Publications (14)
Label-free microscopy of mitotic chromosomes using the polarization Orthogonality Breaking technique
R. Desapogu, G. Le Marchand, R. Smith +7
The vast majority of the microscopy methods currently available to study biological samples require staining prior to imaging. Nevertheless, the ability to reveal specific cell str…
Scaling and Fractal formation in Persistence
G. Manoj, P. Ray
The spatial distribution of unvisited/persistent sites in model is studied numerically. Over length scales smaller than a cut-off , the set…
Reply to comment on ``Dynamic scaling in the spatial distribution of persistent sites''
G. Manoj, P. Ray
We reply to the comment cond-mat/9902073 by Ben-Naim and Krapivsky on our paper cond-mat/9901130. We show that their arguments are incorrect, and present more numerical results to…
The missing GeV γ-ray binary: Searching for HESS J0632+057 with Fermi-LAT
G. A. Caliandro, A. B. Hill, D. F. Torres +13
The very high energy (VHE; >100 GeV) source HESS J0632+057 has been recently confirmed as a γ-ray binary, a subclass of the high mass X-ray binary (HMXB) population, through the d…
Gamma Rays and Gravitational Waves
E. Burns, S. Zhu, C. M. Hui +28
The first multimessenger observation of a neutron star merger was independently detected in gamma-rays by Fermi-GBM and INTEGRAL SPI-ACS and gravitational waves by Advanced LIGO an…
Exact Persistence Exponent for One-dimensional Potts Models with Parallel Dynamics
Gautam I. Menon, P. Ray
We obtain θ_p(q) = 2θ_s(q) for one-dimensional q-state ferromagnetic Potts models evolving under parallel dynamics at zero temperature from an initially disordered state, where ΅
Persistence in higher dimensions : a finite size scaling study
G. Manoj, P. Ray
We show that the persistence probability , in a coarsening system of linear size at a time , has the finite size scaling form …
X-ray Timing of Neutron Stars, Astrophysical Probes of Extreme Physics
Z. Arzoumanian, S. Bogdanov, J. Cordes +11
The characteristic physical timescales near stellar-mass compact objects are measured in milliseconds. These timescales -- the free-fall time, the fastest stable orbital period, an…
Spatial distribution of persistent sites
G. Manoj, P. Ray
We study the distribution of persistent sites (sites unvisited by particles ) in one dimensional reaction-diffusion model. We define the {\it empty intervals}…
Dynamic scaling in the spatial distribution of persistent sites
G. Manoj, P. Ray
The spatial distribution of persistent (unvisited) sites in one dimensional model is studied. The `empty interval distribution' , which is the probability…
Spectroscopy of Hg using Digital INGA at VECC, Kolkata
S. Das, S. Chatterjee, S. Samanta +13
Spectroscopic investigation of the Hg (Z=80, N=116) was carried out using the Indian National Gamma Array (INGA) setup at the Variable Energy Cyclotron Centre (VECC), Kolka…
Spatial scaling in fracture propagation in dilute systems
P. Ray, G. Date
The geometry of fracture patterns in a dilute elastic network is explored using molecular dynamics simulation. The network in two dimensions is subjected to a uniform strain which…
Persistence in One-dimensional Ising Models with Parallel Dynamics
G. I. Menon, P. Ray, P. Shukla
We study persistence in one-dimensional ferromagnetic and anti-ferromagnetic nearest-neighbor Ising models with parallel dynamics. The probability P(t) that a given spin has not fl…
X-Ray Observations of Black Widow Pulsars
P. Gentile, M. Roberts, M. McLaughlin +6
We describe the first X-ray observations of five short orbital period ( day), -ray emitting, binary millisecond pulsars. Four of these, PSRs J0023+0923, J11243653,…