! Start file bw099.key. Example of a VLBI observation using the ! VLA as a phased array. ! Original file by J. Wrobel. ! Modified for the SCHED manual by C. Walker. ! VLAINTEG added Sep. 8, 2008 RCW. ! ! ========================================================== ! ================= Cover Information ==================== ! ========================================================== expt = 'bw099 1cm 15jan97 Wrobel' expcode = 'bw099' version = 1 piname = 'J.M. Wrobel' address1 = 'NRAO, P.O. Box O' address2 = 'Socorro, NM 87801' address3 = 'USA' phone = '+1-505-835-7392' obsphone = 'VLA' fax = '+1-505-835-7027' email = 'jwrobel@nrao.edu (internet)' obsmode = '128-4-2' obstype = 'VLBA' note1 = 'VLBA target : J1220+29=NGC4278=UGC07386 ***' note2 = 'VLBA DR check/VLA phase ref: J1221+28 ***' note3 = 'VLBA FF/manual pcal/bpass : J1229+02=3C273 ***' note4 = 'VLBA amp check, VLA amp std: J1310+32, J1331+30=3C286 ***' ! ========================================================== ! ============== Correlator Information ================== ! ========================================================== correl = 'socorro' cornant = 11 corchan = 16 coravg = 2 corpol = 'on' corwtfn = 'uniform' corsrcs = 'NGC4278 from schedule, else standard' cortape = 'dat' corship1 = 'jwrobel at aoc' ! ========================================================== ! ==================== Source Catalog ===================== ! ========================================================== ! Imbedded catalog for possible non-standard source. srccat / source='J1220+2916','J1220+29','B1217+295','NGC4278','UGC07386' ra=12:20:06.8243 dec= 29:16:50.716 equinox='J2000' calcode='M' remarks='From preliminary JVAS paper III' / endcat / ! standard catalogs ! These are the defaults - included to show format. srcfile = $SCHED/catalogs/sources.vlba stafile = $SCHED/catalogs/stations.dat ! ========================================================== ! ==================== Setup Information =================== ! ========================================================== ! This shows how to specify a full VLA setup when doing ! a frequency set unlike any in freq.dat. This is fairly ! common when trying to span more than the 50 MHz of a ! single VLA IF. Start SCHED and specify FREQLIST=, ! for lists of possible inputs. setinit = '1cmwide.set' / nchan = 4 bits = 2 bbfilter = 8.0 freqref = 22228.49 freqoff = -200.00, -192.00, +200.00, +208.00 netside = U, U, U, U pol = LCP / station = vla1, vla27 ifchan = C, C, D, D firstlo = 21410.10, 21410.10, 21810.10, 21810.10 vlaband = VK vlafeab = 17.5 vlasyna = 3510.1 flukea = 100.0 vlabw = '0000' vlafecd = 17.5 vlasynb = 3910.1 flukeb = 200.0 fefilter = '0000' / endset / ! ========================================================== ! ======================== The Scans ===================== ! ========================================================== year = 1997 month = 1 day = 15 start = 06:45:00 autotape = 2 stations = vlba_sc, vlba_hn, vlba_nl, vlba_fd, vlba_la, vla27, vlba_pt, vlba_kp, vlba_ov, vlba_br, vlba_mk ! Adopt 14 passes per tape and 44m per thin tape pass. ! Note that this sample was set up before automatic tape allocation ! was used. Keeping track of passes is no longer necessary, and ! can occasionally be counterproductive. ! Use the setup specified above. setup = '1cmwide.set' ! Point vla27 south to make wraps predictable. Assess phasing. ! Use vlamode 'VL' to phase IFs C and D, rather than the A and D ! normally used with mode 'VA'. source = 'J0725-00' gap = 00:00 dur = 12:00 vlamode 'VL' norecord / ! Swing vla27 to ngc4278's phase ref source. source = 'J1221+28' gap = 00:00 dur = 05:00 vlamode 'VL' norecord / ! Do passes 1-4. This is a sequence of calibrator/source pairs. group 2 repeat 16 source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' record / source = 'NGC4278' gap = 00:00 dur = 08:00 vlamode 'VX' record / ! Start pass 5. Get VLBI fringe finder and VLA flux calibrator. comment = '**** Start 1st calibration sequence.' ! vla27 mode VA is ok for J1310+32 but not for 3C273. ! vla27 mode VX for 3C286 to hold phases constant. source = 'J1224+03' gap = 00:00 dur = 04:00 vlamode 'VL' norecord / source = '3C273' gap = 00:00 dur = 05:30 vlamode 'VX' record / source = 'J1310+32' gap = 01:00 dur = 05:30 vlamode 'VL' record / source = '3C286' gap = 00:00 dur = 04:00 vlamode 'VX' norecord / comment = '**** End 1st calibration sequence.' ! Swing vla27 to ngc4278's phase ref source. source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' norecord / ! As a demonstration, change the on-line integration time to 3 sec. ! This might allow faster phasing. vlainteg = 3 ! Finish pass 5. group 2 repeat 3 source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' record / source = 'NGC4278' gap = 00:00 dur = 08:00 vlamode 'VX' record / ! Do passes 6-9. group 2 repeat 16 source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' record / source = 'NGC4278' gap = 00:00 dur = 08:00 vlamode 'VX' record / ! Start pass 10. comment = '**** Start 2nd calibration sequence.' source = 'J1224+03' gap = 00:00 dur = 04:00 vlamode 'VL' norecord / source = '3C273' gap = 00:00 dur = 05:30 vlamode 'VX' record / source = 'J1310+32' gap = 01:00 dur = 05:30 vlamode 'VL' record / source = '3C286' gap = 00:00 dur = 04:00 vlamode 'VX' norecord / comment = '**** End 2nd calibration sequence.' ! Swing vla27 to ngc4278's phase ref source. source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' norecord / ! Finish pass 10. group 2 repeat 3 source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' record / source = 'NGC4278' gap = 00:00 dur = 08:00 vlamode 'VX' record / ! Do passes 11-14. group 2 repeat 16 source = 'J1221+28' gap = 00:00 dur = 03:00 vlamode 'VL' record / source = 'NGC4278' gap = 00:00 dur = 08:00 vlamode 'VX' record / ! end bw099.key