A dataset provided by the European Space Agency

Name 076486
Title Pulse Phase Resolved Spectroscopy of 4U 1626-67 during the spin-up era
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0764860101

DOI 10.5270/esa-fyr2xuw
Author Prof Biswajit Paul
Description We propose 50ks observation of an accretion powered pulsar 4U 1626-67. The primary purpose is to study the variability of the emission lines as a function of pulse phase during the current spin-up era. Our pulse phase resolved spectroscopy of previous XMM-Newton observation during spin-down era revealed pulse phase dependence of the O-VII line at 0.568 keV by factor of ~4. We interpret that these variations are due to warps in the inner accretion disc induced by radiation pressure which is also believed to be the cause for spin-down. It is expected to show different line variability pattern during the spin-up phase which we aim to study. We will also do time resolved spectroscopy to study the behaviour of these low energy emission lines during the flares
Publication Changes in the pulse phase dependence of X-ray emission lines in 4U 1626-67 with a torque reversal . Beri, Aru, Paul, Biswajit, . MNRAS . 475-999 . 2018 . 2018MNRAS.475..999B ,
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2015-10-05T15:34:04Z/2015-10-06T07:47:24Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2016-10-16T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-10-16T22:00:00Z, 076486, 17.56_20190403_1200. https://doi.org/10.5270/esa-fyr2xuw