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Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 1 Studying extended sources with JEM-X Niels Lund Danish National Space Center.

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Presentation on theme: "Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 1 Studying extended sources with JEM-X Niels Lund Danish National Space Center."— Presentation transcript:

1 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 1 Studying extended sources with JEM-X Niels Lund Danish National Space Center

2 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 2 ASCA and JEM-X images of SN 1006 JEM-X 3-4 keV JEM-X 4-8 keV ASCA 0.4-8 keV

3 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 3 JEM-X imaging of extended sources Coma cluster 3 to 4 keV 4 to 8 keV

4 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 4 Exciting JEM-X images of NGC 1275 ! 3-4 keV 4-8 keV 8-14 keV 14-35 keV JEM-X psf (GRS1915+105) BUT...

5 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 5.. there were problems.. The JEM-X image of the X-ray halo of NGC 1275 did not match with what was observed with XMM. White: XMM 2-7 keV Green: JEM-X 4-8 keV

6 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 6 The origin of the ”Perseus problem” 1)The Perseus observation was done in staring mode, therefore all the image artefacts appear with full power in the final image. Most other observations are done using dithering and then the artefacts are spread over the image. 2)At the higher energies the JEM-X shadowgrams have a bright rim, and when making the first Perseus images we were not not sufficiently conservative when selecting data.

7 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 7... the final data selection for Perseus:

8 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 8 Final Perseus images 3-4 keV 4-8 keV 8-14 keV 14-35 keV JEM-X psf (GRS1915+105)

9 Extended sources with JEM-X, ESTEC| 21. januar 2005 | Ref | side 9... the final data selection for Perseus: But we still have many shadowgram features which have not been accounted for in our analyses. The work continues...


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