COVER INFORMATION Station: DARNHALL (Code Da ) Experiment: 18cm global VLBI observations of the starburst galaxy Arp 220 Exp. Code: gv028c Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Eskil Varenius Address: Chalmers University of Technology Onsala Space Observatory 439 92 Onsala Sweden Phone: +46706755341 EMAIL: eskil.varenius@chalmers.se Fax: Phone during observation: +46706755341 Observing mode: vlbi Notes: VLA please use all 27 stations at 18cm. Phase calibrator: J1532+2344 Fringe finder: J1516+1932 Pol. cal.: OQ208 COVER LETTER: This is one of three .key files to observe Arp 220 at 18cm, 6cm and 3.6cm during EVN session I 2023. Arp 220 has two nuclei 1 arcsec apart; we aim to point right in the middle of them, to get both at the same time. OPERATOR NOTES: VLA27: Please use all 27 stations at 18cm. Schedule for DARNHALL (Code Da ) Page 2 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Sun 12 Mar 2023 Day 71 --- Next scan frequencies: 1626.00 1626.00 Next BBC frequencies: 646.00 646.00 Next scan bandwidths: 64.00 64.00 22 30 00 J1516+1932 09 41 06 18.9 82.5 -5.6 -39.1 0 0 22 30 00 22 35 00 =1514+197 09 46 07 19.6 83.5 -5.5 -39.2 300 19 22 30 01 22 37 23 OQ208 09 48 30 37.1 91.0 -4.3 -42.9 68 19 22 37 23 22 42 23 --- 09 53 31 37.9 92.0 -4.2 -42.9 300 39 22 37 24 22 44 35 J1532+2344 09 55 43 21.9 79.4 -5.6 -40.1 60 39 22 44 35 22 46 05 =1530+239 09 57 13 22.2 79.7 -5.6 -40.1 90 44 22 44 36 22 46 31 ARP220 09 57 40 21.7 79.5 -5.6 -40.0 14 44 22 46 31 22 57 01 --- 10 08 11 23.3 81.5 -5.5 -40.3 630 85 22 46 32 22 57 28 J1532+2344 10 08 38 23.8 81.9 -5.4 -40.4 13 85 22 57 28 22 58 58 =1530+239 10 10 09 24.1 82.1 -5.4 -40.4 90 91 22 57 29 22 59 24 ARP220 10 10 35 23.6 82.0 -5.4 -40.3 13 91 22 59 24 23 09 54 --- 10 21 07 25.2 84.0 -5.2 -40.5 630 131 22 59 25 23 10 21 J1532+2344 10 21 34 25.8 84.3 -5.2 -40.6 13 131 23 10 21 23 11 51 =1530+239 10 23 04 26.0 84.6 -5.2 -40.7 90 137 23 10 22 23 12 18 ARP220 10 23 31 25.6 84.5 -5.2 -40.6 13 137 23 12 18 23 22 48 --- 10 34 02 27.1 86.5 -5.0 -40.7 630 178 23 12 19 23 23 15 J1532+2344 10 34 29 27.7 86.8 -5.0 -40.8 13 178 23 23 15 23 24 45 =1530+239 10 36 00 27.9 87.1 -5.0 -40.8 90 184 23 23 16 23 25 11 ARP220 10 36 26 27.5 87.0 -5.0 -40.7 13 184 23 25 11 23 35 41 --- 10 46 58 29.1 89.1 -4.8 -40.8 630 224 23 25 12 23 36 08 J1532+2344 10 47 25 29.6 89.4 -4.8 -40.9 13 224 23 36 08 23 37 38 =1530+239 10 48 55 29.9 89.7 -4.7 -40.9 90 230 23 36 09 23 39 54 OQ208 10 51 11 46.4 104.7 -3.3 -41.2 64 230 23 39 54 23 44 54 --- 10 56 12 47.2 106.0 -3.2 -40.9 300 249 23 39 55 23 47 04 J1532+2344 10 58 23 31.3 91.6 -4.6 -40.9 60 249 23 47 04 23 48 34 =1530+239 10 59 53 31.5 91.9 -4.6 -40.9 90 255 23 47 05 23 49 01 ARP220 11 00 20 31.1 91.7 -4.6 -40.8 13 255 23 49 01 23 59 31 --- 11 10 