ROSAT X-ray Images of Supernova Remnants in the Magellanic Clouds

Eilat Glikman and John P. Hughes, Rutgers University

Based on work done by Eilat Glikman, while a senior at Rutgers University under the direction of John P. Hughes. All data were extracted from the ROSAT archive at the NASA/GSFC HEASARC and analyzed using IRAF/PROS. Both the High Resolution Imager (HRI) and Position Sensitive Proportional Counter (PSPC) data were analyzed, although PSPC images are not presented for the smaller, brighter remnants that are effectively unresolved by this instrument. Multiple pointings were merged and the raw count data were adaptively smoothed. For the brighter remnants a small number of iterations of Lucy-Richardson (LR) deconvolution were performed. Count rates exclude known point source contributions, as noted. Positions correspond to the "mean" of the X-ray emission, except where noted. In the accompanying images "dynamic range" is the ratio of the minimum to maximum contour values, the plus sign indicates the quoted position of the remnant, and the circle in the right hand side panel shows the effective spatial resolution.

Contour and grayscale levels were chosen in an objective manner. The background level was taken to be the mode of the pixel values in the adaptively-smoothed image and the error on the background was taken from the width of the pixel count distribution about the mode. The minimum contour level plotted is 3-sigma above background and there are five other contour levels plotted in equal linear intervals between the minimum and the peak. The grayscale is plotted from the background level to the peak value.

Please refer to this work as Glikman E. & Hughes, J.P. 2002, 'A Catalog of ROSAT X-ray Images of Magellanic Cloud Supernova Remnants,' Department of Physics and Astronomy, Rutgers University (available on the World-Wide-Web at "http://www.physics.rutgers.edu/~jackph/science/MCSNRs_atlas.html").

SMALL MAGELLANIC CLOUD SUPERNOVA REMNANTS
				HRI		PSPC
SNR Catalog Name	Other Catalog Name	R.A. (J2000)	Dec. (J2000)	Livetime (s)	Rate (s^-1)	Livetime (s)	Hard Band Rate (s^-1)	Broad Band Rate (s^-1)
B0039-73.9	DEMS5	00:40:54	-73:36:24	...	...	17500	0.010+/-0.001	0.012+/-0.001
B0044-73.4	...	00:46:38	-73:08:10	11853	< 0.016	18622	0.016+/-0.001	0.019+/-0.001
B0045-73.4	...	00:47:34	-73:09:04	11853	0.014+/-0.003	18622	0.036+/-0.002	0.036+/-0.002
B0046-73.5	...	00:48:24	-73:19:16	33301	< 0.0028	40240	0.0044+/-0.0004	0.0043+/-0.0005
B0047-73.5	...	00:49:03	-73:14:38	11853	0.009+/-0.002	21168	0.017+/-0.001	0.018+/-0.001
B0049-73.6	...	00:51:08	-73:21:33	28236	0.041+/-0.002	23643	0.104+/-0.002	0.124+/-0.002
B0050-72.8	...	00:52:31	-72:37:32	19125	< 0.011	17104	0.005+/-0.001	0.006+/-0.002
B0056-72.5	...	00:58:16	-72:18:06	54067	0.0020+/-0.0004	25268	0.0041+/-0.0005	0.0047+/-0.0006
B0058-71.8	...	01:00:30	-71:32:54	...	...	29610	0.0085+/-0.0007	0.009+/-0.001
B0101-72.4	...	01:03:17	-72:09:41	13885	< 0.013^a	25000	0.0018+/-0.0005^a	0.0014+/-0.0006^a
B0102-72.3	...	01:04:02	-72:01:53	21558	0.876+/-0.006	25000	1.825+/-0.009	1.980+/-0.009
B0103-72.6	...	01:05:04	-72:23:12	30650	0.124+/-0.003	29947	0.225+/-0.003	0.293+/-0.003
B0104-72.3	...	01:06:16	-72:05:34	21558	0.011+/-0.001	20240	0.030+/-0.001	0.032+/-0.001

^a Count rate excludes known point source

SMC SNR 0039-73.9 (Filipovic et al. 1998)

Adaptive Smoothing: signal-to-noise ratio per pixel of 6


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.001859 cts s^-1 arcmin^-2	Minimum: 0.001286 cts s^-1 arcmin^-2
	Increment: 0.000676 cts s^-1 arcmin^-2	Peak: 0.005913 cts s^-1 arcmin^-2

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SMC SNR 0044-73.4 (Kahabka et al. 1999)

Adaptive Smoothing: signal-to-noise ratio per pixel of 7

Caveat! Not a significant detection


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.006347 cts s^-1 arcmin^-2	Minimum: 0.004555 cts s^-1 arcmin^-2
	Increment: 0.000091 cts s^-1 arcmin^-2	Peak: 0.006924 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.002586 cts s^-1 arcmin^-2	Minimum: 0.001510 cts s^-1 arcmin^-2
	Increment: 0.00105 cts s^-1 arcmin^-2	Peak: 0.008880 cts s^-1 arcmin^-2

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SMC SNR 0045-73.4 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.007289 cts s^-1 arcmin^-2	Minimum: 0.005467 cts s^-1 arcmin^-2
	Increment: 0.001731 cts s^-1 arcmin^-2	Peak: 0.01765 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.002416 cts s^-1 arcmin^-2	Minimum: 0.001329 cts s^-1 arcmin^-2
	Increment: 0.003483 cts s^-1 arcmin^-2	Peak: 0.02332 cts s^-1 arcmin^-2

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SMC SNR 0046-73.5 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 7

