Changeset 14817 for trunk/ppSim/src/ppSimMakeStars.c

Timestamp:

Sep 11, 2007, 1:18:48 PM (19 years ago)

Author:

Paul Price

Message:

Was using the sigma instead of FWHM.

File:

• trunk/ppSim/src/ppSimMakeStars.c (modified) (2 diffs)

trunk/ppSim/src/ppSimMakeStars.c

@@ -1 +1 @@
 # include "ppSim.h"
 
-#define FAINT_FUDGE_FACTOR   1.0        // Fraction of the noise in a (boxcar) PSF for the faint limit
+#define FAINT_FUDGE_FACTOR   0.4        // Fraction of the noise in a (boxcar) PSF for the faint limit
 
 
@@ -46 +46 @@
     // Faintest and brightest (integrated) fluxes (actually fluence, since integrated) for random stars
     float faint = FAINT_FUDGE_FACTOR * sqrtf(PS_SQR(readnoise) + (darkRate + skyRate) * expTime) *
-        seeing; // Faint limit is related to the noise in a (boxcar) PSF
+        (2.0 * sqrt(2.0 * log(2.0)) * seeing); // Faint limit is related to the noise in a (boxcar) PSF
     float bright = powf(10.0, -0.4 * (starsMag - zp)) * expTime; // Bright limit is specified by user as mag
     psTrace("ppSim", 6, "Faint limit: %f\n", faint);