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

2. 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.

3. 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

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

5. 4 γ-ray Sources 1. 3EG J1835+5918/RX J1836.2+5925
4. GEV J /AX J
Reference: Reimer et. c
MNRAS, 324: , 2001

6. About RX J0007.0+7302 At the center of SNR CTA 1
Right Ascension:
Declination:
Size (/arcmin): 90? (~107 ׳)
Flux density at 1 GHz (/Jy): 36
Spectral Index: 0.6
Kinematic distance: kpc
Another name : G ; 2EG J (?);
GRO J ; RX J
At the center of SNR CTA 1
Image of the observation
Reference: Slane et. c
ApJ, 601: , 2004 Feb.

7. About RX J
No radio counterpart to RX J is identified in a
list of compact sources by Pineault et al.(1993)
List of observation data:
Date PI offset exposure time (s)
$ ASCA /1/25 Slane CTA1_center (Gis)
41264(Sis)
$Chandra 2003/4/13 Halpern RX J k(Acis-S)
2004/4/13 Murray WGA J000702_ k(HRC-I)
$ROSAT 1996/12/31 Seward CTA1_center (PSPCB)
CTA1_south (PSPCB)
CTA1_EAST (PSPCB)
1997/2/ E (HRI)
1225(HRI)
$XMM /2/21 Slane CTA

8. About RX J
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: , 2004 Feb.

9. 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.

10. 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 ( )
Japan’s 4th cosmic X-ray astronomy mission.
Energy range: keV.
First satellite to use CCD detector for X-ray astronomy.
PI:Japan/US
Catalog: AX hhmm.m ±ddmm (e.g. AX J )

11. 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

13. Basic characteristics of ASCA
Lifetime : February 20, March 2, 2001
Four X-ray telescopes
(1) Gas Imaging Spectrometer (GIS; keV)
(2) Solid-state Imaging Spectrometer (SIS; 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 or 12
Fast mode -- 03
Time resolution of each mode??

14. 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.

15. Intriguing Features of XMM data

16. Intriguing Features of XMM data

17. Intriguing Features of XMM data

18. Intriguing Features of XMM data

19. Intriguing Features of XMM data

20. Intriguing Features of XMM data

21. 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

22. 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

23. 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.

24. 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.

25. 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.

26. 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.

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

28. 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.