すざくによる高銀緯すざくによる高銀緯フェルミ未同定天体のフェルミ未同定天体の XX 線探線探

査査(submitted to ApJ)(submitted to ApJ)

前田洸登 （早大理工）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）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）， 金井義和，河合誠之（東工大）， Lukasz StawarzLukasz Stawarz ，田中康之，，田中康之，佐藤理江，高橋忠幸（佐藤理江，高橋忠幸（ ISAS/JAXAISAS/JAXA ），）， C. CheungC. Cheung （（ NASA/GSFNASA/GSF

CC ），），D. DonatoD. Donato ，， N. GehrelsN. Gehrels （（ CRESSTCRESST ），）， P. Saz P. Saz

ParkinsonParkinson （（ SCIPPSCIPP ））

EGRET All-Sky Gamma-Ray Survey ( > 100MeV)Credit: EGRET team

CGRO/EGRET all-sky CGRO/EGRET all-sky -ray Survey-ray Survey

● UnID : 170 sources

（ 271 sources ）

640 out of 1451 sources are still UnID640 out of 1451 sources are still UnID

Motivation of Suzaku observationMotivation of Suzaku observation

To survey a new-type To survey a new-type -ray source-ray sourceBright in the long term, but still unIDBright in the long term, but still unIDExtragalactic, but Not AGNExtragalactic, but Not AGN

Source selection (3 months Fermi obs.)Source selection (3 months Fermi obs.)BrightBright unIDunID source (EGRET and 0FGL) source (EGRET and 0FGL)At high Galactic latitude (|b| > 10 [deg])At high Galactic latitude (|b| > 10 [deg])No temporal variabilityNo temporal variability

Observed UnID Fermi/LAT ObjectObserved 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 J1311.7-34291FGL J1333.2+5056

1FGL J2017.3+0603

|b|=10 [deg]

Results of Suzaku Follow-up ObservationResults of Suzaku Follow-up Observation

1FGL J1231.1-1410 1FGL J1311.7-3429

1FGL J2017.3+06031FGL J1333.2+5056

- Too much complicated- Too much complicated- Run off the edge of FOV- Run off the edge of FOV

1FGL J1231.1-1410 X-ray Image1FGL J1231.1-1410 X-ray Image

Brightest Brightest -ray -ray source of 4 unIDssource of 4 unIDs

EGRET unIDEGRET unID (Radio) MSP PSR(Radio) MSP PSR

J1231-1411J1231-1411 Ransom et al. 2010Ransom et al. 2010

X-ray position is X-ray position is consistent with consistent with -ray -ray & radio position& radio position

De

c.[

de

g]

R.A.[deg]Suzaku XIS0+3 (0.4 - 10 keV)(NXB subtracted, exposure & vignetting corrected)

PSR J1231-1411(P=3.68ms,d=0.4kpc)

X-ray Spectrum AnalysisX-ray Spectrum Analysis (Black:XIS0+3,Red:XIS1)(Black:XIS0+3,Red:XIS1)

kT ~ 0.16 keV

Γ ~ 1.8

wabs * blackbody wabs ( blackbody + powerlaw )

322.56d.o.f.2 improved

Residuals remain(> 2 keV)

347.134d.o.f2

NH=0 consistent NH=0 consistent

Additional PL component is necessary! (significance level >99%)

1FGL J1231.1-14101FGL J1231.1-1410FF multi-wavelength SED multi-wavelength SED

Multi-wavelength SED of Geminga pulsarCredit:: D. J. Thompson (2004)

Bright -ray flux & blackbody + PL is similar to the spectral structure of Geminga pulsar

EGRET unIDEGRET unIDTwo X-ray sourcesTwo X-ray sources

Suzaku XIS0+3 (0.4 - 10 keV)(NXB subtracted, exposure & vignetting corrected )

1FGL J1311.7-3429 X-ray Image1FGL J1311.7-3429 X-ray Image

(b) src B steady flux

De

c.[

de

g]

R.A.[deg]

(a) src A X-ray flare

20 ks

factor 10

1FGL J1311.7-34291FGL J1311.7-3429 FF multi-wavelength SED multi-wavelength SED

No pulse detection (-ray, radio)Remain uncertain (not typical blazar)

QHB (QSO Hosted Blazar) ?!

?

1FGL J2017.3+0603 1FGL J2017.3+0603 X-ray ImageX-ray Image

Fermi unIDFermi unID (Radio) MSP PSR (Radio) MSP PSR

J2017+0603:J2017+0603: Cognard et al. 2010 Cognard et al. 2010

(P=2.9ms)(P=2.9ms)

-ray pulsation-ray pulsation CLASS CLASS

J2017+0603:J2017+0603:(z=1.74 blazar)(z=1.74 blazar)

De

c.[

de

g]

R.A.[deg] Suzaku XIS0+3 (0.4 - 10 keV)(NXB subtracted, exposure & vignetting corrected)

1FGL J2017.3+06031FGL J2017.3+0603 FF multi-wavelength SED multi-wavelength SED

CLASS J2017+0603

PSR J2017+0603

]s cm [erg 1061.2

Limit Upper 90%ray -X1214

keV 82

S

SummarySummary Our Suzaku observation findingsOur Suzaku observation findings

1FGL J1231.1-1410 :1FGL J1231.1-1410 :newly detected PL component of MSPnewly detected PL component of MSP

1FGL J1311.7-3429 : 1FGL J1311.7-3429 : detected variable X-ray source detected variable X-ray source but still uncertain (QHB blazar?)but still uncertain (QHB blazar?)

1FGL J2017.3+0603 : 1FGL J2017.3+0603 : only detected a blazar and not a pulsar only detected a blazar and not a pulsar in X-ray (give a pulsar upper-limit)in X-ray (give a pulsar upper-limit)

1FGL J1333.2+5056 :1FGL J1333.2+5056 :too much complicated too much complicated due to large localization errordue to large localization error

Next X-ray observations (AO-5)Next X-ray observations (AO-5)

Coming Soon!

Coming Soon!