X-ray Hardness

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

Hardness Ratios for M81*, Obsid 6892

Aimpoint HR₁ = (H-M)/(H+M) HR₂ = (M-S)/(M+S) HR₃ = (H-S)/(H+S)
ACIS-S 0.077 0.159 0.233
ACIS-I 0.128 0.407 0.508

Quantiles for M81*, Obsid 6892

Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 0.898 0.007 1.321 0.008 1.949 0.012

Q-norm 0.078 0.001 0.133 0.001 0.214 0.002
ACIS-I keV 1.059 0.007 1.467 0.008 2.183 0.023

Q-norm 0.099 0.001 0.152 0.001 0.245 0.003

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Hardness Ratios for M81*, Obsid 6892
Aimpoint	HR₁ = (H-M)/(H+M)	HR₂ = (M-S)/(M+S)	HR₃ = (H-S)/(H+S)
ACIS-S	0.077	0.159	0.233
ACIS-I	0.128	0.407	0.508

Quantiles for M81*, Obsid 6892
Aimpoint	Quantiles	25 %	25 % Error	50 %	50 % Error	75 %	75 % Error
ACIS-S	keV	0.898	0.007	1.321	0.008	1.949	0.012
ACIS-S	Q-norm	0.078	0.001	0.133	0.001	0.214	0.002
ACIS-I	keV	1.059	0.007	1.467	0.008	2.183	0.023
ACIS-I	Q-norm	0.099	0.001	0.152	0.001	0.245	0.003