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12 papers · 2 filters
Probing the clumping structure of Giant Molecular Clouds through the spectrum, polarisation and morphology of X-ray Reflection Nebulae
Margherita Molaro, Rishi Khatri, Rashid Sunyaev
We suggest a method for probing global properties of clump populations in Giant Molecular Clouds (GMCs) in the case where these act as X-ray reflection nebulae (XRNe), based on the…
Inferring the composition of super-Jupiter mass companions of pulsars with radio line spectroscopy
Alak Ray, Abraham Loeb
We propose using radio line spectroscopy to detect molecular absorption lines (such as OH at 1.6-1.7 GHz) before and after the total eclipse of black widow (BW) and other short orb…
The study of multi-frequency scattering of ten radio pulsars
Wojciech Lewandowski, Karolina Rozko, Jaroslaw Kijak +2
We present the results of the multi-frequency scatter time measurements for ten radio pulsars that were relatively less studied in this regard. The observations were performed usin…
A test of the nature of the Fe K Line in the neutron star low-mass X-ray binary Serpens X-1
Chia-Ying Chiang, Edward M. Cackett, Jon M. Miller +12
Broad Fe K emission lines have been widely observed in the X-ray spectra of black hole systems, and in neutron star systems as well. The intrinsically narrow Fe K fluorescent line…
X-ray and radio emission from Type IIn supernova SN 2010jl
Poonam Chandra, Roger A. Chevalier, Nikolai Chugai +2
We present all X-ray and radio observations of the Type IIn supernova SN 2010jl. The X-ray observations cover a period up to day 1500 with Chandra, XMM-Newton, NuSTAR and Swift-XRT…
Multi-wavelength study of flaring activity in BL Lac object S5 0716+714 during 2015 outburst
Sunil Chandra, Haocheng Zhang, Pankaj Kushwaha +4
We present a detailed investigation of the flaring activity observed from a BL Lac object, S5 0716+714 , during its brightest ever optical state in the second half of January 2015.…
Simultaneous Observations of Giant Pulses from the Crab Pulsar, with the Murchison Widefield Array and Parkes Radio Telescope: Implications for the Giant Pulse Emission Mechanism
S. I. Oronsaye, S. M. Ord, N. D. R. Bhat +28
We report on observations of giant pulses from the Crab pulsar performed simultaneously with the Parkes radio telescope and the incoherent combination of the Murchison Widefield Ar…
On Detecting Millisecond Pulsars at the Galactic Center
Jean-Pierre Macquart, Nissim Kanekar
The lack of detected pulsars at the Galactic Center (GC) region is a long-standing mystery. We argue that the high stellar density in the central parsec around the GC is likely to…
Multi-frequency, Multi-Epoch Study of Mrk 501: Hints for a two-component nature of the emission
A. Shukla, V. R. Chitnis, B. B. Singh +8
Since the detection of very high energy (VHE) -rays from Mrk 501, its broad band emission of radiation was mostly and quite effectively modeled using one zone emission scenario.…
Discovery of Gamma-ray Pulsations from the Transitional Redback PSR J1227-4853
T. J. Johnson, P. S. Ray, J. Roy +9
The 1.69 ms spin period of PSR J1227-4853 was recently discovered in radio observations of the low-mass X-ray binary XSS J12270-4859 following the announcement of a possible transi…
Scatter broadening measurements of 124 pulsars at 327 MHz
M. A. Krishnakumar, Dipanjan Mitra, Arun Naidu +2
We present the measurements of scatter broadening time-scales () for 124 pulsars at 327 MHz, using the upgraded Ooty Radio Telescope (ORT). These pulsars lie in the dispers…
The LOFT perspective on neutron star thermonuclear bursts
J. J. M. in 't Zand, D. Altamirano, D. R. Ballantyne +31
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…