COVER INFORMATION Station: YEBES40M (Code Ys ) Experiment: 6cm global VLBI observations of Arp220 Exp. Code: GV022B Schedule Version: 3.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Eskil Varenius Address: Department of Earth and Space Sciences, Chalmers University of T Onsala Space Observatory 439 92 Onsala Sweden Phone: +46 31 772 55 45 EMAIL: varenius@chalmers.se Fax: +46(0)31 772 5590 Phone during observation: +46 31 772 55 45 Observing mode: 6cm 2Gbps global VLBI with phased C-array VLA Notes: Phase calibrator: J1532+2344 Fringe finder / pol. cal / bandpass cal: J1516+1932 VLA phase-up calibrator: J1516+1932 Schedule for YEBES40M (Code Ys ) Page 2 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 7 Jun 2017 Day 158 --- ---------- pre-VLA block ---------- Next scan frequencies: 4772.25 4772.25 4772.25 4772.25 4836.25 4836.25 4836.25 4836.25 4900.25 4900.25 4900.25 4900.25 4964.25 4964.25 4964.25 4964.25 Next BBC frequencies: 614.25 614.25 614.25 614.25 678.25 678.25 678.25 678.25 742.25 742.25 742.25 742.25 806.25 806.25 806.25 806.25 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 21 00 00 J1516+1932 13 53 26 62.3 133.2 -1.4 -36.0 0 0 21 00 00 21 03 00 =1514+197 13 56 27 62.7 134.4 -1.4 -35.2 180 46 21 00 01 21 04 01 J1532+2344 13 57 28 63.7 122.6 -1.6 -44.4 34 46 21 04 01 21 05 31 =1530+239 13 59 08 64.0 123.2 -1.6 -44.0 90 70 21 04 02 21 05 57 ARP220 13 59 24 63.5 122.9 -1.6 -44.1 10 70 21 05 57 21 10 27 --- 14 03 55 64.3 124.6 -1.5 -43.0 270 139 21 05 58 21 11 02 J1532+2344 14 04 31 64.9 125.3 -1.5 -42.7 20 139 21 11 02 21 12 32 =1530+239 14 06 11 65.1 126.0 -1.5 -42.2 90 162 21 11 03 21 12 58 ARP220 14 06 27 64.6 125.5 -1.5 -42.4 10 162 21 12 58 21 17 28 --- 14 10 57 65.3 127.4 -1.4 -41.2 270 232 21 12 59 21 18 04 J1532+2344 14 11 33 65.9 128.2 -1.4 -40.7 20 232 21 18 04 21 19 34 =1530+239 14 13 13 66.2 128.9 -1.3 -40.2 90 255 21 18 05 21 19 59 ARP220 14 13 29 65.7 128.4 -1.4 -40.5 10 255 21 19 59 21 24 29 --- 14 18 00 66.4 130.4 -1.3 -39.1 270 325 21 20 00 21 25 05 J1532+2344 14 18 36 67.0 131.3 -1.2 -38.6 20 325 21 25 05 21 26 35 =1530+239 14 20 16 67.2 132.0 -1.2 -38.0 90 348 21 25 06 21 27 01 ARP220 14 20 32 66.7 131.5 -1.3 -38.3 10 348 21 27 01 21 31 31 --- 14 25 02 67.4 133.6 -1.2 -36.8 270 417 21 27 02 21 32 06 J1532+2344 14 25 38 67.9 134.6 -1.1 -36.2 20 417 21 32 06 21 33 36 =1530+239 14 27 18 68.2 135.4 -1.1 -35.6 90 441 21 32 07 21 34 02 ARP220 14 27 34 67.7 134.9 -1.1 -36.0 10 441 21 34 02 21 38 32 --- 14 32 05 68.3 137.1 -1.1 -34.3 270 510 21 34 03 21 39 08 J1532+2344 14 32 40 68.9 138.2 -1.0 -33.6 20 510 21 39 08 21 40 38 =1530+239 14 34 21 69.1 139.1 -1.0 -32.9 90 533 21 39 09 Schedule for YEBES40M (Code Ys ) Page 3 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 7 Jun 2017 Day 158 --- 21 41 03 ARP220 14 34 36 68.6 138.4 -1.0 -33.4 10 533 21 41 03 21 45 33 --- 14 39 07 69.2 140.9 -0.9 -31.5 270 603 21 41 04 21 46 09 J1532+2344 14 39 43 69.7 142.1 -0.9 -30.7 20 603 21 46 09 21 47 39 =1530+239 14 41 23 69.9 143.0 -0.9 -29.9 90 626 21 46 10 21 48 05 ARP220 14 41 39 69.5 142.3 -0.9 -30.5 10 626 21 48 05 21 52 35 --- 14 46 10 70.0 144.9 -0.8 -28.5 270 696 21 48 06 ---------- 2nd rpt7 (6+1) + rpt5 (1+2+2) ---------- 