# Radio Recombination Lines of H, He, C, N, O, S # GBT REU Summer Observing Project # Daniel Lacasse, Tim Pennucci, Charli Sakari, Colin Slater # June 25/26th, 2008 # Script adapted from example scripts by Frank Ghigo (GBT Wiki), Jim Braatz, and Jeff Mangum c = Catalog("[path]/recomb.cat") #Catalog for NGC 7027 and DR 21 source = "NGC7027" #source = "DR21" Comment("Configuring...Total Power ACS for X-Band, 4 spectral windows each with 50 Mhz bandwidth...") Execfile("[path]/recomb.init") #Offset for on/off hoff = Offset("J2000", "00:04:00", 0, cosv=False) #One degree offset in RA...large enough? maybe should offset in a different direction? #Why not use OnOffSameHA? print source, c[source]["RA"], c[source]["DEC"], c[source]["VELOCITY"] Comment("Go-Go gadget GBT...slewing...") Slew(source) Balance() Break("Check IF Rack power levels and Spectrometer duty cycles...Balance ok?") #Should we obtain measurements for flux density calibration? #Do an OnOff scan, then an OffOn, 60 sec subscan duration... #OnOffSameHA? OnOff(source, hoff, 60) OffOn(source, hoff, 60) Comment("Scans complete.")