Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-23
Astrophys.J.652:548-553,2006
Astronomy and Astrophysics
Astrophysics
8 pages, 2 figures, accepted for publication in ApJ. Added content, Figure 1 has been replaced, changed organization of text,
Scientific paper
10.1086/507262
We present the results of Chandra X-ray Observatory observations of the transient anomalous X-ray pulsar (AXP) candidate AX J1845.0-0258 in apparent quiescence. Within the source's error circle, we find a point source and possible counterpart, which we designate CXOU J184454.6-025653. No coherent pulsations are detected, and no extended emission is seen. The source's spectrum is equally well described by a blackbody model of temperature kT~2.0 keV or a power law model with photon index Gamma~1.0. This is considerably harder than was seen for AX J1845.0-0258 during its period of brightening in 1993 (kT~0.6 keV) despite being at least ~13 times fainter. This behavior is opposite to that observed in the case of the established transient AXP, XTE J1810-197. We therefore explore the possibility that CXOU J184454.6-025653 is an unrelated source, and that AX J1845.0-0258 remains undetected since 1993, with flux 260-430 times fainter than at that epoch. If so, this would represent an unprecedented range of variability in AXPs.
Gaensler Bryan M.
Gotthelf Eric Van
Kaspi Victoria M.
Tam Cindy R.
No associations
LandOfFree
Chandra Observations of the Transient 7-s X-ray Pulsar AX J1845.0-0258 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Chandra Observations of the Transient 7-s X-ray Pulsar AX J1845.0-0258, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra Observations of the Transient 7-s X-ray Pulsar AX J1845.0-0258 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-223447