21 53 36 J1516+1932 14 47 11 68.0 160.5 -0.5 -15.6 31 696 21 53 36 21 56 26 =1514+197 14 50 12 68.1 162.3 -0.5 -14.2 170 739 21 53 37 21 57 23 J1532+2344 14 50 59 70.9 148.8 -0.7 -25.4 28 739 21 57 23 21 58 53 =1530+239 14 52 39 71.1 149.9 -0.7 -24.6 90 763 21 57 24 21 59 18 ARP220 14 52 54 70.7 149.0 -0.7 -25.3 9 763 21 59 18 22 03 18 --- 14 56 55 71.1 151.5 -0.6 -23.3 240 824 21 59 19 22 03 54 J1532+2344 14 57 31 71.5 153.1 -0.6 -22.1 19 824 22 03 54 22 05 24 =1530+239 14 59 11 71.7 154.2 -0.6 -21.2 90 848 22 03 55 22 05 50 ARP220 14 59 27 71.3 153.2 -0.6 -21.9 9 848 22 05 50 22 09 50 --- 15 03 28 71.6 155.9 -0.5 -19.8 240 909 22 05 51 22 10 25 J1532+2344 15 04 03 72.1 157.6 -0.5 -18.5 19 909 22 10 25 22 11 55 =1530+239 15 05 44 72.2 158.8 -0.5 -17.5 90 933 22 10 26 22 12 21 ARP220 15 05 59 71.8 157.6 -0.5 -18.4 9 933 22 12 21 22 16 21 --- 15 10 00 72.1 160.5 -0.4 -16.1 240 994 22 12 22 22 16 57 J1532+2344 15 10 36 72.5 162.3 -0.4 -14.6 19 994 22 16 57 22 18 27 =1530+239 15 12 16 72.6 163.5 -0.4 -13.6 90 1018 22 16 58 22 18 52 ARP220 15 12 32 72.2 162.3 -0.4 -14.6 9 1018 22 18 52 22 22 52 --- 15 16 32 72.5 165.3 -0.3 -12.2 240 1080 22 18 53 22 23 28 J1532+2344 15 17 08 72.8 167.2 -0.3 -10.6 19 1080 22 23 28 22 24 58 =1530+239 15 18 48 72.9 168.5 -0.2 -9.5 90 1103 22 23 29 22 25 23 ARP220 15 19 04 72.6 167.2 -0.3 -10.6 9 1103 22 25 23 22 29 23 --- 15 23 05 72.7 170.2 -0.2 -8.1 240 1165 22 25 24 Schedule for YEBES40M (Code Ys ) Page 4 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 7 Jun 2017 Day 158 --- 22 29 59 J1532+2344 15 23 40 73.0 172.2 -0.2 -6.4 19 1165 22 29 59 22 31 29 =1530+239 15 25 21 73.1 173.5 -0.1 -5.4 90 1188 22 30 00 22 31 55 ARP220 15 25 36 72.8 172.1 -0.2 -6.5 9 1188 22 31 55 22 35 55 --- 15 29 37 72.9 175.2 -0.1 -3.9 240 1250 22 31 56 22 36 30 J1532+2344 15 30 13 73.1 177.4 -0.1 -2.2 19 1250 22 36 30 22 38 00 =1530+239 15 31 53 73.2 178.7 -0.0 -1.1 90 1273 22 36 31 22 38 26 ARP220 15 32 09 72.9 177.2 -0.1 -2.3 9 1273 22 38 26 22 42 26 --- 15 36 09 72.9 180.3 0.0 0.3 240 1335 22 38 27 22 43 02 J1532+2344 15 36 45 73.1 182.5 0.1 2.1 19 1335 22 43 02 22 44 32 =1530+239 15 38 25 73.1 183.9 0.1 3.2 90 1358 22 43 03 22 44 57 ARP220 15 38 41 72.9 182.3 0.0 1.9 9 1358 22 44 57 22 48 57 --- 15 42 42 72.9 185.4 0.1 4.5 240 1420 22 44 58 22 49 33 J1532+2344 15 43 17 73.0 187.7 0.2 6.4 19 1420 22 49 33 22 51 03 =1530+239 15 44 58 73.0 189.0 0.2 7.4 90 1443 22 49 34 22 51 29 ARP220 15 45 13 72.8 187.4 0.2 6.1 9 1443 22 51 29 22 55 29 --- 15 49 14 72.7 190.5 0.2 8.7 240 1505 22 51 30 22 56 04 J1532+2344 15 49 50 72.8 192.7 0.3 10.5 19 1505 22 56 04 22 57 34 =1530+239 15 51 30 72.7 194.0 0.3 11.6 90 1528 22 56 05 22 58 00 ARP220 15 51 46 72.6 192.4 0.3 10.2 9 1528 22 58 00 23 02 00 --- 15 55 46 72.4 195.4 0.3 12.7 240 1590 22 58 01 23 02 36 J1532+2344 15 56 22 72.5 197.6 0.4 14.5 19 1590 23 02 36 23 04 06 =1530+239 15 58 02 72.4 198.8 0.4 15.5 90 1613 23 02 37 23 04 31 ARP220 15 58 18 72.3 197.2 0.4 14.2 9 1613 23 04 31 23 08 31 --- 16 02 19 72.0 200.1 0.4 16.6 240 1675 23 04 32 23 09 07 J1532+2344 16 02 55 72.1 202.3 0.5 18.4 19 1675 23 09 07 23 10 37 =1530+239 16 04 35 71.9 203.5 0.5 19.3 90 1698 23 09 08 23 11 03 ARP220 16 