X-ray Hardness

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

Hardness Ratios for VELA X-1, Obsid 1926

Aimpoint HR₁ = (H-M)/(H+M) HR₂ = (M-S)/(M+S) HR₃ = (H-S)/(H+S)
ACIS-S 0.501 0.578 0.836
ACIS-I 0.561 0.692 0.903

Quantiles for VELA X-1, Obsid 1926

Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 1.380 0.006 2.373 0.014 4.636 0.020

Q-norm 0.140 0.001 0.269 0.002 0.563 0.003
ACIS-I keV 1.511 0.009 2.840 0.027 5.117 0.020

Q-norm 0.157 0.001 0.330 0.004 0.626 0.003

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Hardness Ratios for VELA X-1, Obsid 1926
Aimpoint	HR₁ = (H-M)/(H+M)	HR₂ = (M-S)/(M+S)	HR₃ = (H-S)/(H+S)
ACIS-S	0.501	0.578	0.836
ACIS-I	0.561	0.692	0.903

Quantiles for VELA X-1, Obsid 1926
Aimpoint	Quantiles	25 %	25 % Error	50 %	50 % Error	75 %	75 % Error
ACIS-S	keV	1.380	0.006	2.373	0.014	4.636	0.020
ACIS-S	Q-norm	0.140	0.001	0.269	0.002	0.563	0.003
ACIS-I	keV	1.511	0.009	2.840	0.027	5.117	0.020
ACIS-I	Q-norm	0.157	0.001	0.330	0.004	0.626	0.003