COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: 3.6cm global VLBI observations of the starburst galaxy Arp 220 Exp. Code: gv028b 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 exclude outer 3 stations for each arm. 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 exclude outer 3 stations on each arm, to get C-array synthesized beam size. EF: Gaps for pointing at: from end of scan 107 at 03:54:29 to beginning of scan 111 at 04:02:12 from end of scan 236 at 08:04:05 to beginning of scan 243 at 08:13:31 Schedule for TIANMA65 (Code T6 ) Page 2 3.6cm 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 ---------------------------------------------------------------------------------------- --- Wed 1 Mar 2023 Day 60 --- Next scan frequencies: 8272.00 8272.00 8272.00 8272.00 8336.00 8336.00 8336.00 8336.00 8400.00 8400.00 8400.00 8400.00 8464.00 8464.00 8464.00 8464.00 Next BBC frequencies: 172.00 172.00 172.00 172.00 236.00 236.00 236.00 236.00 300.00 300.00 300.00 300.00 364.00 364.00 364.00 364.00 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 23 30 00 J1516+1932 18 12 35 49.1 264.1 2.9 64.6 0 0 23 30 00 23 35 00 =1514+197 18 17 36 48.1 264.9 3.0 64.8 300 77 23 30 01 23 36 41 OQ208 18 19 17 36.1 284.2 4.2 70.6 52 77 23 36 41 23 41 41 --- 18 24 17 35.1 284.7 4.3 70.2 300 155 23 36 42 23 43 17 J1532+2344 18 25 54 51.3 269.8 2.9 69.2 29 155 23 43 17 23 44 17 =1530+239 18 26 54 51.1 269.9 2.9 69.2 60 170 23 43 18 23 44 44 ARP220 18 27 21 51.4 269.4 2.9 68.9 23 170 23 44 44 23 47 14 --- 18 29 51 50.9 269.7 2.9 68.9 150 209 23 44 45 23 47 41 J1532+2344 18 30 18 50.4 270.4 2.9 69.2 23 209 23 47 41 23 48 41 =1530+239 18 31 19 50.2 270.5 3.0 69.2 60 224 23 47 42 23 49 07 ARP220 18 31 45 50.4 269.9 2.9 68.9 23 224 23 49 07 23 51 37 --- 18 34 15 49.9 270.3 3.0 68.9 150 263 23 49 08 23 52 04 J1532+2344 18 34 42 49.4 270.9 3.0 69.2 23 263 23 52 04 23 53 04 =1530+239 18 35 43 49.2 271.0 3.0 69.2 60 278 23 52 05 23 53 30 ARP220 18 36 09 49.5 270.5 3.0 68.9 23 278 23 53 30 23 56 00 --- 18 38 39 49.0 270.8 3.0 68.9 150 317 23 53 31 23 56 27 J1532+2344 18 39 07 48.5 271.5 3.1 69.2 23 317 23 56 27 23 57 27 =1530+239 18 40 07 48.3 271.6 3.1 69.1 60 332 23 56 28 --- Start: Wed 1 Mar 2023 Day 60 -- Stop: Thu 2 Mar 2023 Day 61 --- 23 57 54 ARP220 18 40 33 48.6 271.0 3.1 68.9 23 332 23 57 54 00 00 24 --- 18 43 04 48.0 271.4 3.1 68.9 150 371 23 57 55 00 00 51 J1532+2344 18 43 31 47.5 272.0 3.2 69.1 23 371 00 00 51 00 01 51 =1530+239 18 44 31 47.3 272.1 3.2 69.1 60 386 00 00 52 00 02 17 ARP220 18 44 57 47.6 271.6 3.1 68.9 23 386 00 02 17 00 04 47 --- 18 47 28 47.1 271.9 3.2 68.9 150 425 00 02 18 Schedule for TIANMA65 (Code T6 ) Page 3 3.6cm 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 ---------------------------------------------------------------------------------------- --- Thu 2 Mar 2023 