04 51 71.9 201.9 0.5 18.0 9 1698 23 11 03 23 15 03 --- 16 08 51 71.6 204.7 0.6 20.3 240 1760 23 11 04 Schedule for YEBES40M (Code Ys ) Page 5 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Wed 7 Jun 2017 Day 158 --- ---------- 1st post-VLA block (no Yy) ---------- 23 15 56 J1516+1932 16 09 44 66.2 211.7 0.9 25.1 31 1760 23 15 56 23 18 46 =1514+197 16 12 45 65.9 213.3 0.9 26.2 170 1803 23 15 57 23 19 38 J1532+2344 16 13 28 71.2 209.5 0.7 24.1 32 1803 23 19 38 23 21 08 =1530+239 16 15 08 71.0 210.6 0.7 25.0 90 1827 23 19 39 23 21 34 ARP220 16 15 24 71.0 209.0 0.7 23.7 9 1827 23 21 34 23 25 34 --- 16 19 24 70.6 211.6 0.7 25.7 240 1888 23 21 35 23 26 10 J1532+2344 16 20 00 70.5 213.6 0.8 27.3 19 1888 23 26 10 23 27 40 =1530+239 16 21 40 70.4 214.6 0.8 28.1 90 1912 23 26 11 23 28 05 ARP220 16 21 56 70.4 213.1 0.8 26.9 9 1912 23 28 05 23 32 05 --- 16 25 57 69.9 215.5 0.8 28.8 240 1974 23 28 06 ---------- 2nd post-VLA block ---------- 23 32 41 J1532+2344 16 26 32 69.8 217.5 0.9 30.3 19 1974 23 32 41 23 34 11 =1530+239 16 28 13 69.6 218.4 0.9 31.0 90 1997 23 32 42 23 34 37 ARP220 16 28 28 69.6 217.0 0.9 29.9 9 1997 23 34 37 23 38 37 --- 16 32 29 69.2 219.2 0.9 31.6 240 2059 23 34 38 23 39 12 J1532+2344 16 33 05 69.0 221.1 1.0 33.1 19 2059 23 39 12 23 40 32 =1530+239 16 34 35 68.8 221.9 1.0 33.7 80 2079 23 39 13 23 40 58 ARP220 16 34 51 68.9 220.5 1.0 32.6 9 2079 23 40 58 23 44 58 --- 16 38 51 68.4 222.6 1.1 34.1 240 2141 23 40 59 23 45 34 J1532+2344 16 39 27 68.2 224.4 1.1 35.5 19 2141 23 45 34 23 46 54 =1530+239 16 40 57 68.0 225.1 1.1 36.0 80 2162 23 45 35 23 47 19 ARP220 16 41 13 68.1 223.8 1.1 35.0 9 2162 23 47 19 23 51 19 --- 16 45 14 67.5 225.8 1.2 36.4 240 2223 23 47 20 23 52 13 J1516+1932 16 46 08 61.7 228.5 1.5 37.1 33 2223 23 52 13 23 53 13 =1514+197 16 47 18 61.6 228.9 1.5 37.4 60 2239 23 52 14 23 53 45 J1516+1932 16 47 40 61.5 229.1 1.5 37.5 16 2239 23 53 45 23 55 35 =1514+197 16 49 40 61.2 229.8 1.5 38.0 110 2267 23 53 46 23 56 28 J1532+2344 16 50 23 66.7 229.6 1.3 39.2 33 2267 23 56 28 23 57 58 =1530+239 16 52 04 66.4 230.3 1.3 39.7 90 2290 23 56 29 Schedule for YEBES40M (Code Ys ) Page 6 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Start: Wed 7 Jun 2017 Day 158 -- Stop: Thu 8 Jun 2017 Day 159 --- 23 58 24 ARP220 16 52 19 66.5 229.1 1.3 38.8 9 2290 23 58 24 00 02 24 --- 16 56 20 66.0 230.9 1.3 40.0 240 2352 23 58 25 00 02 59 J1532+2344 16 56 56 65.7 232.4 1.4 41.1 19 2352 00 02 59 00 04 29 =1530+239 16 58 36 65.5 233.1 1.4 41.6 90 2375 00 03 00 00 04 55 ARP220 16 58 52 65.6 231.9 1.4 40.7 9 2375 00 04 55 00 08 55 --- 17 02 52 65.0 233.6 1.5 41.8 240 2437 00 04 56 00 09 31 J1532+2344 17 03 28 64.7 235.1 1.5 42.9 19 2437 00 09 31 00 11 01 =1530+239 17 05 08 64.5 235.7 1.5 43.3 90 2460 00 09 32 00 11 26 ARP220 17 05 24 64.6 234.6 1.5 42.5 9 2460 00 11 26 00 15 26 --- 17 09 25 64.0 236.2 1.6 43.5 240 2522 00 11 27 00 16 02 J1532+2344 17 10 01 63.7 237.6 1.6 44.5 19 2522 00 16 02 00 17 32 =1530+239 17 11 41 63.4 238.2 1.6 44.8 90 2545 00 16 03 00 17 58 ARP220 17 11 56 63.6 237.1 1.6 44.1 9 2545 00 17 58 00 21 58 --- 17 15 57 62.9 238.6 1.7 45.0 240 2607 00 17 59 00 22 33 J1532+2344 17 16 33 62.6 239.9 1.7 45.9 20 2607 00 22 33 00 24 