X-ray Hardness

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

Hardness Ratios for M81*, Obsid 6893

Aimpoint HR₁ = (H-M)/(H+M) HR₂ = (M-S)/(M+S) HR₃ = (H-S)/(H+S)
ACIS-S 0.024 0.180 0.203
ACIS-I 0.074 0.443 0.500

Quantiles for M81*, Obsid 6893

Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 0.898 0.005 1.278 0.007 1.905 0.012

Q-norm 0.078 0.001 0.127 0.001 0.208 0.002
ACIS-I keV 1.044 0.006 1.424 0.007 2.139 0.024

Q-norm 0.097 0.001 0.146 0.001 0.239 0.003

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Hardness Ratios for M81*, Obsid 6893
Aimpoint	HR₁ = (H-M)/(H+M)	HR₂ = (M-S)/(M+S)	HR₃ = (H-S)/(H+S)
ACIS-S	0.024	0.180	0.203
ACIS-I	0.074	0.443	0.500

Quantiles for M81*, Obsid 6893
Aimpoint	Quantiles	25 %	25 % Error	50 %	50 % Error	75 %	75 % Error
ACIS-S	keV	0.898	0.005	1.278	0.007	1.905	0.012
ACIS-S	Q-norm	0.078	0.001	0.127	0.001	0.208	0.002
ACIS-I	keV	1.044	0.006	1.424	0.007	2.139	0.024
ACIS-I	Q-norm	0.097	0.001	0.146	0.001	0.239	0.003