52 32.6 93.9 -4.4 -40.7 630 296 23 49 02 Schedule for DARNHALL (Code Da ) Page 3 18cm global VLBI observations of the starburst galaxy Arp 220 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: Sun 12 Mar 2023 Day 71 -- Stop: Mon 13 Mar 2023 Day 72 --- 23 59 58 J1532+2344 11 11 19 33.2 94.3 -4.4 -40.8 13 296 23 59 58 00 01 28 =1530+239 11 12 49 33.4 94.6 -4.3 -40.7 90 301 23 59 59 00 01 54 ARP220 11 13 15 33.0 94.4 -4.4 -40.7 13 301 00 01 54 00 12 24 --- 11 23 47 34.6 96.6 -4.2 -40.5 630 342 00 01 55 00 12 51 J1532+2344 11 24 14 35.1 97.0 -4.2 -40.5 13 342 00 12 51 00 14 21 =1530+239 11 25 44 35.4 97.3 -4.1 -40.5 90 348 00 12 52 00 14 47 ARP220 11 26 11 34.9 97.1 -4.2 -40.4 13 348 00 14 47 00 25 17 --- 11 36 42 36.5 99.4 -4.0 -40.1 630 388 00 14 48 00 25 44 J1532+2344 11 37 09 37.1 99.8 -3.9 -40.2 13 388 00 25 44 00 27 14 =1530+239 11 38 40 37.3 100.1 -3.9 -40.1 90 394 00 25 45 00 27 41 ARP220 11 39 06 36.8 99.9 -3.9 -40.1 13 394 00 27 41 00 38 11 --- 11 49 38 38.4 102.2 -3.8 -39.7 630 435 00 27 42 00 38 37 J1532+2344 11 50 05 39.0 102.6 -3.7 -39.7 13 435 00 38 37 00 40 07 =1530+239 11 51 35 39.2 103.0 -3.7 -39.6 90 441 00 38 38 00 42 18 OQ208 11 53 45 55.0 121.8 -2.2 -35.4 52 441 00 42 18 00 47 18 --- 11 58 46 55.7 123.4 -2.2 -34.7 300 460 00 42 19 00 49 23 J1532+2344 12 00 52 40.5 105.1 -3.5 -39.2 47 460 00 49 23 00 50 53 =1530+239 12 02 22 40.7 105.5 -3.5 -39.1 90 466 00 49 24 00 51 19 ARP220 12 02 48 40.3 105.3 -3.6 -39.1 13 466 00 51 19 01 01 49 --- 12 13 20 41.8 107.8 -3.4 -38.5 630 506 00 51 20 01 02 16 J1532+2344 12 13 47 42.4 108.2 -3.3 -38.5 13 506 01 02 16 01 03 46 =1530+239 12 15 17 42.6 108.6 -3.3 -38.4 90 512 01 02 17 01 04 12 ARP220 12 15 43 42.2 108.3 -3.3 -38.3 13 512 01 04 12 01 14 42 --- 12 26 15 43.7 110.9 -3.2 -37.6 630 553 01 04 13 01 15 09 J1532+2344 12 26 42 44.2 111.4 -3.1 -37.6 13 553 01 15 09 01 16 39 =1530+239 12 28 12 44.4 111.8 -3.1 -37.4 90 558 01 15 10 01 17 05 ARP220 12 28 38 44.0 111.5 -3.1 -37.4 13 558 01 17 05 01 27 35 --- 12 39 10 45.4 114.2 -2.9 -36.6 630 599 01 17 06 01 28 01 J1532+2344 12 39 37 46.0 114.7 -2.9 -36.5 13 599 01 28 01 01 29 31 =1530+239 12 41 07 46.2 115.1 -2.9 -36.3 90 605 01 28 02 Schedule for DARNHALL (Code Da ) Page 4 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 01 29 58 ARP220 12 41 33 45.8 114.9 -2.9 -36.4 13 605 01 29 58 01 40 28 --- 12 52 05 47.2 117.7 -2.7 -35.3 630 645 01 29 59 01 40 54 J1532+2344 12 52 32 47.7 118.2 -2.7 -35.2 14 645 01 40 54 01 42 24 =1530+239 12 54 02 47.9 118.7 -2.7 -35.1 90 651 01 40 55 01 44 25 OQ208 12 56 03 61.9 144.8 -1.2 -23.1 20 651 01 44 25 01 49 25 --- 13 01 04 62.3 146.9 -1.1 -21.8 300 671 01 44 26 01 51 24 J1532+2344 13 03 03 49.1 121.2 -2.5 -34.0 19 671 01 51 24 01 52 54 =1530+239 13 04 33 49.3 121.7 -2.5 -33.9 