SUZAKU X-RAY FOLLOW-UP OBSERVATIONS OF SEVEN UNASSOCIATED FERMI-LAT GAMMA-RAY SOURCES AT HIGH GALACTIC LATITUDES
Takahashi, Y; Kataoka, J; Nakamori, T; Maeda, K; Makiya, R; Totani, T; Cheung, CC; Stawarz, L; Guillemot, L; Freire, PCC; Cognard, I
| HERO ID | 2289370 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | SUZAKU X-RAY FOLLOW-UP OBSERVATIONS OF SEVEN UNASSOCIATED FERMI-LAT GAMMA-RAY SOURCES AT HIGH GALACTIC LATITUDES |
| Authors | Takahashi, Y; Kataoka, J; Nakamori, T; Maeda, K; Makiya, R; Totani, T; Cheung, CC; Stawarz, L; Guillemot, L; Freire, PCC; Cognard, I |
| Journal | The Astrophysical Journal |
| Volume | 747 |
| Issue | 1 |
| Abstract | We report on our second-year campaign of X-ray follow-up observations of unidentified Fermi Large Area Telescope (LAT) gamma-ray sources at high Galactic latitudes (vertical bar b vertical bar > 10 degrees) using the X-ray Imaging Spectrometer on board the Suzaku X-ray Observatory. In this second year of the project, seven new targets were selected from the First Fermi-LAT Catalog, and studied with 20-40 ks effective Suzaku exposures. We detected an X-ray point source coincident with the position of the recently discovered millisecond pulsar (MSP) PSR J2302+4442 within the 95% confidence error circle of 1FGL J2302.8+4443. The X-ray spectrum of the detected counterpart was well fit by a blackbody model with temperature of kT similar or equal to 0.3 keV, consistent with an origin of the observed X-ray photons from the surface of a rotating magnetized neutron star. For four other targets that were also recently identified with a normal pulsar (1FGL J0106.7+4853) and MSPs (1FGL J1312.6+0048, J1902.0-5110, and J2043.2+1709), only upper limits in the 0.5-10 keV band were obtained at the flux levels of similar or equal to 10(-14) erg cm(-2) s(-1). A weak X-ray source was found in the field of 1FGL J1739.4+8717, but its association with the variable gamma-ray emitter could not be confirmed with the available Suzaku data alone. For the remaining Fermi-LAT object 1FGL J1743.8-7620 no X-ray source was detected within the LAT 95% error ellipse. We briefly discuss the general properties of the observed high Galactic-latitude Fermi-LAT objects by comparing their multiwavelength properties with those of known blazars and MSPs. |
| Doi | 10.1088/0004-637X/747/1/64 |
| Wosid | WOS:000300627300064 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | galaxies: active; gamma rays: general; pulsars: general; pulsars: individual (PSR J2302+4442); X-rays: general |