X-ray Hardness

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

Hardness Ratios for VELA X-1, Obsid 102

Aimpoint HR₁ = (H-M)/(H+M) HR₂ = (M-S)/(M+S) HR₃ = (H-S)/(H+S)
ACIS-S 0.603 0.802 0.947
ACIS-I 0.651 0.860 0.969

Quantiles for VELA X-1, Obsid 102

Aimpoint Quantiles 25 % 25 % Error 50 % 50 % Error 75 % 75 % Error
ACIS-S keV 1.657 0.019 3.146 0.040 5.198 0.037

Q-norm 0.176 0.003 0.370 0.005 0.636 0.005
ACIS-I keV 1.730 0.010 3.599 0.033 5.585 0.030

Q-norm 0.186 0.001 0.428 0.004 0.686 0.004

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Hardness Ratios for VELA X-1, Obsid 102
Aimpoint	HR₁ = (H-M)/(H+M)	HR₂ = (M-S)/(M+S)	HR₃ = (H-S)/(H+S)
ACIS-S	0.603	0.802	0.947
ACIS-I	0.651	0.860	0.969

Quantiles for VELA X-1, Obsid 102
Aimpoint	Quantiles	25 %	25 % Error	50 %	50 % Error	75 %	75 % Error
ACIS-S	keV	1.657	0.019	3.146	0.040	5.198	0.037
ACIS-S	Q-norm	0.176	0.003	0.370	0.005	0.636	0.005
ACIS-I	keV	1.730	0.010	3.599	0.033	5.585	0.030
ACIS-I	Q-norm	0.186	0.001	0.428	0.004	0.686	0.004