90 676 01 51 25 01 53 20 ARP220 13 05 00 48.9 121.4 -2.5 -33.9 14 676 01 53 20 02 03 50 --- 13 15 31 50.2 124.5 -2.3 -32.6 630 717 01 53 21 02 04 18 J1532+2344 13 15 59 50.7 125.1 -2.3 -32.4 15 717 02 04 18 02 05 48 =1530+239 13 17 30 50.9 125.5 -2.3 -32.2 90 723 02 04 19 02 06 15 ARP220 13 17 56 50.5 125.2 -2.3 -32.3 14 723 02 06 15 02 16 45 --- 13 28 28 51.8 128.5 -2.1 -30.8 630 763 02 06 16 02 17 14 J1532+2344 13 28 57 52.3 129.1 -2.1 -30.5 15 763 02 17 14 02 18 44 =1530+239 13 30 27 52.4 129.6 -2.1 -30.3 90 769 02 17 15 02 19 11 ARP220 13 30 55 52.0 129.3 -2.1 -30.4 15 769 02 19 11 02 29 41 --- 13 41 26 53.2 132.7 -1.9 -28.7 630 810 02 19 12 02 30 10 J1532+2344 13 41 56 53.7 133.5 -1.9 -28.4 15 810 02 30 10 02 31 40 =1530+239 13 43 26 53.9 134.0 -1.8 -28.1 90 815 02 30 11 02 32 08 ARP220 13 43 54 53.5 133.6 -1.9 -28.3 15 815 02 32 08 02 42 38 --- 13 54 26 54.6 137.2 -1.7 -26.3 630 856 02 32 09 02 43 08 J1532+2344 13 54 56 55.1 138.0 -1.6 -26.0 15 856 02 43 08 02 44 38 =1530+239 13 56 26 55.2 138.5 -1.6 -25.7 90 862 02 43 09 02 47 21 OQ208 13 59 09 65.1 175.3 -0.1 -3.2 30 862 02 47 21 02 52 21 --- 14 04 10 65.2 178.0 -0.1 -1.4 300 881 02 47 22 02 54 59 J1532+2344 14 06 49 56.2 142.4 -1.4 -23.6 28 881 02 54 59 02 56 29 =1530+239 14 08 19 56.4 143.0 -1.4 -23.2 90 887 02 55 00 02 56 58 ARP220 14 08 48 56.0 142.5 -1.5 -23.5 15 887 02 56 58 03 07 28 --- 14 19 20 56.9 146.5 -1.3 -21.1 630 927 02 56 59 Schedule for DARNHALL (Code Da ) Page 5 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 03 07 59 J1532+2344 14 19 51 57.4 147.4 -1.2 -20.6 15 927 03 07 59 03 09 29 =1530+239 14 21 21 57.5 148.0 -1.2 -20.3 90 933 03 08 00 03 09 59 ARP220 14 21 51 57.1 147.5 -1.2 -20.5 15 933 03 09 59 03 20 29 --- 14 32 23 57.9 151.8 -1.1 -18.0 630 974 03 10 00 03 21 01 J1532+2344 14 32 54 58.3 152.7 -1.0 -17.4 15 974 03 21 01 03 22 31 =1530+239 14 34 25 58.4 153.4 -1.0 -17.1 90 980 03 21 02 03 23 01 ARP220 14 34 55 58.1 152.8 -1.0 -17.4 15 980 03 23 01 03 33 31 --- 14 45 27 58.8 157.2 -0.8 -14.6 630 1020 03 23 02 03 34 03 J1532+2344 14 45 59 59.1 158.3 -0.8 -14.0 15 1020 03 34 03 03 35 33 =1530+239 14 47 29 59.2 159.0 -0.8 -13.6 90 1026 03 34 04 03 36 03 ARP220 14 48 00 58.9 158.3 -0.8 -14.0 15 1026 03 36 03 03 46 33 --- 14 58 31 59.4 162.9 -0.6 -11.1 630 1067 03 36 04 03 47 06 J1532+2344 14 59 04 59.8 164.1 -0.6 -10.4 15 1067 03 47 06 03 48 36 =1530+239 15 00 34 59.8 164.7 -0.6 -9.9 90 1072 03 47 07 03 51 44 OQ208 15 03 43 63.1 207.9 0.9 18.6 36 1072 03 51 44 03 56 44 --- 15 08 43 62.8 210.2 1.0 20.1 300 1092 03 51 45 03 59 41 J1532+2344 15 11 41 60.2 169.8 -0.4 -6.7 32 1092 03 59 41 04 01 11 =1530+239 15 13 11 60.2 170.5 -0.3 -6.2 90 1098 03 59 42 04 01 42 ARP220 15 13 42 60.0 169.8 -0.4 -6.7 14 1098 04 01 42 04 12 12 --- 15 24 14 