Multiwavelength campaign on Mrk 509 - IV. Optical-UV-X-ray variability and the nature of the soft X-ray excess

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Table 3

Best-fit parameters of the broad and narrow emission features in the mean OM optical grism spectrum. The (302 d.o.f.).

Emission	Energy flux^a	FWHM ^b

Hαλ6563	44 ± 2	4300 ± 200
Hβλ4861	17.0 ± 0.5	4400 ± 200
Hγλ4340	9.0 ± 0.3	4400 ± 200
Hδλ4101	4.2 ± 0.3	3700 ± 300
[O iii] λ4959	2.2 ± 0.3	1100 ± 200
[O iii] λ5007	7.8 ± 0.3	1500 ± 200
“small-blue-bump”^c	44 ± 5	–

Notes.

^(a)

10^-13 erg s^-1 cm^-2.

^(b)

km s^-1.

^(c)

Calculated between 2900 and 3700 Å rest-wavelength.

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