CHANDRA and XMM-Newton Observations of Planetary Nebulae

Name Common Name X-ray
Observatory		 Count Ratea
(cnts s-1)		 X-ray Size
(arcsec)		 Fluxb
(ergs cm-2 s-1)
BD+30°3639 Campbell's Star Chandra 0.242±0.004 5"×4" 6.8×10−13
CRL 618 Westbrook Nebula Chandra <0.00025 ... <8.3×10−16
CRL 2688 Egg Nebula Chandra <0.0013 ... <4.4×10−16
Hen 2-90 ... Chandra <0.0010 ... <3.4×10−15
Hen 2-99 ... Chandra <0.00076 ... <3.0×10−15
Hen 2-104c Southern Crab Chandra <0.00058 ... <2.0×10−15
Central Star 0.0022±0.0004 Point Source 7.0×10−15
Hen 3-1475 ... Chandra 0.0017±0.0003 Point Source 5.1×10−15
K 1-16c ... Chandra 0.0007±0.00015d Point Source ...
M 1-16 ... Chandra <0.0010 ... <3.6×10−15
M 2-9 Butterfly Nebula Chandra <0.0017 ... <5.9×10−15
MyCn 18e Engraved Hourglass Nebula Chandra <0.0004 ... <1.4×10−15
Mz 3c Ant Nebula Chandra 0.0022±0.0003 33''×15'' 7×10−15
NGC 40 ... Chandra 0.0029±0.0008 35''×35'' 1.7×10−14
NGC 246c ... Chandra <0.011 ... <...
NGC 2346 ... XMM-Newton <0.0045 ... <5×10−15
NGC 2392 Eskimo Nebula XMM-Newton 0.0534±0.0026 6×10−14
NGC 3242 Ghost of Jupiter Nebula XMM-Newton 0.0384±0.0021 12''×8'' 6.7×10−14
NGC 4361c ... Chandra <0.0009 ... <4.2×10−15
NGC 6543c Cat's Eye Nebula Chandra 0.0316±0.0009 18''×8'' 1.0×10−13
NGC 7009 Saturn Nebula XMM-Newton 0.0615±0.0017 23''×14'' 7.2×10−14
NGC 7026 ... XMM-Newton 0.0083±0.0011 45''×25'' 8.8×10−15
NGC 7027 ... Chandra 0.015±0.001 11''×7'' 3.1×10−14
NGC 7293 Helix Nebula Chandra <0.020 ... <1.0×10−13
Central Star 0.0429±0.0012 Point Source 1.1×10−13
OH 231.8+4.2 Calabash Nebula Chandra <0.00054 ... <2.4×10−15
a For XMM-Newton observations, the count rate corresponds to the EPIC/pn instrument.
b Absorbed (observed) flux in the energy range 0.25-2.5 keV from the best-fit model. When only an upper limit is available, a Raymond-Smith model with temperature of 0.2 keV has been assumed.
c Hard X-ray emission (>0.5 keV) is detected at the position of the central star.
d Count rate and flux in the energy range 0.15-2.5 keV.
e There is a 2-sigma detection (0.00015 cnts s−1) of a star overimposed on the nebula. Check astrometry.

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