Day 61 --- 00 05 14 J1532+2344 18 47 55 46.6 272.5 3.2 69.1 23 425 00 05 14 00 06 14 =1530+239 18 48 55 46.4 272.6 3.3 69.0 60 441 00 05 15 00 06 40 ARP220 18 49 21 46.7 272.1 3.2 68.8 23 441 00 06 40 00 09 10 --- 18 51 52 46.1 272.4 3.3 68.8 150 479 00 06 41 00 09 37 J1532+2344 18 52 19 45.7 273.0 3.3 69.0 23 479 00 09 37 00 10 37 =1530+239 18 53 19 45.4 273.2 3.3 69.0 60 495 00 09 38 00 11 04 ARP220 18 53 45 45.7 272.7 3.3 68.8 23 495 00 11 04 00 13 34 --- 18 56 16 45.2 273.0 3.3 68.7 150 533 00 11 05 00 14 01 J1532+2344 18 56 43 44.7 273.6 3.4 68.9 23 533 00 14 01 00 15 01 =1530+239 18 57 43 44.5 273.7 3.4 68.9 60 549 00 14 02 00 15 27 ARP220 18 58 09 44.8 273.2 3.4 68.7 23 549 00 15 27 00 17 57 --- 19 00 40 44.3 273.5 3.4 68.7 150 587 00 15 28 00 18 24 J1532+2344 19 01 07 43.8 274.1 3.5 68.8 23 587 00 18 24 00 19 24 =1530+239 19 02 07 43.6 274.2 3.5 68.8 60 603 00 18 25 00 19 50 ARP220 19 02 33 43.9 273.7 3.4 68.6 23 603 00 19 50 00 22 20 --- 19 05 04 43.3 274.0 3.5 68.6 150 642 00 19 51 00 22 47 J1532+2344 19 05 31 42.8 274.6 3.5 68.7 23 642 00 22 47 00 23 47 =1530+239 19 06 31 42.6 274.7 3.5 68.7 60 657 00 22 48 00 24 14 ARP220 19 06 57 42.9 274.2 3.5 68.5 23 657 00 24 14 00 26 44 --- 19 09 28 42.4 274.5 3.6 68.5 150 696 00 24 15 00 27 11 J1532+2344 19 09 55 41.9 275.1 3.6 68.6 23 696 00 27 11 00 28 11 =1530+239 19 10 55 41.7 275.2 3.6 68.6 60 711 00 27 12 00 28 37 ARP220 19 11 22 42.0 274.7 3.6 68.5 23 711 00 28 37 00 31 07 --- 19 13 52 41.4 275.0 3.6 68.4 150 750 00 28 38 00 31 34 J1532+2344 19 14 19 41.0 275.6 3.7 68.5 23 750 00 31 34 00 32 34 =1530+239 19 15 19 40.8 275.7 3.7 68.5 60 765 00 31 35 00 33 00 ARP220 19 15 46 41.0 275.2 3.7 68.3 23 765 00 33 00 00 35 30 --- 19 18 16 40.5 275.5 3.7 68.3 150 804 00 33 01 00 35 57 J1532+2344 19 18 43 40.0 276.0 3.7 68.4 23 804 00 35 57 00 36 57 =1530+239 19 19 43 39.8 276.2 3.8 68.4 60 819 00 35 58 Schedule for TIANMA65 (Code T6 ) Page 4 3.6cm 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 ---------------------------------------------------------------------------------------- --- Thu 2 Mar 2023 Day 61 --- 00 38 34 OQ208 19 21 20 23.4 290.0 5.2 66.1 29 819 00 38 34 00 43 34 --- 19 26 21 22.4 290.5 5.3 65.7 300 897 00 38 35 00 45 08 J1532+2344 19 27 56 38.1 277.1 3.9 68.1 30 897 00 45 08 00 46 08 =1530+239 19 28 56 37.9 277.2 3.9 68.1 60 912 00 45 09 00 46 35 ARP220 19 29 22 38.1 276.7 3.9 68.0 23 912 00 46 35 00 49 05 --- 19 31 53 37.6 277.0 3.9 67.9 150 951 00 46 36 00 49 32 J1532+2344 19 32 20 37.1 277.5 4.0 67.9 23 951 00 49 32 00 50 32 =1530+239 19 33 20 36.9 277.6 4.0 67.9 60 966 00 49 33 00 50 58 ARP220 19 33 46 37.2 277.2 4.0 67.8 23 966 00 50 58 00 53 28 --- 19 36 17 36.7 277.5 4.0 67.7 150 1005 00 50 59 00 53 55 J1532+2344 19 36 44 36.2 278.0 4.0 67.8 23 1005 00 53 55 00 54 55 =1530+239 19 37 44 36.0 278.1 4.1 67.7 60 1020 00 53 56 