Near-infrared, optical, and X-ray observations of the anomalous X-ray pulsar 4U 0142 + 61

Mikio Morii*, Nobuyuki Kawai, Jun Kataoka, Yoichi Yatsu, Naoto Kobayashi, Hiroshi Terada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


We present results from the simultaneous observations of an anomalous X-ray pulsar (AXP) 4U 0142 + 61 on Sep. 2003. We used RXTE, Subaru, and UH88 telescopes to cover X-ray, near-infrared (NIR) (JHK′), and optical (BVRI) bands, respectively. We obtained a simultaneous broadband spectrum for the first time among AXPs. We found NIR excess in the spectrum, which may be another component different from the optical one. We also found a R band dip. We discuss the broadband spectrum covering the optical and X-ray bands in the framework of a self absorbed synchrotron emission from the magnetosphere of magnetar. We also discuss about the R band dip feature, which could put a restriction on the emission models of magnetars.

Original languageEnglish
Pages (from-to)1177-1180
Number of pages4
JournalAdvances in Space Research
Issue number6
Publication statusPublished - 2005
Externally publishedYes


  • Anomalous X-ray pulsar
  • Magnetar
  • Neutron star

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences


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