A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1

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Abstract

We present the preliminary spectral analysis of a 25 ks long Chandra observation of the peculiar source Cir X-1 near the periastron passage. We estimate more precise coordinates of the source compatible with the optical and radio counterpart coordinates. We detect emission lines associated to Mg XII, Si XIII, Si XIV, S XV, S XVI Ar XVII, Ar XVIII, Ca XIX, Ca XX, Fe XXV, Fe XXVI showing a redshift of 470 km s-1. The more intense emission features at 6.6 keV show a double-peaked shape that can be modelled with two or three Gaussian lines.
Original languageEnglish
Title of host publicationInternational Conference on Astrophysics of Compact Objects
Pages248-250
Number of pages3
Publication statusPublished - 2008

Publication series

NameAIP CONFERENCE PROCEEDINGS

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All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation

Cite this

Robba, N., Di Salvo, T., Iaria, R., D'Ai', A., & Burderi (2008). A Preliminary Analysis of a New Chandra Observation (ObsID 6148) of Cir X-1. In International Conference on Astrophysics of Compact Objects (pp. 248-250). (AIP CONFERENCE PROCEEDINGS).