00 55 21 ARP220 19 38 10 36.3 277.7 4.0 67.7 23 1020 00 55 21 00 57 51 --- 19 40 41 35.7 277.9 4.1 67.6 150 1059 00 55 22 00 58 18 J1532+2344 19 41 07 35.3 278.5 4.1 67.6 23 1059 00 58 18 00 59 18 =1530+239 19 42 08 35.1 278.6 4.1 67.6 60 1074 00 58 19 00 59 44 ARP220 19 42 34 35.3 278.1 4.1 67.5 23 1074 00 59 44 01 02 14 --- 19 45 04 34.8 278.4 4.2 67.4 150 1113 00 59 45 01 02 41 J1532+2344 19 45 31 34.3 278.9 4.2 67.4 23 1113 01 02 41 01 03 41 =1530+239 19 46 32 34.1 279.0 4.2 67.4 60 1128 01 02 42 01 04 08 ARP220 19 46 58 34.4 278.6 4.2 67.3 23 1128 01 04 08 01 06 38 --- 19 49 28 33.9 278.9 4.2 67.2 150 1167 01 04 09 01 07 04 J1532+2344 19 49 55 33.4 279.4 4.3 67.3 23 1167 01 07 04 01 08 04 =1530+239 19 50 56 33.2 279.5 4.3 67.2 60 1183 01 07 05 01 08 31 ARP220 19 51 22 33.5 279.1 4.3 67.2 23 1183 01 08 31 01 11 01 --- 19 53 52 32.9 279.3 4.3 67.1 150 1221 01 08 32 01 11 28 J1532+2344 19 54 19 32.5 279.9 4.3 67.1 23 1221 01 11 28 01 12 28 =1530+239 19 55 19 32.3 280.0 4.4 67.0 60 1237 01 11 29 01 12 54 ARP220 19 55 46 32.5 279.5 4.3 67.0 23 1237 01 12 54 01 15 24 --- 19 58 16 32.0 279.8 4.4 66.9 150 1275 01 12 55 Schedule for TIANMA65 (Code T6 ) Page 5 3.6cm 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 ---------------------------------------------------------------------------------------- --- Thu 2 Mar 2023 Day 61 --- 01 15 51 J1532+2344 19 58 43 31.6 280.3 4.4 66.9 23 1275 01 15 51 01 16 51 =1530+239 19 59 43 31.3 280.4 4.4 66.8 60 1291 01 15 52 01 17 17 ARP220 20 00 10 31.6 280.0 4.4 66.8 23 1291 01 17 17 01 19 47 --- 20 02 40 31.1 280.3 4.4 66.7 150 1329 01 17 18 01 20 14 J1532+2344 20 03 07 30.6 280.8 4.5 66.7 23 1329 01 20 14 01 21 14 =1530+239 20 04 07 30.4 280.9 4.5 66.6 60 1345 01 20 15 01 21 40 ARP220 20 04 34 30.7 280.5 4.5 66.6 23 1345 01 21 40 01 24 10 --- 20 07 04 30.2 280.7 4.5 66.5 150 1384 01 21 41 01 24 37 J1532+2344 20 07 31 29.7 281.3 4.6 66.5 23 1384 01 24 37 01 25 37 =1530+239 20 08 31 29.5 281.4 4.6 66.4 60 1399 01 24 38 01 26 03 ARP220 20 08 57 29.8 280.9 4.5 66.4 23 1399 01 26 03 01 28 33 --- 20 11 28 29.2 281.2 4.6 66.3 150 1438 01 26 04 01 29 00 J1532+2344 20 11 55 28.8 281.7 4.6 66.3 23 1438 01 29 00 01 30 00 =1530+239 20 12 55 28.6 281.8 4.7 66.2 60 1453 01 29 01 01 30 26 ARP220 20 13 21 28.8 281.4 4.6 66.2 23 1453 01 30 26 01 32 56 --- 20 15 52 28.3 281.7 4.7 66.1 150 1492 01 30 27 01 33 23 J1532+2344 20 16 18 27.9 282.2 4.7 66.0 23 1492 01 33 23 01 34 23 =1530+239 20 17 19 27.7 282.3 4.7 66.0 60 1507 01 33 24 01 34 49 ARP220 20 17 45 27.9 281.9 4.7 66.0 23 1507 01 34 49 01 37 19 --- 20 20 15 27.4 282.1 4.7 65.8 150 1546 01 34 50 01 37 46 J1532+2344 20 20 42 26.9 282.7 4.8 65.8 23 1546 01 37 46 01 38 46 =1530+239 20 21 42 26.7 282.8 4.8 65.8 60 1561 01 37 47 01 40 22 OQ208 20 23 19 11.2 296.4 6.3 60.6 33 1561 01 40 22 01 45 22 --- 20 28 20 10.3 297.0 6.3 