If you know the intrinsic brightness of such a supernova, then its apparent brightness as seen in a telescope tells you its distance from Earth fairly precisely.
A brightness normalization such as that described in [40] (also called the hyperspherical directional cosine transformation [41]) was also applied in order to eliminate linear illumination geometry effects.
Because of the sun's overpowering brightness, such a deviation cannot normally be observed.
Though consistent with the hypothesis that V1 encodes brightness, such a conclusion is tempered by the fact that the test stimuli used also varied in physical contrast.
We cannot therefore entirely rule out the possibility that such a close correspondence between brightness of chromatic stimuli and V1 activity represents a coincidentally identical response to two different hue-luminance response functions.
Specifically, researchers disagree about whether the low-level visual salience of objects in a scene, such as brightness (e.g., Lansdale, Underwood, & Davies, 2010; Pringle, Irwin, Kramer, & Atchley, 2001; Spotorno & Faure, 2011) or the high-level semantic meaning of the scene (Stirk & Underwood, 2007) has the most influence on attentional allocation.
Previous studies of criterion effects in classification tasks (Healy & Kubovy, 1981; Lee & Janke, 1964, 1965) have not used natural criteria but arbitrary points along a continuum such as brightness, and thus are not relevant to the question we pose here.
The brightness of such a star remains constant until the star suddenly dims by several magnitudes and then slowly recovers its original brightness.
The brightness in such a device configuration is 4030 cd/m2 at 9 V with CIE coordinates of (0.32, 0.34).
The data are consistent with EphA2FL-GFP as a monomer, but making such a conclusion based on molecular brightness is not straightforward.
