Tracked down a case in photon_intensity that I originally wrote off as an odd error. Instead, this arises when no photons have been detected, but the intensity is being flushed anyway.
Tracked down a case in photon_intensity that I originally wrote off as an odd error. Instead, this arises when no photons have been detected, but the intensity is being flushed anyway.

tsbischof/photon_correlation,tsbischof/photon_correlation,tsbischof/photon_correlation