1. すざくによる高銀緯 フェルミ未同定天体の X 線探 査 (submitted to ApJ) 前田洸登 （早大理工） 2010/09/24 日本天文学会 2010 年 秋季年会 @ 金沢大学 片岡淳，中森健之（早大），真喜屋龍，戸谷友則（京大） 金井義和，河合誠之（東工大）， Lukasz Stawarz ，田中康之， 佐藤理江，高橋忠幸（ ISAS/JAXA ）， C. Cheung （ NASA/GSFC ）， D. Donato ， N. Gehrels （ CRESST ）， P. Saz Parkinson （ SCIPP ）

2. EGRET All-Sky Gamma-Ray Survey ( > 100MeV) Credit: EGRET team CGRO/EGRET all-sky  -ray Survey ● UnID : 170 sources （ 271 sources ）

3. 640 out of 1451 sources are still UnID

4. Motivation of Suzaku observation To survey a new-type  -ray source To survey a new-type  -ray source Bright in the long term, but still unID Bright in the long term, but still unID Extragalactic, but Not AGN Extragalactic, but Not AGN Source selection (3 months Fermi obs.) Source selection (3 months Fermi obs.) Bright unID source (EGRET and 0FGL) Bright unID source (EGRET and 0FGL) At high Galactic latitude (|b| > 10 [deg]) At high Galactic latitude (|b| > 10 [deg]) No temporal variability No temporal variability

5. Observed UnID Fermi/LAT Object Fermi/LAT Gamma-ray Image of 1-year Observation (100MeV - 300GeV) Credit: NASA/DOE/Fermi LAT Collaboration 1FGL J1231.1-1410 1FGL J1311.7-3429 1FGL J1333.2+5056 1FGL J2017.3+0603 |b|=10 [deg]

6. Results of Suzaku Follow-up Observation 1FGL J1231.1-14101FGL J1311.7-3429 1FGL J2017.3+06031FGL J1333.2+5056 - Too much complicated - Run off the edge of FOV

7. 1FGL J1231.1-1410 X-ray Image Brightest  -ray source of 4 unIDs Brightest  -ray source of 4 unIDs EGRET unID EGRET unID (Radio) MSP PSR J1231-1411 (Radio) MSP PSR J1231-1411 Ransom et al. 2010 Ransom et al. 2010 X-ray position is consistent with  -ray & radio position X-ray position is consistent with  -ray & radio position Dec.[deg] R.A.[deg] Suzaku XIS0+3 (0.4 - 10 keV) (NXB subtracted, exposure & vignetting corrected) PSR J1231-1411 (P=3.68ms,d=0.4kpc)

8. X-ray Spectrum Analysis (Black:XIS0+3,Red:XIS1) kT ~ 0.16 keV Γ ~ 1.8 wabs * blackbodywabs ( blackbody + powerlaw ) improved Residuals remain (> 2 keV) N H =0 consistent Additional PL component is necessary! (significance level >99%)

9. 1FGL J1231.1-1410 F multi-wavelength SED Multi-wavelength SED of Geminga pulsar Credit:: D. J. Thompson (2004) Bright  -ray flux & blackbody + PL is similar to the spectral structure of Geminga pulsar

10. EGRET unID EGRET unID Two X-ray sources Two X-ray sources Suzaku XIS0+3 (0.4 - 10 keV) (NXB subtracted, exposure & vignetting corrected ) 1FGL J1311.7-3429 X-ray Image (b) src B steady flux Dec.[deg] R.A.[deg] (a) src A X-ray flare 20 ks factor 10

11. 1FGL J1311.7-3429 F multi-wavelength SED No pulse detection (  -ray, radio) Remain uncertain (not typical blazar) QHB (QSO Hosted Blazar) ?! ?

