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a ds9 activity

Analysis of Two Pulsating X-Ray Sources. a ds9 activity. Hubble image -white dwarfs in a globular cluster. What is it?. And how do we know?. Cas A. Tycho’s SNR. And these are?. Cen X3. GK Per.

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a ds9 activity

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  1. Analysis of Two Pulsating X-Ray Sources a ds9 activity Hubble image -white dwarfs in a globular cluster

  2. What is it? And how do we know? Cas A

  3. Tycho’s SNR

  4. And these are? Cen X3 GK Per Go to Analysis>Virtual Observatory and check any of the servers. From the new window that appears, click Obs ID 1943 – THE WIND AND ACCRETION DISK IN CEN X-3/V779 CEN. Choose Frame>Tile Frames and Frame>New Frame Click the back button on the server window and click Obs ID 3454 -CHANDRA HETG SPECTROSCOPY OF GK PER IN OUTBURST

  5. Craft Schematic X-Ray Imaging and X-Ray Data: The Data Consists of: Energy Time of Arrival – discrete – usually 3.24s in duration Position

  6. Light Curves

  7. We can compare light curves of unknown objects to standard light curves made of objects such as: eclipsing binaries and supernovae.

  8. Historical Light Curves from the AAVSO

  9. Light Curves Regular or irregular variation?

  10. Making a light curve in ds9

  11. Zoom! Zoom in on an area on the graph by either left clicking and dragging a box around a region of the graph until you can determine if there appears to be a periodic x-ray pulse.

  12. Power Spectra Go to Analysis>Chandra Ed Analysis Tools>FTOOLS Power Spectrum and click OK. The power spectrum plots the likelihood that a frequency is present in the data (represented by "power" on the vertical axis) as a function of frequency (on the horizontal axis).

  13. Accreting white dwarf Hot spots! Accretion powered pulsar

  14. Find the period of rotation Zoom of Power Spectrum of GK Per 1 period = frequency Zoom of Power Spectrum of Cen X-3

  15. How fast can a star spin without blowing apart? Msun = 2.0 X 1030 kg Comparison of a White Dwarf Star and the Earth. Comparison of a Neutron Star and the Island of Manhattan.

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