Precise localization of the soft gamma repeater SGR 1627-41 and the anomalous X-ray pulsar AXP 1E1841-045 with Chandra

Stefanie Wachter, Sandeep K. Patel, Chryssa Kouveliotou, Patrice Bouchet, Feryal Özel, Allyn F. Tennant, Peter M. Woods, Kevin Hurley, Werner Becker, Patrick Slane

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We present precise localizations of AXP 1E1841-045 and SGR 1627-41 with Chandra. We obtained new infrared observations of SGR 1627-41 and reanalyzed archival observations of AXP 1E1841-045 in order to refine their positions and search for infrared counterparts. A faint source is detected inside the error circle of AXP 1E1841-045. In the case of SGR 1627-41, several sources are located within the error radius of the X-ray position, and we discuss the likelihood of one of them being the counterpart. We compare the properties of our candidates to those of other known anomalous X-ray pulsar (AXP) and soft gamma repeater (SGR) counterparts. We find that the counterpart candidates for SGR 1627-41 and SGR 1806-20 would have to be intrinsically much brighter than AXPs in order to have counterparts detectable with the observational limits currently available for these sources. To confirm the reported counterpart of SGR 1806-20, we obtained new infrared observations during the 2003 July burst activation of the source. No brightening of the suggested counterpart is detected, implying that the counterpart of SGR 1806-20 remains yet to be identified.

Original languageEnglish (US)
Pages (from-to)887-896
Number of pages10
JournalAstrophysical Journal
Issue number2 I
StatePublished - Nov 10 2004


  • Gamma rays: bursts
  • Infrared: stars
  • Stars: individual (1E 1841-045, SAX J1635.8-4736, SGR 1627-41)
  • Stars: neutron
  • X-rays: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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