CHANDRA OBSERVATIONS OF SN 1987A: THE SOFT X-RAY LIGHT CURVE REVISITED
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Helder-2013-CHANDRA OBSERVATIONS.pdf
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Author(s)
Helder, E. A.
Broos, P. S.
Dewey, Dan
Dwek, E.
McCray, Richard
Park, S.
Racusin, J. L.
Zhekov, S. A.
Burrows, David N.
Date Issued
February 2013
Journal
Astrophysical Journal
Publisher
Institute of Physics/American Astronomical Society
Citation
Helder, E. A., P. S. Broos, D. Dewey, E. Dwek, R. McCray, S. Park, J. L. Racusin, S. A. Zhekov, and D. N. Burrows. “ CHANDRA OBSERVATIONS OF SN 1987A: THE SOFT X-RAY LIGHT CURVE REVISITED .” The Astrophysical Journal 764, no. 1 (January 21, 2013): 11. © 2013 American Astronomical Society.
Version
Final published version
Abstract
We report on the present stage of SN 1987A as observed by the Chandra X-Ray Observatory. We reanalyze published Chandra observations and add three more epochs of Chandra data to get a consistent picture of the evolution of the X-ray fluxes in several energy bands. We discuss the implications of several calibration issues for Chandra data. Using the most recent Chandra calibration files, we find that the 0.5-2.0 keV band fluxes of SN 1987A have increased by ~6 × 10[superscript –13] erg s[superscript –1[ cm[superscript –2] per year since 2009. This is in contrast with our previous result that the 0.5-2.0 keV light curve showed a sudden flattening in 2009. Based on our new analysis, we conclude that the forward shock is still in full interaction with the equatorial ring.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1088/0004-637x/764/1/11
