis, I E, Rao, A R, Uttley, P, Vestergaard, M, Ward, M J
We report the results of intensive X-ray, UV and optical monitoring of the Seyfert 1 galaxy NGC 4593 with Swift. There is no intrinsic flux-related spectral change in the the variable components in any band with small apparent variations due only to
Externí odkaz:
http://arxiv.org/abs/1712.04852
It is widely believed that the cool gas clouds traced by MgII absorption, within a velocity offset of 5000 km/s relative to the background quasar are mostly associated with the quasar itself, whereas the absorbers seen at larger velocity offsets towa
Externí odkaz:
http://arxiv.org/abs/1710.04020
For a new sample of 8 weak-line-quasars (WLQs) we report a sensitive search in 20 intranight monitoring sessions, for blazar-like optical flux variations on hour-like and longer time scale (day/month/year$-$like). The sample consists exclusively of t
Externí odkaz:
http://arxiv.org/abs/1706.04438
Autor:
Arun Kumar, K., Varun Chand, H., John, Neethu Maria, Emmanuel, Sruthy, Polamarasetty, Sarojarani, Sabharwal, Seema
Publikováno v:
AIP Conference Proceedings; 2024, Vol. 3149 Issue 1, p1-7, 7p
Autor:
Chand, H. Varun, Jamali@Jamalai, Mazura, Mathew, Preeti Mariam, Kumar, S. Arun, Devassy, Deepa, Anoop, S.
Publikováno v:
AIP Conference Proceedings; 2024, Vol. 3122 Issue 1, p1-7, 7p
Autor:
Ivanchik, A., Petitjean, P., Varshalovich, D., Aracil, B., Srianand, R., Chand, H., Ledoux, C., Boisse, P.
Publikováno v:
Astron.Astrophys.440:45-52,2005
A new limit on the possible cosmological variation of the proton-to-electron mass ratio \mu=m_p/m_e is estimated by measuring wavelengths of H_2 lines of Lyman and Werner bands from two absorption systems at z_abs = 2.5947 and 3.0249 in the spectra o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0507174