Caveat! Not a significant detection


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.00704 cts s^-1 arcmin^-2	Minimum: 0.00574 cts s^-1 arcmin^-2
	Increment: 0.000175 cts s^-1 arcmin^-2	Peak: 0.00809 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.001978 cts s^-1 arcmin^-2	Minimum: 0.00123 cts s^-1 arcmin^-2
	Increment: 0.000565 cts s^-1 arcmin^-2	Peak: 0.005368 cts s^-1 arcmin^-2

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SMC SNR 0047-73.5 (Mathewson et al. 1984)

Adaptive Smoothing: signal-to-noise ratio per pixel of 8


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.005847 cts s^-1 arcmin^-2	Minimum: 0.004556 cts s^-1 arcmin^-2
	Increment: 0.000639 cts s^-1 arcmin^-2	Peak: 0.00968 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 4


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.002414 cts s^-1 arcmin^-2	Minimum: 0.001353 cts s^-1 arcmin^-2
	Increment: 0.002553 cts s^-1 arcmin^-2	Peak: 0.01774 cts s^-1 arcmin^-2

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SMC SNR 0049-73.6 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 6


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.007395 cts s^-1 arcmin^-2	Minimum: 0.004845 cts s^-1 arcmin^-2
	Increment: 0.007357 cts s^-1 arcmin^-2	Peak: 0.05155 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.002141 cts s^-1 arcmin^-2	Minimum: 0.001523 cts s^-1 arcmin^-2
	Increment: 0.01022 cts s^-1 arcmin^-2	Peak: 0.06349 cts s^-1 arcmin^-2

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SMC SNR 0050-72.8 (Mathewson et al. 1984)

Adaptive Smoothing: signal-to-noise ratio per pixel of 8

Caveat! Not a significant detection


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.00621 cts s^-1 arcmin^-2	Minimum: 0.004706 cts s^-1 arcmin^-2
	Increment: 0.000207 cts s^-1 arcmin^-2	Peak: 0.00749 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.001907 cts s^-1 arcmin^-2	Minimum: 0.001315 cts s^-1 arcmin^-2
	Increment: 0.000713 cts s^-1 arcmin^-2	Peak: 0.006187 cts s^-1 arcmin^-2

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SMC SNR 0056-72.5 (Mathewson et al. 1984)

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.006539 cts s^-1 arcmin^-2	Minimum: 0.003995 cts s^-1 arcmin^-2
	Increment: 0.00628 cts s^-1 arcmin^-2	Peak: 0.02265 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 7


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.003473 cts s^-1 arcmin^-2	Minimum: 0.002226 cts s^-1 arcmin^-2
	Increment: 0.002248 cts s^-1 arcmin^-2	Peak: 0.01696 cts s^-1 arcmin^-2

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SMC SNR 0058-71.8 (Mathewson et al. 1984)

Adaptive Smoothing: signal-to-noise ratio per pixel of 6


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.00247 cts s^-1 arcmin^-2	Minimum: 0.001378 cts s^-1 arcmin^-2
	Increment: 0.000448 cts s^-1 arcmin^-2	Peak: 0.05159 cts s^-1 arcmin^-2

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SMC SNR 0101-72.4 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 4

X-ray point source was identified with an m_V = 14.8 Be star, see Hughes & Smith 1994, AJ, 107 1363.

BeppoSax detected X-ray pulsations at 345.2 s (IAUC 6999)

No significant detection of diffuse X-ray emission from the remnant.


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.009075 cts s^-1 arcmin^-2	Minimum: 0.005704 cts s^-1 arcmin^-2
	Increment: 0.0137 cts s^-1 arcmin^-2	Peak: 0.09108 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 5


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.002943 cts s^-1 arcmin^-2	Minimum: 0.0018 cts s^-1 arcmin^-2
	Increment: 0.005278 cts s^-1 arcmin^-2	Peak: 0.03461 cts s^-1 arcmin^-2

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SMC SNR 0102-72.3 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 3

Deconvolved using the LR algorithm for 3 iterations


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.06011 cts s^-1 arcmin^-2	Minimum: 0.006011 cts s^-1 arcmin^-2
	Increment: 0.9766 cts s^-1 arcmin^-2	Peak: 5.856 cts s^-1 arcmin^-2

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SMC SNR 0103-72.6 (Mathewson et al. 1983)

Adaptive Smoothing: signal-to-noise ratio per pixel of 7


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.007341 cts s^-1 arcmin^-2	Minimum: 0.005139 cts s^-1 arcmin^-2
	Increment: 0.007586 cts s^-1 arcmin^-2	Peak: 0.05286 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 6


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.002449 cts s^-1 arcmin^-2	Minimum: 0.001653 cts s^-1 arcmin^-2
	Increment: 0.01592 cts s^-1 arcmin^-2	Peak: 0.09797 cts s^-1 arcmin^-2

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SMC SNR 0104-72.3 (Mathewson et al. 1984)

Adaptive Smoothing: signal-to-noise ratio per pixel of 4

X-ray point source toward south was identified with an m_V = 16.7 Be star, see Hughes & Smith 1994, AJ, 107 1363.


	Contours: Linear spacing	Grayscale: Linear mapping
	Minimum: 0.009352 cts s^-1 arcmin^-2	Minimum: 0.005477 cts s^-1 arcmin^-2
	Increment: 0.004141 cts s^-1 arcmin^-2	Peak: 0.03405 cts s^-1 arcmin^-2

Adaptive Smoothing: signal-to-noise ratio per pixel of 6


	Contours: Linear spacing	Grayscale: Square-root mapping
	Minimum: 0.002112 cts s^-1 arcmin^-2	Minimum: 0.001334 cts s^-1 arcmin^-2
	Increment: 0.003435 cts s^-1 arcmin^-2	Peak: 0.02502 cts s^-1 arcmin^-2

Return to table

Revised September 10, 2002

Please send any comments on this page to Jack Hughes, jph@physics.rutgers.edu.