Periodicity Search in X-ray data of RX J0007.0+7302 4 Gamma-Ray sources and their counterparts About RX J0007.0+7302 XMM-Newton and ASCA Intriguing Features in our data The whole plan of my work

Study of EGRET sources March 30, 2004 Reference: Hartman et. c The Third EGRET Catalog of High-Energy Gamma-Ray Sources ApJ, 123:79-202, 1999 July The Third EGRET Catalog consists of 271 sources: 5 pulsars, 1 solar flare, 66 high-confidence blazar identifications, 27 possible blazar identifications, 1 likely radio galaxy (Cen A), 1 normal galaxy (LMC), and 170 unidentified sources.

Study of EGRET sources History 1st EGRET catalogue: 127 (1EG) 2nd EGRET catalogue: 129 (2EG) Supplement to 2nd EGRET catalogue: 157 (2EGS) 3th EGRET catalogue: 271 (3EG) Oct, 2002

Properties of Gamma-Ray Pulsars (D.J. Thompson et al, 1999)

4 γ-ray Sources 1. 3EG J1835+5918/RX J1836.2+5925 4. GEV J1417-6100/AX J1420.1-6049 Reference: Reimer et. c MNRAS, 324:772-780, 2001

About RX J0007.0+7302 At the center of SNR CTA 1 Right Ascension: 00 06 40 Declination: +72 45 Size (/arcmin): 90? (~107 ׳) Flux density at 1 GHz (/Jy): 36 Spectral Index: 0.6 Kinematic distance: 1.4 0.3 kpc Another name : G119.5+10.2; 2EG J0008+7307 (?); GRO J0004+73; RX J0007.0+7302 At the center of SNR CTA 1 Image of the observation Reference: Slane et. c ApJ, 601:1045-1049, 2004 Feb.

About RX J0007.0+7302 No radio counterpart to RX J0007.0+7302 is identified in a list of compact sources by Pineault et al.(1993) List of observation data: Date PI offset exposure time (s) $ ASCA 1996/1/25 Slane 4.723 CTA1_center 46960(Gis) 41264(Sis) $Chandra 2003/4/13 Halpern 0.174 RX J0007.0+7303 50.14k(Acis-S) 2004/4/13 Murray 0.000 WGA J000702_7302.9 75k(HRC-I) $ROSAT 1996/12/31 Seward 6.225 CTA1_center 10511(PSPCB) 44.254 CTA1_south 7018(PSPCB) 31.723 CTA1_EAST 7011(PSPCB) 1997/2/9 21.259 1E 0000+726 1920(HRI) 1225(HRI) $XMM 2002/2/21 Slane 0.015 CTA1 40000

About RX J0007.0+7302 ASCA observations show that the diffuse central emission is nonthermal, presumably corresponding to a wind nebula by a active NS. Reference: Slane et. c ApJ, 601:1045-1049, 2004 Feb.

About RX J0007.0+7302 A substructure in the inner portions Note: 60ks ASCA observation which was used to observe the southern shell of the SNR was carried out on 1997 Feb. 10 A substructure in the inner portions of the extended nebula. Such structure is now known to be in PWNe, as illustrated by high resolution X-ray images of the Crab and Vela pulsars.

XMM-Newton and ASCA XMM-Newton (1999 -) ASCA (1993-2001) Very large collecting area, simultaneous X-ray & Optical observations. Energy range: 0.1 – 15 keV PI: European Space Agency ASCA (1993-2001) Japan’s 4th cosmic X-ray astronomy mission. Energy range: 0.4-10 keV. First satellite to use CCD detector for X-ray astronomy. PI:Japan/US Catalog: AX hhmm.m ±ddmm (e.g. AX J1749.2-2725)

Basic characteristics of XMM-Newton XMM-Newton provides three types of science instrument: European Photon Imaging Camera (EPIC) Reflection Grating Spectrometer (RGS) Optical Monitor (OM) Basic characteristics: High sensitivity Simultaneous operation of all science instruments Good angular resolution Moderate and high spectral resolution Simultaneous optical/UV observations Long continuous target visibility

Basic characteristics of ASCA Lifetime : February 20, 1993 - March 2, 2001 Four X-ray telescopes (1) Gas Imaging Spectrometer (GIS; 0.8-12 keV) (2) Solid-state Imaging Spectrometer (SIS; 0.4-12 keV) Description of GIS modes: % PH (pulse height) mode --70 % MPC (multi-channel pulse count) mode --71 Description of SIS modes: % clocking mode: 4, 2, 1-CCD mode % data mode: Faint mode -- 01 Bright mode -- 02 or 12 Fast mode -- 03 Time resolution of each mode??

Periodicity Search in XMM data of RX J0007.0+7302 circle(00:07:02.077,+73:03:09.92,15") From PSF, I reserve the photons in the energy region [0.2-12]kev Finally, I get 2264 counts. According to the article (ApJ., 601, 2004 Feb. 1), we choose the circle(00:07:02.203,+73:03:07.20,9.6") and filter in the same energy region. Finally, I get 1106 counts.

Intriguing Features of XMM data

Intriguing Features of XMM data

Intriguing Features of XMM data

Intriguing Features of XMM data

Intriguing Features of XMM data

Intriguing Features of XMM data

Periodicity Search in ASCA data of RX J0007.0+7302 circle(00:07:10.236,+73:02:51.44,90") circle(00:07:10.236,+73:02:51.44,180") After filtering the region, 387(1329)counts is gotten from Gis2 data

Periodicity Search in ASCA data of RX J0007.0+7302 circle(00:07:10.236,+73:02:51.44,90") circle(00:07:10.236,+73:02:51.44,180") After filtering the region, 474(1562)counts is gotten from Gis3 data

Filter channel on GIS2 data of 90’’ According to the article (ApJ., 485, 1997 Aug. 10, Slane et. al) and the above picture, I reserve the photons in the energy region [0.5-10]kev {channel:[11-213]}. Finally, I get 377 counts.

Filter channel on GIS2 data of 180’’ I reserve the photons in the same energy region [0.5-10]kev {channel:[11-213]}. Finally, I get 1296 counts.

Filter channel on GIS3 data of 90’’ I reserve the photons in the same energy region [0.5-10]kev {channel:[11-213]}. Finally, I get 466 counts.

Filter channel on GIS3 data of 180’’ I reserve the photons in the same energy region [0.5-10]kev {channel:[11-213]}. Finally, I get 1532 counts.

╮(╯_╰)╭ This is Lupin!! Intriguing Features of ASCA data 下次再說吧! 今天不告訴你!!

Future Plan Some EGRET unidentified sources have been reported to have probable X-ray counterparts. Periodicities in the X-ray data of those sources, if found, may help to strengthen the identification and to reveal their nature. We will perform a detailed search of periodicity in the X-ray observation data of possible pulsar candidates, which has the counterparts to Gamma -ray sources , with the H-test and the method of epoch folding. Maybe our work can give a direct evidence in multifrequency studies and open a window to study Geminga-like pulsars.