60.2 174.6 -0.2 -3.5 630 1138 04 01 43 04 12 44 J1532+2344 15 24 47 60.4 175.8 -0.2 -2.7 14 1138 04 12 44 04 14 14 =1530+239 15 26 17 60.5 176.5 -0.1 -2.3 90 1144 04 12 45 04 14 46 ARP220 15 26 48 60.2 175.8 -0.2 -2.8 14 1144 04 14 46 04 25 16 --- 15 37 20 60.3 180.6 0.0 0.4 630 1184 04 14 47 04 25 48 J1532+2344 15 37 53 60.5 181.9 0.1 1.2 14 1184 04 25 48 04 27 18 =1530+239 15 39 23 60.5 182.6 0.1 1.7 90 1190 04 25 49 04 27 49 ARP220 15 39 54 60.3 181.8 0.1 1.2 14 1190 04 27 49 04 38 19 --- 15 50 26 60.1 186.7 0.2 4.4 630 1231 04 27 50 04 38 52 J1532+2344 15 50 59 60.3 188.0 0.3 5.2 13 1231 04 38 52 04 40 22 =1530+239 15 52 29 60.3 188.7 0.3 5.7 90 1237 04 38 53 Schedule for DARNHALL (Code Da ) Page 6 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 04 40 53 ARP220 15 53 00 60.1 187.9 0.3 5.1 14 1237 04 40 53 04 51 23 --- 16 03 32 59.8 192.6 0.5 8.2 630 1277 04 40 54 04 51 55 J1532+2344 16 04 04 59.9 193.9 0.5 9.1 13 1277 04 51 55 04 53 25 =1530+239 16 05 34 59.9 194.6 0.5 9.5 90 1283 04 51 56 04 56 16 OQ208 16 08 26 56.8 233.6 2.0 33.3 31 1283 04 56 16 04 57 16 --- 16 09 26 56.7 234.0 2.0 33.4 60 1287 04 56 17 04 57 16 OQ208 16 09 26 56.7 234.0 2.0 33.4 -2 1287 No stop 05 01 16 --- 16 13 27 56.2 235.3 2.1 34.1 238 1302 04 57 17 05 03 55 J1532+2344 16 16 06 59.4 199.3 0.7 12.5 28 1302 05 03 55 05 04 55 =1530+239 16 17 06 59.4 199.7 0.7 12.8 60 1306 05 03 56 05 04 55 J1532+2344 16 17 06 59.4 199.7 0.7 12.8 -2 1306 No stop 05 05 25 =1530+239 16 17 36 59.4 200.0 0.7 12.9 28 1308 05 04 56 05 05 56 ARP220 16 18 07 59.2 199.1 0.7 12.4 13 1308 05 05 56 05 16 26 --- 16 28 39 58.6 203.7 0.9 15.2 630 1349 05 05 57 05 16 58 J1532+2344 16 29 11 58.7 205.0 0.9 16.0 13 1349 05 16 58 05 17 58 =1530+239 16 30 11 58.6 205.4 0.9 16.3 60 1353 05 16 59 05 17 58 J1532+2344 16 30 11 58.6 205.4 0.9 16.3 -2 1353 No stop 05 18 28 =1530+239 16 30 41 58.6 205.6 0.9 16.4 28 1355 05 17 59 05 18 58 ARP220 16 31 11 58.5 204.8 0.9 15.9 13 1355 05 18 58 05 29 28 --- 16 41 43 57.8 209.1 1.1 18.5 630 1395 05 18 59 05 30 00 J1532+2344 16 42 15 57.8 210.4 1.1 19.3 13 1395 05 30 00 05 31 00 =1530+239 16 43 15 57.7 210.8 1.2 19.6 60 1399 05 30 01 05 31 00 J1532+2344 16 43 15 57.7 210.8 1.2 19.6 -2 1399 No stop 05 31 30 =1530+239 16 43 45 57.7 211.0 1.2 19.7 28 1401 05 31 01 05 32 00 ARP220 16 44 15 57.6 210.2 1.1 19.2 13 1401 05 32 00 05 42 30 --- 16 54 47 56.7 214.3 1.3 21.6 630 1441 05 32 01 05 43 01 J1532+2344 16 55 18 56.7 215.5 1.4 22.4 12 1441 05 43 01 05 44 01 =1530+239 16 56 18 56.6 215.9 1.4 22.6 60 1445 05 43 02 05 44 01 J1532+2344 16 56 18 56.6 215.9 1.4 22.6 -2 1445 No stop 05 44 31 =1530+239 16 56 48 56.6 216.1 1.4 22.7 28 1447 05 44 02 Schedule for DARNHALL (Code Da ) Page 7 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 05 45 01 