#The spectral radiance of the 260 nm radiance standard
#The radiance standard has two integrating spheres with a micrometer slit at their junction, therefore its radiance is controlled by the slit position (width) and proportional to the junction area.
#The spectral radiance of the 260 nm radiance standard at the highest output (fully open micrometer slit) has been measured at the PTD Spectral Radiance Comparator Facility.
#The integrating sphere-based spectral radiance transfer standard was used to transfer the quantity of spectral radiance from the high photon flux black-body irradiator to the low photon flux radiance standard.
#
#Location: PTB Berlin
#Detector: BN-0102-1 integrating sphere-based spectral radiance transfer standard S/N2198M with 10W tungsten halogen lamp (1.59 A current)
#Atmosphere: air (NTP)
#Radiance standard output port diameter: 25.68 mm
#
#Column 1: Wavelength (nm)
#Column 2: Spectral radiance (1/[s nm m2 sr]), reading UV photons at particular wavelength (nm) emitted per unit time (second) per unit source area (meter squared) and propagated in the unit solid angle (steradian)
#Column 3: Uncertainty of the spectral radiance (1/[s nm m2 sr]) given with the coverage factor k=1
#
250, 7.602e07, 6.006e07
251, 1.893e07, 7.193e07
252, 4.375e07, 5.688e07
253, 1.990e08, 1.095e08
254, 2.777e08, 5.276e07
255, 4.180e08, 5.852e07
256, 6.055e08, 6.055e07
257, 8.299e08, 7.718e07
258, 1.229e09, 8.603e07
259, 1.431e09, 1.231e08
260, 1.945e09, 1.070e08
261, 2.312e09, 1.156e08
262, 2.638e09, 1.372e08
263, 2.921e09, 1.314e08
264, 2.930e09, 1.553e08
265, 2.740e09, 1.589e08
266, 2.512e09, 1.532e08
267, 2.392e09, 1.746e08
268, 2.300e09, 2.024e08
269, 1.902e09, 1.845e08
270, 1.506e09, 1.657e08
271, 1.240e09, 1.984e08
272, 1.409e09, 2.818e08
273, 9.553e08, 2.866e08
274, 1.147e09, 3.097e08
275, 8.304e08, 3.737e08
276, 1.201e09, 3.243e08
277, 6.969e08, 3.275e08
278, 1.752e08, 3.329e08
279, 7.355e08, 8.091e08
280, 5.824e07, 4.426e08
