High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation.

Tiziana Di Salvo, Natale Robba, Rosario Iaria, Antonino D'Ai', Van Der Klis, Burderi, Mendez, Giuseppe Lavagetto

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2 Citazioni (Scopus)

Abstract

We report on a simultaneous Chandra and RossiXTE observation of the LMXB atoll bursting source 4U 1728-34 performed on 2002 March 3-5. We fitted the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized component. An overabundance of Si by a factor of ~2 with respect to Solar abundance is required for a satisfactory fit. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 1.6 keV) Gaussian emission line, or, alternatively, by absorption edges associated with Fe I and Fe XXV at ~7.1 keV and ~9 keV, respectively. In this interpretation, we find no evidence of a broad, or narrow Fe Kalpha line, between 6 and 7 keV. We tested our alternative modeling of the iron Kalpha region by reanalyzing a previous BeppoSAX observation of 4U 1728-34, finding a general agreement with our new spectral model.
Lingua originaleEnglish
Titolo della pubblicazione ospiteAIP Conference Proceedings
Pagine545-548
Numero di pagine4
Stato di pubblicazionePublished - 2005

Serie di pubblicazioni

NomeAIP CONFERENCE PROCEEDINGS

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X Ray Timing Explorer
high resolution
spectroscopy
continuums
iron

All Science Journal Classification (ASJC) codes

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

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Di Salvo, T., Robba, N., Iaria, R., D'Ai', A., Van Der Klis, Burderi, ... Lavagetto, G. (2005). High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation. In AIP Conference Proceedings (pagg. 545-548). (AIP CONFERENCE PROCEEDINGS).

High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation. / Di Salvo, Tiziana; Robba, Natale; Iaria, Rosario; D'Ai', Antonino; Van Der Klis; Burderi; Mendez; Lavagetto, Giuseppe.

AIP Conference Proceedings. 2005. pag. 545-548 (AIP CONFERENCE PROCEEDINGS).

Risultato della ricerca: Chapter

Di Salvo, T, Robba, N, Iaria, R, D'Ai', A, Van Der Klis, Burderi, Mendez & Lavagetto, G 2005, High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation. in AIP Conference Proceedings. AIP CONFERENCE PROCEEDINGS, pagg. 545-548.
Di Salvo T, Robba N, Iaria R, D'Ai' A, Van Der Klis, Burderi e altri. High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation. In AIP Conference Proceedings. 2005. pag. 545-548. (AIP CONFERENCE PROCEEDINGS).
Di Salvo, Tiziana ; Robba, Natale ; Iaria, Rosario ; D'Ai', Antonino ; Van Der Klis ; Burderi ; Mendez ; Lavagetto, Giuseppe. / High resolution Spectroscopy of 4U 1728-34 from a Simultaneous Chandra-RXTE Observation. AIP Conference Proceedings. 2005. pagg. 545-548 (AIP CONFERENCE PROCEEDINGS).
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abstract = "We report on a simultaneous Chandra and RossiXTE observation of the LMXB atoll bursting source 4U 1728-34 performed on 2002 March 3-5. We fitted the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized component. An overabundance of Si by a factor of ~2 with respect to Solar abundance is required for a satisfactory fit. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 1.6 keV) Gaussian emission line, or, alternatively, by absorption edges associated with Fe I and Fe XXV at ~7.1 keV and ~9 keV, respectively. In this interpretation, we find no evidence of a broad, or narrow Fe Kalpha line, between 6 and 7 keV. We tested our alternative modeling of the iron Kalpha region by reanalyzing a previous BeppoSAX observation of 4U 1728-34, finding a general agreement with our new spectral model.",
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AU - Van Der Klis, null

AU - Burderi, null

AU - Mendez, null

AU - Lavagetto, Giuseppe

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N2 - We report on a simultaneous Chandra and RossiXTE observation of the LMXB atoll bursting source 4U 1728-34 performed on 2002 March 3-5. We fitted the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized component. An overabundance of Si by a factor of ~2 with respect to Solar abundance is required for a satisfactory fit. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 1.6 keV) Gaussian emission line, or, alternatively, by absorption edges associated with Fe I and Fe XXV at ~7.1 keV and ~9 keV, respectively. In this interpretation, we find no evidence of a broad, or narrow Fe Kalpha line, between 6 and 7 keV. We tested our alternative modeling of the iron Kalpha region by reanalyzing a previous BeppoSAX observation of 4U 1728-34, finding a general agreement with our new spectral model.

AB - We report on a simultaneous Chandra and RossiXTE observation of the LMXB atoll bursting source 4U 1728-34 performed on 2002 March 3-5. We fitted the 1.2-35 keV continuum spectrum with a blackbody plus a Comptonized component. An overabundance of Si by a factor of ~2 with respect to Solar abundance is required for a satisfactory fit. Large residuals at 6-10 keV can be fitted by a broad (FWHM ~ 1.6 keV) Gaussian emission line, or, alternatively, by absorption edges associated with Fe I and Fe XXV at ~7.1 keV and ~9 keV, respectively. In this interpretation, we find no evidence of a broad, or narrow Fe Kalpha line, between 6 and 7 keV. We tested our alternative modeling of the iron Kalpha region by reanalyzing a previous BeppoSAX observation of 4U 1728-34, finding a general agreement with our new spectral model.

UR - http://hdl.handle.net/10447/7553

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