12. 1FGL J2017.3+0603 X-ray Image Fermi unID Fermi unID (Radio) MSP PSR J2017+0603: (Radio) MSP PSR J2017+0603: Cognard et al. 2010 (P=2.9ms) Cognard et al. 2010 (P=2.9ms)  -ray pulsation  -ray pulsation CLASS J2017+0603: (z=1.74 blazar) CLASS J2017+0603: (z=1.74 blazar) Dec.[deg] R.A.[deg] Suzaku XIS0+3 (0.4 - 10 keV) (NXB subtracted, exposure & vignetting corrected)

13. 1FGL J2017.3+0603 F multi-wavelength SED CLASS J2017+0603 PSR J2017+0603

14. Summary Our Suzaku observation findings Our Suzaku observation findings 1FGL J1231.1-1410 : newly detected PL component of MSP 1FGL J1231.1-1410 : newly detected PL component of MSP 1FGL J1311.7-3429 : detected variable X-ray source but still uncertain (QHB blazar?) 1FGL J1311.7-3429 : detected variable X-ray source but still uncertain (QHB blazar?) 1FGL J2017.3+0603 : only detected a blazar and not a pulsar in X-ray (give a pulsar upper-limit) 1FGL J2017.3+0603 : only detected a blazar and not a pulsar in X-ray (give a pulsar upper-limit) 1FGL J1333.2+5056 : too much complicated due to large localization error 1FGL J1333.2+5056 : too much complicated due to large localization error

15. Next X-ray observations (AO-5) Coming Soon!

17. “Unraveling the Nature of Unidentified High Galactic Latitude Fermi/LAT Gamma-ray Sources with Suzaku“ (submitted to ApJ) Koto Maeda Waseda University J. Kataoka, T. Nakamori, L. Stawarz, R. Makiya, T. Totani, C. C. Cheung, D. Donato, N. Gehrels, P. M. Saz Parkinson, Y. Kanai, N. Kawai, Y. Tanaka, R. Sato, T. Takahashi

18. Outline Selection of UnID Fermi/LAT Objects Selection of UnID Fermi/LAT Objects Follow-up Observation with Suzaku Follow-up Observation with Suzaku 1FGL J1231.1-1410 1FGL J1231.1-1410 1FGL J1311.7-3429 1FGL J1311.7-3429 1FGL J1333.2+5056 1FGL J1333.2+5056 1FGL J2017.3+0603 1FGL J2017.3+0603 Summary Summary X-ray Analysis & Multi-wavelength SED

19. X-ray fitting models for 1FGL J1231.1-1410 Wabs ( Bbody + Power Law ) Wabs ( Bbody + Power Law ) Power Law : Power Law : Wabs : X-ray Absorption Wabs : X-ray Absorption Bbody : Blackbody Bbody : Blackbody

20. PL Estimation by taking Background

21. X-ray spectrum of 1FGL J1311 (Wabs * PowerLaw) srcB N H = 4.45×10 20 (fixed) Γ = 1.34 +/- 0.10 norm.= (2.08 +/- 0.44)×10 -5 χ 2 /dof = 42.1 / 38 S 2-8keV = 1.19×10 -13 erg/cm 2 /s srcA N H = 4.45×10 20 (fixed) Γ = 1.38 +/- 0.09 norm.= (2.69 +/- 0.47)×10 -5 χ 2 /dof = 42.6 / 38 S 2-8keV = 1.44×10 -13 erg/cm 2 /s

22. 1FGL J1333.2+5056 X-ray Image (0.4-10 keV) Several sources were found (>4  ; 5 sources ） Several sources were found (>4  ; 5 sources ） Candidate: (src D) FSRQ CLASS J1333+5057 Candidate: (src D) FSRQ CLASS J1333+5057 Large localization error of 1FGL Large localization error of 1FGL Dec.[deg] R.A.[deg] X-ray Image of Suzaku XIS0+1+3 (0.4-10 keV) (NXB subtracting, Exposure/Vignetting correction) CLASS J1333+5057 （ z=1.36 ） !?

23. 1FGL J1311 18 months error circle

24. 1FGL J1333 18 months error circle

25. 1FGL J2017 18 months error circle