60.1 300 1639 01 40 23 01 46 59 J1532+2344 20 29 57 25.0 283.6 4.9 65.3 35 1639 01 46 59 01 47 59 =1530+239 20 30 57 24.8 283.7 5.0 65.3 60 1654 01 47 00 01 48 25 ARP220 20 31 23 25.1 283.3 4.9 65.2 23 1654 01 48 25 01 50 55 --- 20 33 53 24.6 283.6 5.0 65.1 150 1693 01 48 26 01 51 22 J1532+2344 20 34 20 24.1 284.1 5.0 65.1 23 1693 01 51 22 01 52 22 =1530+239 20 35 20 23.9 284.2 5.0 65.0 60 1708 01 51 23 Schedule for TIANMA65 (Code T6 ) Page 6 3.6cm 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 ---------------------------------------------------------------------------------------- --- Thu 2 Mar 2023 Day 61 --- 01 52 48 ARP220 20 35 47 24.2 283.8 5.0 65.0 23 1708 01 52 48 01 55 18 --- 20 38 17 23.6 284.0 5.0 64.9 150 1747 01 52 49 01 55 45 J1532+2344 20 38 44 23.2 284.6 5.1 64.8 23 1747 01 55 45 01 56 45 =1530+239 20 39 44 23.0 284.7 5.1 64.7 60 1762 01 55 46 01 57 11 ARP220 20 40 10 23.2 284.3 5.1 64.8 23 1762 01 57 11 01 59 41 --- 20 42 41 22.7 284.5 5.1 64.6 150 1801 01 57 12 02 00 08 J1532+2344 20 43 07 22.3 285.0 5.2 64.5 23 1801 02 00 08 02 01 08 =1530+239 20 44 07 22.1 285.1 5.2 64.5 60 1816 02 00 09 02 01 34 ARP220 20 44 34 22.3 284.7 5.1 64.5 23 1816 02 01 34 02 04 04 --- 20 47 04 21.8 285.0 5.2 64.4 150 1855 02 01 35 02 04 30 J1532+2344 20 47 31 21.4 285.5 5.2 64.3 23 1855 02 04 30 02 05 30 =1530+239 20 48 31 21.2 285.6 5.2 64.2 60 1870 02 04 31 02 05 57 ARP220 20 48 57 21.4 285.2 5.2 64.2 23 1870 02 05 57 02 08 27 --- 20 51 27 20.9 285.5 5.3 64.1 150 1909 02 05 58 02 08 53 J1532+2344 20 51 54 20.5 286.0 5.3 64.0 23 1909 02 08 53 02 09 53 =1530+239 20 52 54 20.3 286.1 5.3 63.9 60 1925 02 08 54 02 10 19 ARP220 20 53 20 20.5 285.7 5.3 64.0 23 1925 02 10 19 02 12 49 --- 20 55 51 20.0 285.9 5.3 63.8 150 1963 02 10 20 02 13 16 J1532+2344 20 56 18 19.6 286.4 5.4 63.7 23 1963 02 13 16 02 14 16 =1530+239 20 57 18 19.4 286.5 5.4 63.7 60 1979 02 13 17 02 14 42 ARP220 20 57 44 19.6 286.1 5.4 63.7 23 1979 02 14 42 02 17 12 --- 21 00 14 19.1 286.4 5.4 63.5 150 2017 02 14 43 02 17 38 J1532+2344 21 00 41 18.7 286.9 5.4 63.4 23 2017 02 17 38 02 18 38 =1530+239 21 01 41 18.5 287.0 5.5 63.4 60 2033 02 17 39 02 19 05 ARP220 21 02 07 18.7 286.6 5.4 63.4 23 2033 02 19 05 02 21 35 --- 21 04 38 18.2 286.9 5.5 63.3 150 2071 02 19 06 02 22 01 J1532+2344 21 05 05 17.8 287.4 5.5 63.1 23 2071 02 22 01 02 23 01 =1530+239 21 06 05 17.6 287.5 5.5 63.1 60 2087 02 22 02 02 23 27 ARP220 21 06 31 17.8 287.1 5.5 63.1 23 2087 02 23 27 02 25 57 --- 21 09 01 17.3 287.4 5.6 63.0 150 2126 02 23 28 Schedule for TIANMA65 (Code T6 ) Page 7 3.6cm 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 ---------------------------------------------------------------------------------------- --- Thu 2 Mar 2023 Day 61 --- 02 26 24 J1532+2344 21 09 28 16.9 287.9 5.6 62.9 24 2126 02 26 24 02 27 24 =1530+239 21 10 29 16.7 288.0 5.6 62.8 