ARP220 16 57 18 56.5 215.3 1.4 22.2 13 1447 05 45 01 05 55 31 --- 17 07 50 55.6 219.3 1.5 24.4 630 1488 05 45 02 05 56 01 J1532+2344 17 08 21 55.5 220.4 1.6 25.1 12 1488 05 56 01 05 57 31 =1530+239 17 09 51 55.4 221.0 1.6 25.4 90 1494 05 56 02 05 59 51 OQ208 17 12 11 48.3 252.1 3.1 40.4 24 1494 05 59 51 06 00 51 --- 17 13 11 48.1 252.4 3.1 40.5 60 1498 05 59 52 06 00 51 OQ208 17 13 11 48.1 252.4 3.1 40.5 -2 1498 No stop 06 04 51 --- 17 17 12 47.6 253.4 3.2 40.8 238 1513 06 00 52 06 07 02 J1532+2344 17 19 23 54.4 224.4 1.8 27.3 21 1513 06 07 02 06 08 02 =1530+239 17 20 23 54.3 224.7 1.8 27.4 60 1517 06 07 03 06 08 02 J1532+2344 17 20 23 54.3 224.7 1.8 27.4 -2 1517 No stop 06 08 32 =1530+239 17 20 53 54.2 224.9 1.8 27.5 28 1519 06 08 03 06 09 01 ARP220 17 21 23 54.2 224.1 1.8 27.1 13 1519 06 09 01 06 19 31 --- 17 31 54 53.1 227.7 1.9 28.9 630 1559 06 09 02 06 20 01 J1532+2344 17 32 25 53.0 228.8 2.0 29.5 12 1559 06 20 01 06 21 01 =1530+239 17 33 25 52.9 229.2 2.0 29.7 60 1563 06 20 02 06 21 01 J1532+2344 17 33 25 52.9 229.2 2.0 29.7 -2 1563 No stop 06 21 31 =1530+239 17 33 55 52.8 229.3 2.0 29.8 28 1565 06 21 02 06 22 00 ARP220 17 34 24 52.8 228.6 2.0 29.3 13 1565 06 22 00 06 32 30 --- 17 44 56 51.6 232.0 2.1 31.0 630 1606 06 22 01 06 33 00 J1532+2344 17 45 26 51.5 233.0 2.2 31.5 12 1606 06 33 00 06 34 00 =1530+239 17 46 26 51.3 233.3 2.2 31.7 60 1610 06 33 01 06 34 00 J1532+2344 17 46 26 51.3 233.3 2.2 31.7 -2 1610 No stop 06 34 30 =1530+239 17 46 56 51.3 233.5 2.2 31.7 28 1612 06 34 01 06 34 59 ARP220 17 47 25 51.3 232.8 2.2 31.3 13 1612 06 34 59 06 45 29 --- 17 57 56 50.0 236.0 2.4 32.8 630 1652 06 35 00 06 45 58 J1532+2344 17 58 26 49.9 237.0 2.4 33.3 12 1652 06 45 58 06 46 58 =1530+239 17 59 26 49.7 237.3 2.4 33.4 60 1656 06 45 59 06 46 58 J1532+2344 17 59 26 49.7 237.3 2.4 33.4 -2 1656 No stop 06 47 28 =1530+239 17 59 56 49.7 237.4 2.4 33.5 28 1658 06 46 59 Schedule for DARNHALL (Code Da ) Page 8 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 06 47 57 ARP220 18 00 25 49.7 236.7 2.4 33.1 13 1658 06 47 57 06 58 27 --- 18 10 56 48.4 239.8 2.6 34.4 630 1698 06 47 58 06 58 56 J1532+2344 18 11 26 48.2 240.7 2.6 34.8 12 1698 06 58 56 07 00 26 =1530+239 18 12 56 48.0 241.2 2.7 35.0 90 1704 06 58 57 07 02 22 OQ208 18 14 52 39.1 266.4 4.1 42.8 18 1704 07 02 22 07 03 22 --- 18 15 53 38.9 266.6 4.1 42.8 60 1708 07 02 23 07 03 22 OQ208 18 15 53 38.9 266.6 4.1 42.8 -2 1708 No stop 07 07 22 --- 18 19 53 38.3 267.4 4.2 42.9 238 1724 07 03 23 07 09 13 J1532+2344 18 21 44 46.8 243.6 2.8 35.9 16 1724 07 09 13 07 10 13 =1530+239 18 22 44 46.7 243.9 2.8 36.0 60 1727 07 09 14 07 10 13 J1532+2344 18 22 44 46.7 243.9 2.8 36.0 -2 1727 No stop 07 10 43 =1530+239 18 23 15 46.6 244.0 2.8 36.0 28 1729 07 10 14 07 11 11 ARP220 18 23 43 