Include Garth H's HGC gain constants

PARAM/SHMS/HGCER/phgcer.param

@@ -3,8 +3,10 @@ phgcer_tot_pmts = 4
 
 phgcer_width = 50, 50,50, 50
 
-phgcer_adc_to_npe = 1/8895., 1/5293.,1/8000., 1/10000.
+;phgcer_adc_to_npe = 1/128.8, 1/130.6,1/128.99, 1/128.99
 
+; Garth H. gain calibration from run 486, March 9 2017
+phgcer_adc_to_npe = 1/436., 1/393., 1/364., 1/372.
 
 phgcer_chi2max = 50.
 phgcer_beta_min = 0.8