The isolated neutron star RBS1774 revisited

A. D. Schwope, T. Erben, J. Kohnert, G. Lamer, M. Steinmetz, K. Strassmeier, H. Zinnecker, Jill Bechtold, E. Diolaiti, A. Fontana, S. Gallozzi, E. Giallongo, R. Ragazzoni, C. De Santis, V. Testa

Research output: Contribution to journalArticle

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Abstract

We report optical B-band observations with the Large Binocular Telescope (LBT) of the isolated neutron star RBS1774. The stacked image with a total exposure of 2.h5 reveals a candidate optical counterpart at m B = 26.96 0.20 at position α(2000) = 21h43m03.s40, δ(2000) = +06°5417.5, within the joint Chandra and XMM-Newton error circles. We analyse archival XMM-Newton observations and derive revised spectral and positional parameters. The predicted optical flux from the extrapolated X-ray spectrum is likely twice as high as reported before. The measured optical flux exceeds the extrapolated X-ray spectral flux by a factor ̃ 40 (15-60 at 1σ confidence). We interpret our detection and the spectral energy distribution as further evidence of a temperature structure over the neutron star's surface and present a pure thermal model reflecting both the SED and the pulsed fraction of the light curve.

Original languageEnglish (US)
Pages (from-to)267-272
Number of pages6
JournalAstronomy and Astrophysics
Volume499
Issue number1
DOIs
StatePublished - May 2009

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neutron stars
XMM-Newton telescope
newton
spectral energy distribution
light curve
confidence
x rays
telescopes
energy
temperature
detection
distribution
exposure
parameter

Keywords

  • Stars: individual: RBS1774
  • Stars: neutron
  • X-rays: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Schwope, A. D., Erben, T., Kohnert, J., Lamer, G., Steinmetz, M., Strassmeier, K., ... Testa, V. (2009). The isolated neutron star RBS1774 revisited. Astronomy and Astrophysics, 499(1), 267-272. https://doi.org/10.1051/0004-6361/200811041

The isolated neutron star RBS1774 revisited. / Schwope, A. D.; Erben, T.; Kohnert, J.; Lamer, G.; Steinmetz, M.; Strassmeier, K.; Zinnecker, H.; Bechtold, Jill; Diolaiti, E.; Fontana, A.; Gallozzi, S.; Giallongo, E.; Ragazzoni, R.; De Santis, C.; Testa, V.

In: Astronomy and Astrophysics, Vol. 499, No. 1, 05.2009, p. 267-272.

Research output: Contribution to journalArticle

Schwope, AD, Erben, T, Kohnert, J, Lamer, G, Steinmetz, M, Strassmeier, K, Zinnecker, H, Bechtold, J, Diolaiti, E, Fontana, A, Gallozzi, S, Giallongo, E, Ragazzoni, R, De Santis, C & Testa, V 2009, 'The isolated neutron star RBS1774 revisited', Astronomy and Astrophysics, vol. 499, no. 1, pp. 267-272. https://doi.org/10.1051/0004-6361/200811041
Schwope AD, Erben T, Kohnert J, Lamer G, Steinmetz M, Strassmeier K et al. The isolated neutron star RBS1774 revisited. Astronomy and Astrophysics. 2009 May;499(1):267-272. https://doi.org/10.1051/0004-6361/200811041
Schwope, A. D. ; Erben, T. ; Kohnert, J. ; Lamer, G. ; Steinmetz, M. ; Strassmeier, K. ; Zinnecker, H. ; Bechtold, Jill ; Diolaiti, E. ; Fontana, A. ; Gallozzi, S. ; Giallongo, E. ; Ragazzoni, R. ; De Santis, C. ; Testa, V. / The isolated neutron star RBS1774 revisited. In: Astronomy and Astrophysics. 2009 ; Vol. 499, No. 1. pp. 267-272.
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