X-ray Hardness

View complete listing of X-Atlas Spectral Metrics (Hardness, Quantiles).

Hardness Ratios for M81*, Obsid 6894

Aimpoint HR₁ = (H-M)/(H+M) HR₂ = (M-S)/(M+S) HR₃ = (H-S)/(H+S)
ACIS-S 0.049 0.151 0.199
ACIS-I 0.105 0.401 0.485

Quantiles for M81*, Obsid 6894

Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 0.898 0.006 1.278 0.007 1.949 0.012

Q-norm 0.078 0.001 0.127 0.001 0.214 0.002
ACIS-I keV 1.044 0.007 1.438 0.008 2.212 0.022

Q-norm 0.097 0.001 0.148 0.001 0.248 0.003

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Hardness Ratios for M81*, Obsid 6894
Aimpoint	HR₁ = (H-M)/(H+M)	HR₂ = (M-S)/(M+S)	HR₃ = (H-S)/(H+S)
ACIS-S	0.049	0.151	0.199
ACIS-I	0.105	0.401	0.485

Quantiles for M81*, Obsid 6894
Aimpoint	Quantiles	25 %	25 % Error	50 %	50 % Error	75 %	75 % Error
ACIS-S	keV	0.898	0.006	1.278	0.007	1.949	0.012
ACIS-S	Q-norm	0.078	0.001	0.127	0.001	0.214	0.002
ACIS-I	keV	1.044	0.007	1.438	0.008	2.212	0.022
ACIS-I	Q-norm	0.097	0.001	0.148	0.001	0.248	0.003