03 =1530+239 17 18 13 62.3 240.5 1.7 46.2 90 2630 00 22 34 00 24 29 ARP220 17 18 29 62.5 239.5 1.7 45.5 9 2630 00 24 29 00 28 29 --- 17 22 30 61.8 240.8 1.8 46.3 240 2692 00 24 30 00 29 23 J1516+1932 17 23 24 55.9 241.3 2.1 45.0 34 2692 00 29 23 00 30 23 =1514+197 17 24 34 55.7 241.6 2.1 45.2 60 2708 00 29 24 00 30 55 J1516+1932 17 24 56 55.7 241.7 2.1 45.2 16 2708 00 30 55 00 32 45 =1514+197 17 26 56 55.3 242.3 2.2 45.6 110 2736 00 30 56 00 33 38 J1532+2344 17 27 40 60.8 243.6 1.9 48.0 33 2736 00 33 38 00 34 58 =1530+239 17 29 10 60.5 244.0 1.9 48.3 80 2757 00 33 39 00 35 24 ARP220 17 29 26 60.7 243.1 1.9 47.6 10 2757 00 35 24 00 39 24 --- 17 33 26 60.0 244.3 2.0 48.3 240 2819 00 35 25 00 40 00 J1532+2344 17 34 02 59.7 245.5 2.0 49.1 20 2819 00 40 00 00 41 20 =1530+239 17 35 32 59.4 245.9 2.0 49.3 80 2839 00 40 01 00 41 45 ARP220 17 35 48 59.6 245.0 2.0 48.7 10 2839 00 41 45 00 45 45 --- 17 39 49 58.9 246.2 2.1 49.3 240 2901 00 41 46 Schedule for YEBES40M (Code Ys ) Page 7 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 00 46 21 J1532+2344 17 40 25 58.6 247.3 2.1 50.0 20 2901 00 46 21 00 47 51 =1530+239 17 42 05 58.3 247.8 2.1 50.2 90 2924 00 46 22 00 48 17 ARP220 17 42 21 58.4 246.9 2.1 49.7 10 2924 00 48 17 00 52 17 --- 17 46 21 57.7 248.1 2.2 50.2 240 2986 00 48 18 00 52 52 J1532+2344 17 46 57 57.4 249.1 2.2 50.9 20 2986 00 52 52 00 54 22 =1530+239 17 48 37 57.1 249.6 2.3 51.1 90 3009 00 52 53 00 54 48 ARP220 17 48 53 57.3 248.7 2.2 50.6 10 3009 00 54 48 00 58 48 --- 17 52 54 56.6 249.8 2.3 51.0 240 3071 00 54 49 00 59 24 J1532+2344 17 53 29 56.2 250.9 2.3 51.6 20 3071 00 59 24 01 00 54 =1530+239 17 55 10 55.9 251.3 2.4 51.8 90 3094 00 59 25 01 01 15 ARP220 17 55 21 56.1 250.5 2.3 51.3 5 3094 01 01 15 01 05 15 --- 17 59 22 55.4 251.5 2.4 51.8 240 3156 01 01 16 01 06 10 J1516+1932 18 00 16 49.5 251.0 2.7 49.7 34 3156 01 06 10 01 07 10 =1514+197 18 01 27 49.3 251.3 2.7 49.8 60 3172 01 06 11 01 07 35 J1516+1932 18 01 42 49.3 251.3 2.7 49.8 10 3172 01 07 35 01 09 25 =1514+197 18 03 42 48.9 251.8 2.8 50.0 110 3200 01 07 36 01 10 18 J1532+2344 18 04 26 54.3 253.6 2.5 52.8 33 3200 01 10 18 01 11 48 =1530+239 18 06 06 53.9 253.9 2.5 52.9 90 3223 01 10 19 01 12 09 ARP220 18 06 17 54.2 253.2 2.5 52.5 5 3223 01 12 09 01 16 09 --- 18 10 18 53.4 254.1 2.6 52.8 240 3285 01 12 10 01 16 41 J1532+2344 18 10 49 53.1 255.0 2.6 53.3 16 3285 01 16 41 01 18 11 =1530+239 18 12 30 52.8 255.4 2.6 53.4 90 3308 01 16 42 01 18 32 ARP220 18 12 41 53.0 254.7 2.6 53.0 5 3308 01 18 32 01 22 32 --- 18 16 41 52.3 255.6 2.7 53.4 240 3370 01 18 33 01 23 03 J1532+2344 18 17 13 51.9 256.5 2.7 53.8 16 3370 01 23 03 01 24 33 =1530+239 18 18 53 51.6 256.8 2.8 53.9 90 3393 01 23 04 01 24 54 ARP220 18 19 04 51.8 256.1 2.7 53.5 5 3393 01 24 54 01 28 54 --- 18 23 05 51.1 257.0 2.8 53.8 240 3455 01 24 55 01 29 25 J1532+2344 18 23 36 50.7 257.8 2.8 54.2 15 3455 01 29 25 01 30 55 =1530+239 18 25 16 50.4 258.2 2.9 54.3 90 3478 01 29 26 Schedule for YEBES40M (Code Ys ) Page 8 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 01 31 16 ARP220 18 25 27 50.6 257.5 2.8 54.0 5 3478 01 31 16 01 35 16 --- 18 29 28 49.9 258.3 2.9 54.2 240 3540 01 31 17 01 35 47 J1532+2344 18 29 59 49.5 259.2 