Update astrometry configs for LATISS

Now that the pointing accruacy and stability has improved for AutTel,
the bbox padding for reference catalog loading can be greatly reduced.
This has the benefit of avoiding many very bad fits where the matcher
locked onto sources way outside of the true field for the exposure.

config/latiss/calibrate.py

@@ -11,18 +11,21 @@
 # of up to 4 arcmin, which translates to 2400pix. We choose 3000 as a conservative limit. pixelMargin 
 # also increased to ensure refcat overlap when we see large pointing offsets considering a 3000pix 
 # offset and detector half-width of 2100pix. 
-config.astromRefObjLoader.pixelMargin = 900
-config.astrometry.matcher.maxOffsetPix = 3000
+config.astromRefObjLoader.pixelMargin = 250
+config.astrometry.matcher.maxOffsetPix = 900
 
 # Apply a magnitude limit and decrease the SNR limit as we're only a 1.2m
 # and frequently take short exposures. Also, allow max rotation while the
 # instrumental repeatability isn't good.
 config.astrometry.referenceSelector.doMagLimit = True
-config.astrometry.referenceSelector.magLimit.minimum = 1
+config.astrometry.referenceSelector.magLimit.minimum = 8
 config.astrometry.referenceSelector.magLimit.maximum = 18
 config.astrometry.referenceSelector.magLimit.fluxField = "phot_g_mean_flux"
-config.astrometry.matcher.maxRotationDeg = 5.99
+config.astrometry.matcher.maxRotationDeg = 2.0
+
 config.astrometry.sourceSelector['matcher'].minSnr = 10
 
+config.astrometry.doMagnitudeOutlierRejection = True
+
 # Write srcMatchFull
 config.doWriteMatchesDenormalized = True