This photograph was taken after registering low frequency magnetic fields upstairs. Investigators were separated into different rooms on both floors. This was the fourth picture taken downstairs after the initial EM readings were discovered.
Spectral analysis and band pass filters were applied to the images below.
The object in the photo appears to be composed of multiple frequencies of infrared light and blocks out a portion of the background. There is some possible interaction with the camera's flash causing the upper portion of the stairs to appear darker than the control shot (DSCF1413).
It may also be possible that the object was in motion, thus the difference in it's spectral wavelengths.
The object was not seen by the naked eye.