The Burst Spectra of EXO 0748-676 during a Long 2003 XMM-Newton Observation

Abstract

Gravitationally redshifted absorption lines from highly ionized iron have been previously identified in the burst spectra of the neutron star in EXO 0748-676. To repeat this detection we obtained a long, nearly 600 ks observation of the source with XMM-Newton in 2003. The spectral features seen in the burst spectra from the initial data are not reproduced in the burst spectra from this new data. In this paper we present the spectra from the 2003 observations and discuss the sensitivity of the absorption structure to changes in the photospheric conditions.

18 Pages, 3 Figures. Accepted for publication in ApJ

References in corpus (1)

• Discovery of X-ray burst triplets in EXO 0748-676

Cited by in corpus (12)

• Constraints on a phenomenologically parameterized neutron-star equation of state
• Thermonuclear (type-I) X-ray bursts observed by the Rossi X-ray Timing Explorer
• The Masses and Spins of Neutron Stars and Stellar-Mass Black Holes
• Nucleosynthesis in Type I X-ray Bursts
• Absorption features in the spectra of X-ray bursting neutron stars
• Impact of the equation-of-state -- gravity degeneracy on constraining the nuclear symmetry energy from astrophysical observables
• Gravitational radiation from crystalline color-superconducting hybrid stars
• NuSTAR observation of a Type I X-ray burst from GRS 1741.9-2853
• Deconfinement of neutron star matter within the Nambu-Jona-Lasinio model
• The Incompatibility of Rapid Rotation with Narrow Photospheric X-ray Lines in EXO 0748-676
• Gemini/GMOS Spectroscopy of EXO 0748-676 (=UY Vol) in Outburst
• The Quest for the Nuclear Equation of State