Other
Scientific paper
Mar 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...21116213c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #162.13
Other
Scientific paper
Periodicity search in gamma-ray data is usually difficult because of the small number of detected photons. Period in the emission of other energy bands from the counterpart to the gamma-ray source may help to establish the periodicity in the gamma-ray emission and strengthen the identification of the source in different energy bands. It may, however, still be difficult to find the period directly from X-ray data because of limited exposure. We developed a procedure, by cross-checking two X-ray data sets, to find candidate periods for X-ray sources which are possible counterparts to gamma-ray pulsar candidates. Here we report the results of this method obtained with all the currently available X-ray data of 9 X-ray sources. Some tempting periodicity features were found, such as that at 127.51210(7) ms for RX J0007.0+7302 (MJD 50107.83546), 202.9690(1) ms for AX J1418.2-6047 (MJD 50317.00728), 159.35800(7) ms for AX J1418.6-6045 (MJD 50317.00728), 145.26767(4) ms for AX J1420.1-6049 (MJD 51223.68495), and 167.9234(3) ms for AX J1836.2+5928 (MJD 50800.00499). These candidate periods can serve as the target periods for future search when new data become available so that a blind search with a huge number of trials can be avoided.
This work was supported by the National Science Council and National Space Organization of the Republic of China.
Chang Hsiang Kuang
Lin Lin
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