46.7 243.3 2.8 35.7 13 1729 07 11 11 07 21 41 --- 18 34 14 45.2 246.1 3.0 36.7 630 1770 07 11 12 07 22 10 J1532+2344 18 34 43 45.1 247.0 3.0 37.1 12 1770 07 22 10 07 23 10 =1530+239 18 35 43 44.9 247.3 3.0 37.1 60 1774 07 22 11 07 23 10 J1532+2344 18 35 43 44.9 247.3 3.0 37.1 -2 1774 No stop 07 23 40 =1530+239 18 36 14 44.9 247.4 3.0 37.2 28 1776 07 23 11 07 24 08 ARP220 18 36 42 44.9 246.8 3.0 36.9 13 1776 07 24 08 07 34 38 --- 18 47 13 43.4 249.5 3.2 37.7 630 1816 07 24 09 07 35 06 J1532+2344 18 47 42 43.2 250.3 3.2 38.1 12 1816 07 35 06 07 36 06 =1530+239 18 48 42 43.1 250.6 3.2 38.1 60 1820 07 35 07 07 36 06 J1532+2344 18 48 42 43.1 250.6 3.2 38.1 -2 1820 No stop 07 36 36 =1530+239 18 49 12 43.0 250.7 3.3 38.2 28 1822 07 36 07 07 37 04 ARP220 18 49 40 43.1 250.1 3.2 37.9 13 1822 07 37 04 07 47 34 --- 19 00 12 41.6 252.6 3.4 38.6 630 1863 07 37 05 07 48 02 J1532+2344 19 00 40 41.4 253.5 3.4 38.9 12 1863 07 48 02 07 49 02 =1530+239 19 01 40 41.3 253.7 3.5 38.9 60 1867 07 48 03 07 49 02 J1532+2344 19 01 40 41.3 253.7 3.5 38.9 -2 1867 No stop 07 49 32 =1530+239 19 02 10 41.2 253.8 3.5 39.0 28 1869 07 49 03 Schedule for DARNHALL (Code Da ) Page 9 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 07 50 00 ARP220 19 02 38 41.3 253.2 3.4 38.7 13 1869 07 50 00 08 00 30 --- 19 13 10 39.7 255.7 3.6 39.3 630 1909 07 50 01 08 00 58 J1532+2344 19 13 38 39.5 256.5 3.7 39.5 13 1909 08 00 58 08 02 28 =1530+239 19 15 08 39.3 256.8 3.7 39.6 90 1915 08 00 59 08 04 10 OQ208 19 16 51 29.8 278.5 5.1 42.4 14 1915 08 04 10 08 05 10 --- 19 17 51 29.6 278.7 5.2 42.3 60 1919 08 04 11 08 05 10 OQ208 19 17 51 29.6 278.7 5.2 42.3 -2 1919 No stop 08 09 10 --- 19 21 52 29.0 279.5 5.2 42.2 238 1934 08 05 11 08 10 49 J1532+2344 19 23 30 38.1 258.7 3.8 39.9 13 1934 08 10 49 08 11 49 =1530+239 19 24 31 37.9 258.9 3.8 40.0 60 1938 08 10 50 08 11 49 J1532+2344 19 24 31 37.9 258.9 3.8 40.0 -2 1938 No stop 08 12 19 =1530+239 19 25 01 37.9 259.0 3.9 40.0 28 1940 08 11 50 08 12 46 ARP220 19 25 28 37.9 258.5 3.8 39.8 13 1940 08 12 46 08 23 16 --- 19 36 00 36.4 260.8 4.0 40.2 630 1981 08 12 47 08 23 44 J1532+2344 19 36 28 36.2 261.6 4.0 40.4 13 1981 08 23 44 08 24 44 =1530+239 19 37 28 36.0 261.8 4.1 40.4 60 1984 08 23 45 08 24 44 J1532+2344 19 37 28 36.0 261.8 4.1 40.4 -2 1984 No stop 08 25 14 =1530+239 19 37 58 35.9 261.9 4.1 40.4 28 1986 08 24 45 08 25 42 ARP220 19 38 25 36.0 261.3 4.0 40.2 13 1986 08 25 42 08 36 12 --- 19 48 57 34.5 263.6 4.2 40.5 630 2027 08 25 43 08 36 39 J1532+2344 19 49 25 34.2 264.3 4.3 40.6 13 2027 08 36 39 08 37 39 =1530+239 19 50 25 34.1 264.5 4.3 40.7 60 2031 08 36 40 08 37 39 J1532+2344 19 50 25 34.1 264.5 4.3 40.7 -2 2031 No stop 08 38 09 =1530+239 19 50 55 34.0 264.6 4.3 40.7 28 2033 08 37 40 08 38 37 ARP220 19 51 22 34.1 