SYSTEM: V2.9
NUMBER: 155 MODULE: apphot.radprof SYSTEM: V2.9 DATE: Mon Aug 26 11:25:36 MST 1991 FROM: davis BUG: 1. Radprof was computing the total intensity of the fitted radial profile by integrating (RP) instead of the physically meaningful quantity 2 * PI * (r * RP). 2. The computed total intensity (TINORM) was too small by a factor equal to the profile step size in pixels, although the shape of the curve was correct. STATUS: Both bugs have been fixed in 2.10. Bug 1 was fixed some time ago at the request of a user at ST, but was not previously logged. There is no workaround. Bug 2 was only recently discovered. The workaround is to multiply the quantity TINORM by the step size in pixels, and compare it to the aperture photometry results. The two numbers should be equal to within the expected errors.