Post on 08-Jan-2016
description
High Energy Astrophysics in India :
ASTROSAT and Future
X-ray Astronomy in India
PAST
PRESENT
FUTURE
IXAE
ROCKET
BALLOON
Black hole studies
with IXAE
Rapid X-ray variabilityand
quasi periodic oscillations
Possible evidence ofblack event horizon
Superluminal motion in the
Galactic microquasar GRS 1915+105
Rapid changes in the
state of the black hole accretion disk
Association betweenradio flare
andX-ray activity
Pulsar studies with the
Indian X-ray Astronomy
Experiment (IXAE)
Energy dependenceof the Crab pulsar profile
Profile change intransient X-ray pulsarchange in accretion mode!!
Quasi periodic oscillations in X-rayPulsar, a rare phenomenon
Pulse periodand
profileevolution
in transient
X-rayPulsars
ASTROSAT (2005/2006) Indian Multi-wavelength
Astronomy Satellite
Ultraviolet Imaging TelescopeSoft X-ray TelescopeX-ray Sky MonitorCadmium Zinc Telluride ArrayArray of Large Area X-ray
Proportional Counters
Broad band X-ray spectroscopyBlack holes, Pulsars, AGNs etcIsolating thermal and nonthermal
components, cyclotron lines etc.X-ray TimingPulsars, Black holes, AGNs etc.Periodic, quasiperiodic and aperiodic variabilities
LAXPC
LAXPC: Large-Area Xenon Proportional Counter
High Energy Imager
:
CZTI: Cd-Zn-Te Imager
Soft X-ray Telescope
Scanning Sky Monitor
SSM:Sky Survey Monitor
Very Large Area (6,000 –7,500 cm2) High Detection Efficiency High Time Resolution Good Energy Resolution X-ray Polarisation
LAXPC Sensitivity
Cyclotron Absorptionin Neutron Star
Galactic Point Sources
Accreting Millisecond Pulsar(s) Transient Sources
Nonthermal Emission inClusters of GalaxiesMagnetic Field and Energy Density
Black Hole Studies with Black Hole Studies with the ASTROSATthe ASTROSAT
Galactic Point Sources
Active Galactic Nuclei
Galactic BHCs
Persistent SourcesBlack Hole Candidates (broad band spectroscopy)
Transient Sources
Aperiodic variabilities, high and low freq QPOs
Galactic Point Sources
Relation between spectral and temporal variations
The Elephand and the Ant
B
Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs)
Continuum Spectra (quasi) Periodic and Aperiodic
Variabilities Emission Line Variabilities
Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs)
Broad band continuum spectraOrder of magnitude improvement in sensitivity at hard X-rays with ASTROSAT
Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs)
(quasi) Periodic Variabilities
Active Galactic Nuclei(Seyfert galaxies, Quasars, BL LACs)
and Aperiodic Variabilities