Low X-ray Efficiency of a Young High-B Pulsar PSR J1208-6238 Observed with Chandra
Aya Bamba (1, 2), Eri Watanabe (3), Koji Mori (4), Shinpei Shibata (3), Yukikatsu Terada (5), Hidetoshi Sano (6, 7), Miroslav D. Filipovic (8) ((1), U. Tokyo, (2) RESCEU U. Tokyo, (3) Yamagata U., (4) U. Miyazaki, (5) Saitama, U., (6) Nagoya U., (7) NAOJ, (8) Western Sydney U.)
TL;DR
This study reports a stringent upper limit on the X-ray emission from the young high-B pulsar PSR J1208-6238 using Chandra observations, highlighting its unusually low X-ray efficiency compared to expectations.
Contribution
First X-ray flux upper limit established for PSR J1208-6238, providing insights into its emission properties and the nature of high-B pulsars.
Findings
No significant X-ray source detected at pulsar location
Upper limit on X-ray flux is (2.2-10.0)e-14 erg/s/cm2
Results suggest low X-ray efficiency of the pulsar
Abstract
High magnetic field (high-B) pulsars are key sources to bridge magnetars and conventional rotation powered pulsars, and thus to understand the origin of magnetar activities. We have estimated a tight upper-limit on the X-ray flux of one of the youngest high-B pulsars PSR J1208-6238 for the first time; a Chandra 10 ks observation shows no significant source. Depending on the emission models, the 3sigma upper-limit on the intrinsic 0.5-7 keV flux to (2.2-10.0)e-14 erg/s/cm2.
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