2.9 54.6 15 3540 01 35 47 01 37 17 =1530+239 18 31 39 49.2 259.5 3.0 54.7 90 3563 01 35 48 01 37 38 ARP220 18 31 50 49.5 258.8 2.9 54.4 5 3563 01 37 38 01 41 38 --- 18 35 50 48.7 259.6 3.0 54.6 240 3625 01 37 39 01 42 33 J1516+1932 18 36 45 42.8 258.8 3.3 52.3 34 3625 01 42 33 01 43 33 =1514+197 18 37 56 42.6 259.0 3.3 52.3 60 3640 01 42 34 01 43 58 J1516+1932 18 38 11 42.6 259.1 3.3 52.3 10 3640 01 43 58 01 45 48 =1514+197 18 40 11 42.2 259.5 3.4 52.4 110 3669 01 43 59 01 46 41 J1532+2344 18 40 55 47.5 261.3 3.1 55.1 33 3669 01 46 41 01 48 11 =1530+239 18 42 35 47.2 261.7 3.2 55.2 90 3692 01 46 42 01 48 32 ARP220 18 42 46 47.4 261.0 3.1 54.9 5 3692 01 48 32 01 52 32 --- 18 46 46 46.7 261.8 3.2 55.1 240 3754 01 48 33 01 53 03 J1532+2344 18 47 17 46.3 262.6 3.2 55.4 15 3754 01 53 03 01 54 33 =1530+239 18 48 57 46.0 262.9 3.3 55.4 90 3777 01 53 04 01 54 53 ARP220 18 49 08 46.2 262.2 3.2 55.2 5 3777 01 54 53 01 58 53 --- 18 53 09 45.5 263.0 3.3 55.3 240 3839 01 54 54 01 59 24 J1532+2344 18 53 39 45.1 263.7 3.3 55.6 15 3839 01 59 24 02 00 54 =1530+239 18 55 20 44.8 264.0 3.4 55.6 90 3862 01 59 25 02 01 14 ARP220 18 55 30 45.0 263.4 3.3 55.4 5 3862 02 01 14 02 05 14 --- 18 59 31 44.3 264.1 3.4 55.5 240 3924 02 01 15 02 05 45 J1532+2344 19 00 02 43.9 264.9 3.4 55.8 15 3924 02 05 45 02 07 15 =1530+239 19 01 42 43.6 265.2 3.5 55.8 90 3947 02 05 46 02 07 35 ARP220 19 01 52 43.8 264.6 3.4 55.6 5 3947 02 07 35 02 11 35 --- 19 05 53 43.1 265.3 3.5 55.7 240 4009 02 07 36 02 12 06 J1532+2344 19 06 24 42.7 266.0 3.5 55.9 15 4009 02 12 06 02 13 36 =1530+239 19 08 04 42.4 266.3 3.6 55.9 90 4032 02 12 07 02 13 56 ARP220 19 08 14 42.6 265.7 3.5 55.7 5 4032 02 13 56 02 17 56 --- 19 12 15 41.8 266.4 3.6 55.8 240 4094 02 13 57 Schedule for YEBES40M (Code Ys ) Page 9 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 02 18 51 J1516+1932 19 13 10 36.0 265.5 3.9 53.5 34 4094 02 18 51 02 19 51 =1514+197 19 14 20 35.7 265.7 3.9 53.5 60 4109 02 18 52 02 20 16 J1516+1932 19 14 35 35.7 265.8 3.9 53.5 10 4109 02 20 16 02 22 06 =1514+197 19 16 35 35.3 266.1 4.0 53.6 110 4138 02 20 17 02 22 59 J1532+2344 19 17 19 40.6 267.9 3.7 56.0 33 4138 02 22 59 02 24 29 =1530+239 19 18 59 40.3 268.2 3.8 56.1 90 4161 02 23 00 02 24 50 ARP220 19 19 09 40.5 267.6 3.7 55.9 4 4161 02 24 50 02 28 50 --- 19 23 10 39.8 268.3 3.8 55.9 240 4223 02 24 51 02 29 20 J1532+2344 19 23 41 39.4 269.0 3.8 56.1 15 4223 02 29 20 02 30 50 =1530+239 19 25 21 39.1 269.2 3.9 56.1 90 4246 02 29 21 02 31 10 ARP220 19 25 31 39.3 268.6 3.8 55.9 4 4246 02 31 10 02 35 10 --- 19 29 32 38.6 269.3 3.9 55.9 240 4308 02 31 11 02 35 40 J1532+2344 19 30 02 38.2 270.0 3.9 56.1 15 4308 02 35 40 02 37 10 =1530+239 19 31 42 37.9 270.3 4.0 56.1 90 4331 02 35 41 02 37 30 ARP220 19 31 52 38.1 269.7 3.9 55.9 4 4331 02 37 30 02 41 30 --- 19 35 53 37.4 270.3 4.0 55.9 240 4393 02 37 31 02 42 01 J1532+2344 19 36 23 37.0 271.0 4.0 56.1 15 4393 02 42 01 02 43 31 =1530+239 19 38 04 36.7 271.3 4.1 56.1 90 4416 02 42 02 02 43 51 ARP220 19 38 14 36.9 270.7 4.0 55.9 4 4416 02 43 51 02 47 51 --- 19 42 14 36.2 271.4 4.1 55.9 240 4478 02 43 52 02 48 21 J1532+2344 19 42 45 35.8 272.0 4.2 56.0 15 4478 02 48 21 02 49 51 =1530+239 19 44 25 35.5 272.3 4.2 