264.1 4.3 40.5 13 2033 08 38 37 08 49 07 --- 20 01 54 32.5 266.3 4.4 40.7 630 2073 08 38 38 08 49 34 J1532+2344 20 02 22 32.3 267.0 4.5 40.8 13 2073 08 49 34 08 50 34 =1530+239 20 03 22 32.2 267.2 4.5 40.8 60 2077 08 49 35 08 50 34 J1532+2344 20 03 22 32.2 267.2 4.5 40.8 -2 2077 No stop 08 51 04 =1530+239 20 03 52 32.1 267.3 4.5 40.8 28 2079 08 50 35 Schedule for DARNHALL (Code Da ) Page 10 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 08 51 31 ARP220 20 04 19 32.2 266.8 4.5 40.7 13 2079 08 51 31 09 02 01 --- 20 14 51 30.6 268.9 4.6 40.8 630 2120 08 51 32 09 02 29 J1532+2344 20 15 19 30.4 269.6 4.7 40.9 13 2120 09 02 29 09 03 59 =1530+239 20 16 49 30.1 269.9 4.7 40.9 90 2126 09 02 30 09 05 34 OQ208 20 18 24 20.9 289.8 6.2 39.9 13 2126 09 05 34 09 06 34 --- 20 19 24 20.7 290.0 6.2 39.8 60 2129 09 05 35 09 06 34 OQ208 20 19 24 20.7 290.0 6.2 39.8 -2 2129 No stop 09 10 34 --- 20 23 25 20.2 290.7 6.3 39.6 238 2145 09 06 35 09 12 06 J1532+2344 20 24 58 28.9 271.6 4.9 40.9 12 2145 09 12 06 09 13 06 =1530+239 20 25 58 28.8 271.8 4.9 40.9 60 2149 09 12 07 09 13 06 J1532+2344 20 25 58 28.8 271.8 4.9 40.9 -2 2149 No stop 09 13 36 =1530+239 20 26 28 28.7 271.9 4.9 40.9 28 2151 09 13 07 09 14 03 ARP220 20 26 55 28.8 271.3 4.8 40.8 13 2151 09 14 03 09 24 33 --- 20 37 27 27.2 273.4 5.0 40.7 630 2191 09 14 04 09 25 00 J1532+2344 20 37 54 27.0 274.1 5.1 40.8 13 2191 09 25 00 09 26 00 =1530+239 20 38 54 26.8 274.3 5.1 40.8 60 2195 09 25 01 09 26 00 J1532+2344 20 38 54 26.8 274.3 5.1 40.8 -2 2195 No stop 09 26 30 =1530+239 20 39 24 26.8 274.4 5.1 40.7 28 2197 09 26 01 09 26 57 ARP220 20 39 51 26.8 273.9 5.1 40.7 13 2197 09 26 57 09 37 27 --- 20 50 23 25.3 275.9 5.2 40.5 630 2238 09 26 58 09 37 55 J1532+2344 20 50 50 25.0 276.6 5.3 40.6 13 2238 09 37 55 09 38 55 =1530+239 20 51 51 24.9 276.8 5.3 40.5 60 2241 09 37 56 09 38 55 J1532+2344 20 51 51 24.9 276.8 5.3 40.5 -2 2241 No stop 09 39 25 =1530+239 20 52 21 24.8 276.9 5.3 40.5 28 2243 09 38 56 09 39 52 ARP220 20 52 48 24.9 276.4 5.3 40.5 13 2243 09 39 52 09 50 22 --- 21 03 19 23.3 278.4 5.5 40.3 630 2284 09 39 53 09 50 49 J1532+2344 21 03 47 23.1 279.1 5.5 40.3 13 2284 09 50 49 09 51 49 =1530+239 21 04 47 23.0 279.3 5.5 40.2 60 2288 09 50 50 09 51 49 J1532+2344 21 04 47 23.0 279.3 5.5 40.2 -2 2288 No stop 09 52 19 =1530+239 21 05 17 22.9 279.3 5.5 40.2 28 2290 09 51 50 Schedule for DARNHALL (Code Da ) Page 11 18cm global VLBI observations of the starburst galaxy Arp 220 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 09 52 46 ARP220 21 05 44 23.0 278.9 5.5 40.2 13 2290 09 52 46 10 03 16 --- 21 16 16 21.4 280.9 5.7 39.9 630 2330 09 52 47 10 03 43 J1532+2344 21 16 43 21.2 281.5 5.7 39.9 13 2330 10 03 43 10 05 13 =1530+239 21 18 13 21.0 281.8 5.7 39.9 90 2336 10 03 44 10 07 