Large Area X-ray Proportional Counter
ASTROSAT

Department of Astronomy & Astrophysics, TIFR

Launched on September 28, 2015



click here for a detailed document for LAXPC Payload's first light observations.

The LAXPC instrument has advantage of better detection efficiency than PCA/RXTE above a 30 keV and fine timing capabilities. We observed large number of X-r ray sources during PV phase which ende ed on 31st March,2016. These X-r ray sources include pulsars, micro quasars, LMXBs, HMXBs, clusters, supernova remnants, AGNs etc. We have observed 4U 0115+63 a pulsar with cyclotron line in outburst. Figure 1 shows the light curve observed in three LAXPC detectors with PDS.

effective area plot

Figure 1: The light curve of 4U 0115-63 in outburst observed in three LAXPC detectors. Left panel show PDS spectrum.


Figure 2 shows PDS with QPOs in different energy bands observed in GRS 1915+105 in SPL X-ray state. These results shows that LAXPC instrument can explore higher energy bands with sufficient power.

DT10 spectra

Figure 2: PDS observed in LAXPC10 with QPOs in different energy bands observed in GRS 1915+105 in SPL X-ray state.

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