56.0 90 4501 02 48 22 02 50 11 ARP220 19 44 35 35.7 271.7 4.1 55.9 4 4501 02 50 11 02 54 11 --- 19 48 35 34.9 272.4 4.2 55.9 240 4563 02 50 12 02 55 10 J1516+1932 19 49 34 29.1 271.5 4.5 53.7 38 4563 02 55 10 02 56 10 =1514+197 19 50 45 28.8 271.7 4.5 53.7 60 4578 02 55 11 02 56 35 J1516+1932 19 51 00 28.8 271.8 4.6 53.7 10 4578 02 56 35 02 58 25 =1514+197 19 53 00 28.4 272.1 4.6 53.7 110 4607 02 56 36 02 59 18 J1532+2344 19 53 44 33.7 273.7 4.3 55.9 33 4607 02 59 18 03 00 48 =1530+239 19 55 24 33.4 274.0 4.4 55.9 90 4630 02 59 19 Schedule for YEBES40M (Code Ys ) Page 10 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 03 01 08 ARP220 19 55 34 33.6 273.5 4.3 55.8 4 4630 03 01 08 03 05 08 --- 19 59 34 32.9 274.1 4.4 55.7 240 4692 03 01 09 03 05 38 J1532+2344 20 00 05 32.5 274.7 4.4 55.8 15 4692 03 05 38 03 07 08 =1530+239 20 01 45 32.2 275.0 4.5 55.8 90 4715 03 05 39 03 07 28 ARP220 20 01 55 32.4 274.4 4.4 55.7 4 4715 03 07 28 03 11 28 --- 20 05 55 31.7 275.0 4.5 55.6 240 4777 03 07 29 03 11 58 J1532+2344 20 06 25 31.3 275.7 4.5 55.7 15 4777 03 11 58 03 13 28 =1530+239 20 08 06 31.0 275.9 4.6 55.6 90 4800 03 11 59 03 13 48 ARP220 20 08 15 31.2 275.4 4.5 55.6 4 4800 03 13 48 03 17 48 --- 20 12 16 30.5 276.0 4.6 55.5 240 4862 03 13 49 03 18 18 J1532+2344 20 12 46 30.1 276.6 4.7 55.5 14 4862 03 18 18 03 19 48 =1530+239 20 14 26 29.8 276.9 4.7 55.5 90 4885 03 18 19 03 20 07 ARP220 20 14 36 30.0 276.4 4.6 55.4 4 4885 03 20 07 03 24 07 --- 20 18 37 29.3 277.0 4.7 55.3 240 4947 03 20 08 03 24 37 J1532+2344 20 19 07 28.9 277.6 4.8 55.4 14 4947 03 24 37 03 26 07 =1530+239 20 20 47 28.6 277.8 4.8 55.3 90 4970 03 24 38 03 26 27 ARP220 20 20 57 28.8 277.3 4.8 55.3 4 4970 03 26 27 03 30 27 --- 20 24 57 28.1 277.9 4.8 55.2 240 5032 03 26 28 03 31 22 J1516+1932 20 25 52 22.2 277.2 5.1 53.1 34 5032 03 31 22 03 32 22 =1514+197 20 27 03 22.0 277.4 5.2 53.1 60 5047 03 31 23 03 32 47 J1516+1932 20 27 18 21.9 277.4 5.2 53.1 10 5047 03 32 47 03 34 37 =1514+197 20 29 18 21.5 277.7 5.2 53.0 110 5075 03 32 48 03 35 30 J1532+2344 20 30 02 26.8 279.2 4.9 55.0 33 5075 03 35 30 03 37 00 =1530+239 20 31 42 26.5 279.4 5.0 55.0 90 5099 03 35 31 03 37 20 ARP220 20 31 52 26.8 278.9 4.9 54.9 4 5099 03 37 20 03 41 20 --- 20 35 52 26.0 279.5 5.0 54.8 240 5160 03 37 21 03 41 50 J1532+2344 20 36 22 25.6 280.1 5.0 54.8 14 5160 03 41 50 03 43 20 =1530+239 20 38 03 25.3 280.4 5.1 54.7 90 5184 03 41 51 03 43 39 ARP220 20 38 12 25.6 279.9 5.0 54.7 4 5184 03 43 39 03 47 39 --- 20 42 13 24.8 280.4 5.1 54.6 240 5246 03 43 40 Schedule for YEBES40M (Code Ys ) Page 11 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 03 48 09 J1532+2344 20 42 43 24.5 281.0 5.2 54.6 14 5246 03 48 09 03 49 39 =1530+239 20 44 23 24.2 281.3 5.2 54.5 90 5269 03 48 10 03 49 59 ARP220 20 44 33 24.4 280.8 5.1 54.5 4 5269 03 49 59 03 53 59 --- 20 48 33 23.6 281.4 5.2 54.3 240 5331 03 50 00 03 54 29 J1532+2344 20 49 03 23.3 282.0 5.3 54.3 14 5331 03 54 29 03 55 59 =1530+239 20 50 43 23.0 282.2 5.3 54.2 90 5354 03 54 30 03 56 18 ARP220 20 50 53 23.2 281.7 5.3 54.2 4 5354 03 56 18 04 00 18 --- 20 54 54 22.5 282.3 5.3 54.1 240 5416 03 56 19 04 00 48 J1532+2344 20 55 23 22.1 282.9 5.4 54.0 14 5416 04 00 48 04 02 18 =1530+239 20 57 04 21.8 283.1 5.4 53.9 90 5439 04 00 49 04 02 37 ARP220 20 57 13 22.0 282.6 5.4 53.9 4 5439 04 02 37 04 06 37 --- 21 01 14 21.3 283.2 5.4 53.8 240 5501 04 02 38 04 07 23 J1516+1932 21 01 59 15.4 282.7 5.7 51.9 25 5501 04 07 23 04 08 23 =1514+197 21 03 10 15.2 282.8 5.8 51.8 60 5516 04 07 24 04 08 48 J1516+1932 21 03 25 15.2 282.9 5.8 51.8 10 5516 04 08 48 04 10 38 =1514+197 21 05 25 14.8 283.2 5.8 51.7 110 5544 04 08 49 04 11 31 J1532+2344 21 06 09 20.1 284.5 5.5 53.5 33 5544 04 11 31 04 13 01 =1530+239 21 07 49 19.8 284.7 5.6 53.4 90 5568 04 11 32 04 13 21 ARP220 21 07 58 20.0 284.2 5.5 53.4 4 5568 04 13 21 04 17 21 --- 21 11 59 19.3 284.8 5.6 53.2 240 5629 04 13 22 04 17 51 J1532+2344 21 12 29 19.0 285.4 5.6 53.2 14 5629 04 17 51 04 19 21 =1530+239 21 14 09 18.6 285.6 5.7 53.1 90 5653 04 17 52 04 19 40 ARP220 21 14 19 18.9 285.1 5.6 53.1 4 5653 04 19 40 04 23 40 --- 21 18 19 18.1 285.7 5.7 52.9 240 5714 04 19 41 04 24 10 J1532+2344 21 18 49 17.8 286.3 5.8 52.8 14 5714 04 24 10 04 25 40 =1530+239 21 20 30 17.5 286.5 5.8 52.7 90 5738 04 24 11 04 25 55 ARP220 21 20 35 17.7 286.0 5.7 52.8 0 5738 04 25 55 04 29 55 --- 21 24 36 17.0 286.6 5.8 52.6 240 5799 04 25 56 04 30 21 J1532+2344 21 25 01 16.7 287.2 5.9 52.5 10 5799 04 30 21 04 31 51 =1530+239 21 26 42 16.4 287.4 5.9 52.4 90 5823 04 30 22 Schedule for YEBES40M (Code Ys ) Page 12 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 04 32 06 ARP220 21 26 47 16.6 286.9 5.9 52.4 0 5823 04 32 06 04 36 06 --- 21 30 48 15.9 287.5 5.9 52.2 240 5884 04 32 07 04 36 32 J1532+2344 21 31 13 15.5 288.1 6.0 52.1 10 5884 04 36 32 04 38 02 =1530+239 21 32 54 15.2 288.3 6.0 52.0 90 5908 04 36 33 04 38 17 ARP220 21 32 59 15.5 287.8 6.0 52.1 0 5908 04 38 17 04 42 17 --- 21 37 00 14.8 288.4 6.0 51.8 240 5969 04 38 18 04 43 02 J1516+1932 21 37 44 8.9 288.1 6.3 50.0 24 5969 04 43 02 04 44 02 =1514+197 21 38 55 8.7 288.3 6.4 50.0 60 5985 04 43 03 04 44 27 J1516+1932 21 39 10 8.6 288.3 6.4 49.9 10 5985 04 44 27 04 46 17 =1514+197 21 41 10 8.3 288.6 6.4 49.8 110 6013 04 44 28 04 47 03 J1532+2344 21 41 46 13.6 289.6 6.1 51.4 25 6013 04 47 03 04 48 33 =1530+239 21 43 26 13.4 289.9 6.2 51.3 90 6036 04 47 04 04 48 48 ARP220 21 43 32 13.6 289.4 6.1 51.4 0 6036 04 48 48 04 52 48 --- 21 47 33 12.9 290.0 6.2 51.1 240 6098 04 48 49 04 53 14 J1532+2344 21 47 58 12.5 290.6 6.2 51.0 10 6098 04 53 14 04 54 44 =1530+239 21 49 38 12.2 290.8 6.3 50.9 90 6121 04 53 15 04 54 59 ARP220 21 49 44 12.5 290.3 6.2 51.0 0 6121 04 54 59 04 58 59 --- 21 53 45 11.8 290.9 6.3 50.7 240 6183 04 55 00 04 59 25 J1532+2344 21 54 10 11.4 291.5 6.3 50.6 10 6183 04 59 25 05 00 55 =1530+239 21 55 50 11.1 291.7 6.4 50.5 90 6207 04 59 26 05 01 29 ARP220 21 56 14 11.3 291.3 6.3 50.5 18 6207 05 01 29 05 05 29 --- 22 00 15 10.6 291.9 6.4 50.3 240 6268 05 01 30 05 05 54 J1532+2344 22 00 41 10.3 292.4 6.5 50.1 10 6268 05 05 54 05 07 24 =1530+239 22 02 21 10.0 292.7 6.5 50.0 90 6292 05 05 55 05 07 40 ARP220 22 02 26 10.2 292.2 6.4 50.1 0 6292 05 07 40 05 11 40 --- 22 06 27 9.5 292.8 6.5 49.8 240 6353 05 07 41 05 12 05 J1532+2344 22 06 53 9.2 293.4 6.6 49.6 10 6353 05 12 05 05 13 35 =1530+239 22 08 33 8.9 293.6 6.6 49.5 90 6377 05 12 06 05 13 51 ARP220 22 