GUESS WHO IS CRACKING BLACK HOLE CODE? INDIA’S VERY OWN ISRO!

[Kraitcorp]

Bangalore Mirror Bureau | Sep 2, 2016, 04.00 AM IST

The large area X-ray proportional counter (LAXPC) flight spare at TIFR, Mumbai. The latest observations ha ve been mad e by LAXPC instrument, on board the space mission, Astrosat

By: Mihika Basu

India's first dedicated satellite, Astrosat, which was launched by the Indian Space Research Organisation (ISRO), has, for the first time, observed "rapid variability of high-energy X-ray emission" from a black hole system. Further analysis of the data will provide "unprecedented insight" into the temporal behaviour of black hole systems, said the research team from multiple institutions in Bengaluru, Mumbai and Pune.


"After careful performance verification of the instruments on board Astrosat, Indian scientists are now using Astrosat to unravel the mysteries of the Universe and this finding is just the beginning of a large number of such discoveries that Astrosat is expected to make.


This marks a new era for Indian astronomy with Astrosat being a front-line dedicated astronomy satellite," said the researchers from the department of astronomy & astrophysics, Raman Research Institute, Bengaluru; Tata Institute of Fundamental Research (TIFR), Mumbai; and Inter-University Centre for Astronomy and Astrophysics, Pune, among others. The findings have been published in 'Astrophysical Journal'.


In black hole systems, mass from a regular star gets stripped off and falls towards the black hole forming a disk around the black hole. The temperature of the disk is more than ten million degrees and hence the system emits X-rays. The total power coming out of these systems is often more than ten thousand times that of the sun. Yet these systems vary rapidly in time-scales much less than a second.


Astronomers have always been puzzled by the enigmatic black hole system called GRS 1915+105.


It shows many different kinds of behaviours and its X-ray emission sometimes oscillates nearly on a time-scale of a few hundred milliseconds.


While these oscillations have been known and studied earlier in low-energy X-rays using the American satellite Rossi X-ray timing experiment, they have now been detected and characterised in high-energy X-rays by the large area X-ray proportional counter (LAXPC) instrument on board the space mission, AstroSat. The LAXPC instrument, which is the only instrument worldwide capable of such study, was designed and developed indigenously at TIFR.


NO OTHER OBSERVATORY CAPABLE OF ACHIEVING SUCH RESULTS


Astrosat, which was successfully launched on September 28, 2015, has five scientific instruments on board, including LAXPC. With a mass of 414 kg and an area of 8,000 cm square - three units of LAXPC - was fabricated by TIFR Prof JS Yadav. No payload of this area has been flown so far and hence it was a big challenge for the country when it was first mooted, said scientists. The instrument also measured the arrival time difference between the high- and low-energy X-rays, which is of the order of tens of milliseconds, providing direct clues to the geometry and dynamic behaviour of the gas swirling round a spinning black hole. "All this information was obtained by just nine orbits or a few hours of AstroSat observation of the source. No other observatory is capable of achieving these results," said the authors.

http://www.bangaloremirror.indiatim...Indias-very-own-ISRO/articleshow/53969282.cms

More info @: http://www.isro.gov.in/astrosat/large-area-x-ray-proportional-counters-laxpc

@PARIKRAMA
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[dev_moh]

lookout for India tv
"Kaale chedd ke jaadu ka pardafash kiya ISRO ne"


Ontopic-- this is just the beginning of a very very long Road.

 

[bickyis555]

Baby step. But long way to go.
Best of Luck ISRO.
You guys are pride of INDIA

 

[Ali Zadi]

NO OTHER OBSERVATORY CAPABLE OF ACHIEVING SUCH RESULTS

Thx for the Tag

About the thread Swift, Chandra and INTEGRAL

 

[dray]

NO OTHER OBSERVATORY CAPABLE OF ACHIEVING SUCH RESULTS


Astrosat, which was successfully launched on September 28, 2015, has five scientific instruments on board, including LAXPC. With a mass of 414 kg and an area of 8,000 cm square - three units of LAXPC - was fabricated by TIFR Prof JS Yadav. No payload of this area has been flown so far and hence it was a big challenge for the country when it was first mooted, said scientists. The instrument also measured the arrival time difference between the high- and low-energy X-rays, which is of the order of tens of milliseconds, providing direct clues to the geometry and dynamic behaviour of the gas swirling round a spinning black hole. "All this information was obtained by just nine orbits or a few hours of AstroSat observation of the source. No other observatory is capable of achieving these results," said the authors.

AWESOME!!!

