Abstract Details
| Name: aru beri Affiliation: IIT Ropar Conference ID: ASI2015_553 Title : Temperature Measurement of Thermonuclear X-ray bursts using Broadband X-ray Observations with Beppo-SAX Authors and Co-Authors : Biswajit Paul; Mauro Orlandini; Chandreyee Maitra; Raman Research Institute,Bangalore, India; INAF-IASF Bologna,Italy; AIM Saclay, France Abstract Type : Poster Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We will present measurement of temperature of thermonuclear X-ray bursts using broadband X-ray light curves from the Beppo-SAX observatory. Light curves obtained with the MECS and PDS instruments in a broad energy band of 1.8-30 keV have been used for measurement of the temperature evolution during these bursts . We have used the data from a total of twelve observations of six sources during which 22 bursts were detected. However, instead of carrying out time resolved spectroscopy, we have determined the temperature in small time intervals using the ratio of count rates in two instruments assuming blackbody nature of burst emission and appropriate interstellar absorption for the respective sources . We have obtained temperatures as high as ~ 3.0 keV during some of the bursts, even when there is no evidence of photospheric radius expansion. Moreover, these high temperatures were observed in the sources during different spectral states. We will discuss the implications of relatively high burst temperatures obtained with the Beppo-SAX broadband data. |