Browsing by Author "Rathna Kumar, S"

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Determination of H0 through monitoring of gravitationally lensed quasars

Rathna Kumar, S (Indian Institute of Astrophysics, 2014-04)

Cosmology is the study of the universe as a whole, in particular its physical origin and evolution. According to the current understanding, the universe came into existence some 13.7 billion years ago in a Big Bang (a ...
H0 from ten well-measured time delay lenses

Rathna Kumar, S; Stalin, C. S; Prabhu, T. P (EDP Sciences, 2015-08)

In this work, we present a homogeneous curve-shifting analysis using the difference-smoothing technique of the publicly available light curves of 24 gravitationally lensed quasars, for which time delays have been reported ...
Strong lens time delay challenge. II. results of TDC1

Liao, K; Treu, T; Marshall, P; Fassnacht, C. D; Rumbaugh, N; Dobler, G; Aghamousa, A; Bonvin, V; Courbin, F; Hojjati, A; Jackson, N; Kashyap, V; Rathna Kumar, S; Linder, Eric; Mandel, Kaisey; Meng, Xiao-Li; Meylan, G; Moustakas, L. A; Prabhu, T. P; Romero-Wolf, A; Shafieloo, A; Siemiginowska, A; Stalin, C. S; Tak, H; Tewes, M; van Dyk, D (IOP Publishing, 2015-02-20)

We present the results of the first strong lens time delay challenge. The motivation, experimental design, and entry level challenge are described in a companion paper. This paper presents the main challenge, TDC1, which ...

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