 

[Kinetic]

Awesome but did not understand a bit! lol

 

[ashok321]

 

[Arsalan]

@GURU DUTT look at the quality of posts and then you start crying and blaming that some particular mods or members are AGAINST you and do not want you to be here!!

Please, look at what you are contributing! You yourself can be the best judge of that. Be honest with yourself at least!!

 

[anant_s]

First light from Large Area X-ray Proportional Counter (LAXPC) instrument on board ASTROSAT

9 December 2015

First light from LAXPC: Light curves from X-ray pulsar 4U0115-6

First light from LAXPC: A supernova remnant CAS-A with Iron line


Astrosat, India's first dedicated science space mission was launched on 28 September 2015. The Large Area X-ray Proportional Counter (LAXPC), designed and developed at TIFR, Mumbai, is one of the major payloads on ASTROSAT. The LAXPC instrument became fully operational on 19 October 2015 for the first time in space. LAXPC will provide the largest effective area among all satellite missions flown so far, worldwide, and will remain so for the next 10 years, for X-ray studies in the 3-80 keV energy range.

“First light from LAXPC has allowed us to observe Black hole X-ray binaries, Microquasars, X-ray pulsars, Active Galactic Nuclei (AGN)s and Supernova remnants, providing us with very high quality data,” says Prof. JS Yadav, lead scientist of the LAXPC team.

The LAXPC instrument is functioning perfectly and has achieved all detector parameters/goals as proposed initially. TIFR Director, Prof. Sandip Trivedi says “All the TIFR payloads on board Astrosat are working just as we would have liked them to. This is very good news for us”.

J.S.Yadav and Sandip Trivedi with members of the press, discussing exciting developments of the first light from the LAXPC instrument on board Astrosat

NASA’s RXTE/PCA has been the most successful X-ray mission in the recent past. However, now, the LAXPC instrument is more efficient than the RXTE/PCA, above 20 keV, showing better spectral and timing characteristics. As Prof. Yadav says, “We have measured a supernova remnant using the LAXPC and the data we have obtained is of a quality higher than that obtained by RXTE/PCA”.

The LAXPC detectors have the largest collecting area among any X-ray instrument ever built in the world, and have been designed and developed at TIFR, Mumbai. A cluster of three co-aligned identical detectors provides a large area of collection of about 8000 cm2. The large detection volume (15 cm depth) filled with xenon gas at ~ 2 atmospheres, results in a detection efficiency greater than 50%, above 30 keV.

It is a large payload with a total of eight flight packages (414 kg out of 730 kg of all five science payloads). Designing and fabricating this payload was highly challenging and took a decade to come to fruition, passing through the leadership of several accomplished scientists at TIFR. Prof. P. C. Agrawal initiated the design and development of the LAXPC payload in 2002. Prof. R. K. Manchanda took over in 2011. When he retired in November, 2012, Prof. J. S. Yadav took over the development of the LAXPC payload. In addition to the central LAXPC team, Prof. H. M. Antia played a leading role in developing the GEANT4 simulation for the LAXPC detectors in record time. ISRO has also been instrumental in making this project a success, as “they have provided extensive support during the fabrication and testing of the LAXPC payload”, says Prof. Yadav.

The LAXPC instrument is best suited to explore extreme conditions such as strong gravity regions, extremely powerful accelerators in the universe and regions of the highest densities & magnetic fields. The primary objectives are to study binary star systems containing neutron stars and black holes, accretion flow, accretion disk- radio jet connection, estimation of the magnetic fields of neutron stars, and to study Active Galactic Nuclei (AGNs) and blazer systems beyond our galaxy.

“Black holes are extremely mysterious objects of which we know very little, which is why it is important to observe many such black hole events to really understand what is going on and to be confident about our interpretation of data. We now have the capability to see many more blackholes than we did in the past”, says Prof Trivedi at a recently held press conference at TIFR, Mumbai.

TIFR now has the unique capability of performing ground based observations through the Giant Metrewave Radio Telescope (GMRT) and space based observations through Astrosat, of the same sources. “Additionally, we can now combine LAXPC’s observations with those of the other instruments on board, thereby getting coverage across many channels and a wider window into the universe”, says Prof Trivedi.

Astrosat is a big step for the Indian astronomy community and the LAXPC instrument is expected to play a leading role in many exciting discoveries. Out of a planned mission span of 5 years which is likely to be extended to 10 years, the first 6 months are dedicated to calibration and fine tuning of the instruments including performance verification. ASTROSAT will be open to national and international astronomers in about a year’s time, when the 6 month guaranteed time phase (for instrument teams) is completed.