60 2141 02 26 25 02 27 50 ARP220 21 10 55 16.9 287.6 5.6 62.8 23 2141 02 27 50 02 30 20 --- 21 13 25 16.4 287.8 5.6 62.7 150 2180 02 27 51 02 30 48 J1532+2344 21 13 52 16.0 288.3 5.7 62.5 24 2180 02 30 48 02 31 48 =1530+239 21 14 52 15.8 288.5 5.7 62.5 60 2195 02 30 49 02 32 14 ARP220 21 15 19 16.0 288.0 5.7 62.5 23 2195 02 32 14 02 34 44 --- 21 17 49 15.5 288.3 5.7 62.4 150 2234 02 32 15 02 35 11 J1532+2344 21 18 16 15.1 288.8 5.7 62.2 24 2234 02 35 11 02 36 11 =1530+239 21 19 17 14.9 288.9 5.8 62.2 60 2249 02 35 12 02 36 37 ARP220 21 19 43 15.1 288.5 5.7 62.2 23 2249 02 36 37 02 39 07 --- 21 22 13 14.6 288.8 5.8 62.1 150 2288 02 36 38 02 39 35 J1532+2344 21 22 41 14.2 289.3 5.8 61.9 24 2288 02 39 35 02 40 35 =1530+239 21 23 41 14.0 289.4 5.8 61.8 60 2303 02 39 36 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.X2048glob --- 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: 22 Station: TIANMA65 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= 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 8100.00 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 5 1 5 2 6 2 6 3 7 3 7 4 8 4 8 BBC SB= L L U U L L U U L L U U L L U U IF = A2 B1 A2 B1 A2 B1 A2 B1 A2 B1 A2 B1 A2 B1 A2 B1 The following frequency sets based on these setups were used. Frequency Set: 6 Setup file default. Used with PCAL = off LO sum= 8272.00 8272.00 8272.00 8272.00 8336.00 8336.00 8336.00 8336.00 8400.00 8400.00 8400.00 8400.00 8464.00 8464.00 8464.00 8464.00 BBC fr= 172.00 172.00 172.00 172.00 236.00 236.00 236.00 236.00 300.00 300.00 300.00 300.00 364.00 364.00 364.00 364.00 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: 6 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 57.638290 0.00 23 40 07.75728 * 23 30 11.33000 23 25 19.02820 0.00 From catalog imbedded in main SCHED input file. * 3C286 13 28 49.657769 * 13 31 08.288061 13 32 13.263724 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 23 12.26523 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 03.396716 0.24 J1407+2827 28 41 29.23515 * 28 27 14.69019 28 20 25.40174 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 17 59.778756 0.01 * J1516+1932 19 43 10.94247 * 19 32 12.99203 19 26 53.88295 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 46.707178 0.08 * J1532+2344 23 54 09.32913 * 23 44 05.26796 23 39 09.44313 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.X2048glob 1 2 3 4 5 6 7 8 9 10 12 13 + 7.808 670.409 3C286 sess123.X2048glob 13 0.133 0.000 OQ208 sess123.X2048glob 1 2 3 4 5 6 7 8 9 10 12 13 + 1.504 118.536 J1516+1932 sess123.X2048glob 1 2 3 4 5 6 7 8 9 10 12 0.083 5.500 J1532+2344 sess123.X2048glob 1 2 3 4 5 6 7 8 9 10 12 13 + 5.125 433.102 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 110.2 3C286 135.9 OQ208 129.2 J1516+1932 114.5 J1532+2344 110.7 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