Is there any information which explains the jargon used in the photometry of objects in NED?
A.: As with the redshifts, we encourage you to go back to the original paper to fully understand the magnitudes adopted by NED. Here are a few examples of magnitudes currently found in NED’s detailed photometric data: • u, g, r, i, or z usually refers to the five-band SDSS photometric system • B is a B-band magnitude on the Johnson system • BT is a total magnitude in the B-band • BT0 is a total magnitude in the B-band corrected to “face-on” (i.e.