From 1 Dec 2015 all instruments on board Astrosat have been switched on and will be running 24 hours a day.

http://www.tifr.res.in/~TSN/LAXPC%20First%20Light_2015%20Dec.html

 

[zebra7]

View attachment 331061


First light from Large Area X-ray Proportional Counter (LAXPC) instrument on board ASTROSAT

9 December 2015

First light from LAXPC: Light curves from X-ray pulsar 4U0115-6

First light from LAXPC: A supernova remnant CAS-A with Iron line


Astrosat, India's first dedicated science space mission was launched on 28 September 2015. The Large Area X-ray Proportional Counter (LAXPC), designed and developed at TIFR, Mumbai, is one of the major payloads on ASTROSAT. The LAXPC instrument became fully operational on 19 October 2015 for the first time in space. LAXPC will provide the largest effective area among all satellite missions flown so far, worldwide, and will remain so for the next 10 years, for X-ray studies in the 3-80 keV energy range.

“First light from LAXPC has allowed us to observe Black hole X-ray binaries, Microquasars, X-ray pulsars, Active Galactic Nuclei (AGN)s and Supernova remnants, providing us with very high quality data,” says Prof. JS Yadav, lead scientist of the LAXPC team.

The LAXPC instrument is functioning perfectly and has achieved all detector parameters/goals as proposed initially. TIFR Director, Prof. Sandip Trivedi says “All the TIFR payloads on board Astrosat are working just as we would have liked them to. This is very good news for us”.

J.S.Yadav and Sandip Trivedi with members of the press, discussing exciting developments of the first light from the LAXPC instrument on board Astrosat

NASA’s RXTE/PCA has been the most successful X-ray mission in the recent past. However, now, the LAXPC instrument is more efficient than the RXTE/PCA, above 20 keV, showing better spectral and timing characteristics. As Prof. Yadav says, “We have measured a supernova remnant using the LAXPC and the data we have obtained is of a quality higher than that obtained by RXTE/PCA”.

The LAXPC detectors have the largest collecting area among any X-ray instrument ever built in the world, and have been designed and developed at TIFR, Mumbai. A cluster of three co-aligned identical detectors provides a large area of collection of about 8000 cm2. The large detection volume (15 cm depth) filled with xenon gas at ~ 2 atmospheres, results in a detection efficiency greater than 50%, above 30 keV.

It is a large payload with a total of eight flight packages (414 kg out of 730 kg of all five science payloads). Designing and fabricating this payload was highly challenging and took a decade to come to fruition, passing through the leadership of several accomplished scientists at TIFR. Prof. P. C. Agrawal initiated the design and development of the LAXPC payload in 2002. Prof. R. K. Manchanda took over in 2011. When he retired in November, 2012, Prof. J. S. Yadav took over the development of the LAXPC payload. In addition to the central LAXPC team, Prof. H. M. Antia played a leading role in developing the GEANT4 simulation for the LAXPC detectors in record time. ISRO has also been instrumental in making this project a success, as “they have provided extensive support during the fabrication and testing of the LAXPC payload”, says Prof. Yadav.

The LAXPC instrument is best suited to explore extreme conditions such as strong gravity regions, extremely powerful accelerators in the universe and regions of the highest densities & magnetic fields. The primary objectives are to study binary star systems containing neutron stars and black holes, accretion flow, accretion disk- radio jet connection, estimation of the magnetic fields of neutron stars, and to study Active Galactic Nuclei (AGNs) and blazer systems beyond our galaxy.

“Black holes are extremely mysterious objects of which we know very little, which is why it is important to observe many such black hole events to really understand what is going on and to be confident about our interpretation of data. We now have the capability to see many more blackholes than we did in the past”, says Prof Trivedi at a recently held press conference at TIFR, Mumbai.

TIFR now has the unique capability of performing ground based observations through the Giant Metrewave Radio Telescope (GMRT) and space based observations through Astrosat, of the same sources. “Additionally, we can now combine LAXPC’s observations with those of the other instruments on board, thereby getting coverage across many channels and a wider window into the universe”, says Prof Trivedi.

Astrosat is a big step for the Indian astronomy community and the LAXPC instrument is expected to play a leading role in many exciting discoveries. Out of a planned mission span of 5 years which is likely to be extended to 10 years, the first 6 months are dedicated to calibration and fine tuning of the instruments including performance verification. ASTROSAT will be open to national and international astronomers in about a year’s time, when the 6 month guaranteed time phase (for instrument teams) is completed.

From 1 Dec 2015 all instruments on board Astrosat have been switched on and will be running 24 hours a day.

http://www.tifr.res.in/~TSN/LAXPC%20First%20Light_2015%20Dec.html

View attachment 331063

Awesome, But Mammu Bole to Appun ke Palle Kuch Nahi Padda !!