08 39 9.1 293.1 6.5 49.6 0 6377 05 13 51 05 17 51 --- 22 12 39 8.4 293.7 6.6 49.3 240 6438 05 13 52 Schedule for YEBES40M (Code Ys ) Page 13 6cm global VLBI observations of Arp220 UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 8 Jun 2017 Day 159 --- 05 22 32 J1532+2344 22 17 21 7.4 295.0 6.7 48.8 265 6438 05 22 32 05 24 02 =1530+239 22 19 01 7.1 295.2 6.8 48.7 90 6462 05 22 33 05 24 17 ARP220 22 19 07 7.3 294.7 6.7 48.8 0 6462 05 24 17 05 28 17 --- 22 23 07 6.6 295.3 6.8 48.5 240 6523 05 24 18 05 28 43 J1532+2344 22 23 33 6.3 295.9 6.8 48.3 10 6523 05 28 43 05 30 13 =1530+239 22 25 13 6.0 296.2 6.9 48.2 90 6547 05 28 44 05 30 29 ARP220 22 25 19 6.2 295.7 6.8 48.3 0 6547 05 30 29 05 34 29 --- 22 29 19 5.6 296.3 6.9 48.0 240 6608 05 30 30 05 34 54 J1532+2344 22 29 45 5.3 296.9 6.9 47.8 10 6608 05 34 54 05 36 24 =1530+239 22 31 25 5.0 297.1 7.0 D 47.6 0 6632 05 34 55 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess217.C2048glob --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 20 Station: YEBES40M Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 4158.00 Net SB= L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 3 11 3 11 5 13 5 13 7 15 7 15 BBC SB= L L U U L L U U L L U U L L U U IF = A1 C1 A1 C1 A1 C1 A1 C1 B1 D1 B1 D1 B1 D1 B1 D1 The following frequency sets based on these setups were used. Frequency Set: 9 Setup file default. Used with PCAL = off LO sum= 4772.25 4772.25 4772.25 4772.25 4836.25 4836.25 4836.25 4836.25 4900.25 4900.25 4900.25 4900.25 4964.25 4964.25 4964.25 4964.25 BBC fr= 614.25 614.25 614.25 614.25 678.25 678.25 678.25 678.25 742.25 742.25 742.25 742.25 806.25 806.25 806.25 806.25 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 9 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * ARP220 15 32 46.905485 * 15 34 57.250000 15 35 43.359734 0.00 23 40 07.75728 * 23 30 11.33000 23 26 55.86293 0.00 From catalog imbedded in main SCHED input file. Pos. from Batejat. et al 2011 * 3C286 13 28 49.657758 * 13 31 08.288051 13 31 56.602521 0.18 J1331+3030 30 45 58.64059 * 30 30 32.95924 30 25 24.79116 0.17 1328+307 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J1331+30 GSFC 2015a astro solution, unpublished 225 observations. 1514+197 15 14 40.985840 * 15 16 56.796162 15 17 44.720916 0.01 * J1516+1932 19 43 10.94252 * 19 32 12.99209 19 28 35.77580 0.02 J1516+19 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc GSFC 2015a astro solution, unpublished 2699 observations. 1530+239 15 30 36.092767 * 15 32 46.345222 15 33 32.415948 0.10 * J1532+2344 23 54 09.32921 * 23 44 05.26804 23 40 47.21139 0.17 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc GSFC 2015a astro solution, unpublished 90 observations. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline ARP220 sess217.C2048glob 1 2 3 4 5 6 7 8 9 10 13 15 + 6.750 962.311 3C286 sess217.C2048glob 22 0.067 0.000 J1516+1932 sess217.C2048glob 1 2 3 4 5 6 7 8 9 10 13 15 + 1.456 115.850 J1532+2344 sess217.C2048glob 1 2 3 4 5 6 7 8 9 10 13 15 + 2.541 356.089 EFFECT OF SOLAR CORONA The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) ARP220 128.8 3C286 106.0 J1516+1932 130.1 J1532+2344 128.3 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg