396 citations · 2.8k across the 69 of their papers we have counts for
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Spectral Lags and the Lag-Luminosity Relation: An Investigation with Swift BAT Gamma-ray Bursts
T. N. Ukwatta, M. Stamatikos, K. S. Dhuga +7
Spectral lag, the time difference between the arrival of high-energy and low-energy photons, is a common feature in Gamma-ray Bursts (GRBs). Norris et al. 2000 reported a correlati…
Variability in the Prompt Emission of Swift-BAT Gamma-Ray Bursts
T. N. Ukwatta, K. S. Dhuga, W. C. Parke +8
We present the results of our study of the variability time scales of a sample of 27 long Swift Gamma-Ray Bursts (GRBs) with known redshifts. The variability time scale can help ou…
The Correlation of Spectral Lag Evolution with Prompt Optical Emission in GRB 080319B
Michael Stamatikos, Tilan N. Ukwatta, Takanori Sakamoto +8
We report on observations of correlated behavior between the prompt gamma-ray and optical emission from GRB 080319B, which confirm that (i) they occurred within the same astrophysi…
Investigating the Possibility of Screening High-z GRBs based on BAT Prompt Emission Properties
T. N. Ukwatta, T. Sakamoto, K. S. Dhuga +5
Being able to quickly select among gamma-ray bursts (GRBs) seen by the Swift satellite those which are high-z candidates would give ground-based observers a better chance to determ…
Spectral Lags of Gamma-Ray Bursts from Primordial Black Hole (PBH) Evaporations
T. N. Ukwatta, J. H. MacGibbon, W. C. Parke +5
Primordial Black Holes (PBHs), which may have been created in the early Universe, are predicted to be detectable by their Hawking radiation. PBHs with an initial mass of 5.0 * 10^1…