31 OQ208 21 20 31 12.5 301.1 7.2 35.7 58 2336 10 07 31 10 08 31 --- 21 21 31 12.3 301.2 7.2 35.6 60 2340 10 07 32 10 08 31 OQ208 21 21 31 12.3 301.2 7.2 35.6 -2 2340 No stop 10 12 31 --- 21 25 32 11.8 302.0 7.3 35.3 238 2355 10 08 32 10 14 55 J1532+2344 21 27 57 19.6 283.6 5.9 39.5 66 2355 10 14 55 10 15 55 =1530+239 21 28 57 19.4 283.8 5.9 39.5 60 2359 10 14 56 10 15 55 J1532+2344 21 28 57 19.4 283.8 5.9 39.5 -2 2359 No stop 10 16 25 =1530+239 21 29 27 19.4 283.9 5.9 39.5 28 2361 10 15 56 10 16 40 ARP220 21 29 42 19.5 283.4 5.9 39.5 2 2361 10 16 40 10 27 10 --- 21 40 14 17.9 285.4 6.1 39.1 630 2402 10 16 41 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.L1024glob --- 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: 23 Station: DARNHALL Total bit rate: 512 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 2272.00 2272.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 9 BBC SB= L L IF = A1 B1 The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used with PCAL = off LO sum= 1626.00 1626.00 BBC fr= 646.00 646.00 Bandwd= 64.00 64.00 Matching frequency sets: 11 12 13 14 15 16 Track assignments are: track1= 1, 2 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 57.940194 0.00 23 40 07.75728 * 23 30 11.33000 23 25 18.96580 0.00 From catalog imbedded in main SCHED input file. * 3C286 13 28 49.657769 * 13 31 08.288061 13 32 13.487531 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 23 13.19246 0.16 1328+307 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1331+30 GSFC 2016a X/S astro solution, 269 observations. * OQ208 14 04 45.615156 * 14 07 00.394415 14 08 03.650024 0.24 J1407+2827 28 41 29.23515 * 28 27 14.69019 28 20 26.03181 0.35 1404+286 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1407+28 GSFC 2016a X/S astro solution, 68278 observations. 1514+197 15 14 40.985841 * 15 16 56.796164 15 18 00.065612 0.01 * J1516+1932 19 43 10.94247 * 19 32 12.99203 19 26 53.79356 0.02 J1516+19 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 4472 observations. 1530+239 15 30 36.092759 * 15 32 46.345214 15 33 47.008502 0.08 * J1532+2344 23 54 09.32913 * 23 44 05.26796 23 39 09.39949 0.14 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 171 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 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 12.250 1600.189 3C286 sess123.L1024glob 17 0.133 0.000 OQ208 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 1.500 188.550 J1516+1932 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 0.083 10.000 J1532+2344 sess123.L1024glob 1 2 3 4 5 6 7 8 9 10 11 17 + 2.183 275.621 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 117.8 3C286 140.6 OQ208 135.1 J1516+1932 122.6 J1532+2344 118.2 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