COVER INFORMATION Station: KVNTN (Code Kt ) Experiment: Study of a potential gravitational lens system at milliarcsecond scales Exp. Code: EA075 Schedule Version: 3.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Diego Alvarez-Ortega Address: Institute of Astrophysics - FORTH N. Plastira 100 Vassilika Vouton Greece Phone: +302810394236 EMAIL: dalvarez@physics.uoc.gr Fax: Phone during observation: +34615500245 Observing mode: vlbi Notes: COVER LETTER: Schedule for KVNTN (Code Kt ) Page 2 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- Next scan frequencies: 22056.00 22056.00 22184.00 22184.00 22312.00 22312.00 22440.00 22440.00 22056.00 22056.00 22184.00 22184.00 22312.00 22312.00 22440.00 22440.00 Next BBC frequencies: 11944.00 11944.00 11816.00 11816.00 11688.00 11688.00 11560.00 11560.00 11944.00 11944.00 11816.00 11816.00 11688.00 11688.00 11560.00 11560.00 Next scan bandwidths: 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 19 00 00 J1159+2914 14 53 26 53.1 -84.6 2.9 72.3 0 0 19 00 00 19 02 00 =1156+295 14 55 27 52.7 -84.3 2.9 72.2 120 62 19 00 01 19 04 00 1146+189 14 57 27 45.7 262.6 3.1 61.0 -1 62 19 04 00 19 05 10 --- 14 58 37 45.5 262.8 3.1 61.0 69 98 19 04 01 19 05 10 J1143+1834 14 58 37 44.4 263.5 3.2 61.1 -3 98 No stop 19 06 40 --- 15 00 07 44.1 263.8 3.3 61.2 87 144 19 05 11 19 06 40 1146+189 15 00 07 45.2 263.0 3.2 61.1 -3 144 No stop 19 08 10 --- 15 01 38 44.9 263.3 3.2 61.1 87 191 19 06 41 19 08 10 J1143+1834 15 01 38 43.7 264.0 3.3 61.2 -3 191 No stop 19 09 40 --- 15 03 08 43.4 264.2 3.3 61.2 87 237 19 08 11 19 10 10 1146+189 15 03 38 44.5 263.6 3.2 61.2 27 237 19 10 10 19 11 10 --- 15 04 38 44.2 263.8 3.2 61.2 60 268 19 10 11 19 11 10 J1143+1834 15 04 38 43.1 264.5 3.3 61.3 -3 268 No stop 19 12 40 --- 15 06 08 42.8 264.7 3.4 61.3 87 314 19 11 11 19 12 40 1146+189 15 06 08 43.9 264.0 3.3 61.3 -3 314 No stop 19 14 10 --- 15 07 39 43.6 264.2 3.3 61.3 87 361 19 12 41 19 14 10 J1143+1834 15 07 39 42.5 264.9 3.4 61.4 -3 361 No stop 19 15 40 --- 15 09 09 42.2 265.2 3.4 61.4 87 407 19 14 11 19 16 10 1146+189 15 09 39 43.2 264.5 3.3 61.4 27 407 19 16 10 19 17 10 --- 15 10 39 43.0 264.7 3.3 61.4 60 438 19 16 11 19 17 10 J1143+1834 15 10 39 41.9 265.4 3.4 61.4 -3 438 No stop 19 18 40 --- 15 12 09 41.6 265.6 3.5 61.5 87 484 19 17 11 19 18 40 1146+189 15 12 09 42.7 264.9 3.4 61.4 -3 484 No stop 19 20 10 --- 15 13 40 42.4 265.2 3.4 61.5 87 531 19 18 41 19 20 10 J1143+1834 15 13 40 41.2 265.8 3.5 61.5 -3 531 No stop 19 21 40 --- 15 15 10 40.9 266.1 3.5 61.5 87 577 19 20 11 Schedule for KVNTN (Code Kt ) Page 3 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 19 22 10 1146+189 15 15 40 41.9 265.5 3.4 61.5 27 577 19 22 10 19 23 10 --- 15 16 40 41.7 265.6 3.4 61.5 60 608 19 22 11 19 23 10 J1143+1834 15 16 40 40.6 266.3 3.5 61.6 -3 608 No stop 19 24 40 --- 15 18 10 40.3 266.5 3.6 61.6 87 654 19 23 11 19 24 40 1146+189 15 18 10 41.4 265.9 3.5 61.6 -3 654 No stop 19 26 10 --- 15 19 40 41.1 266.1 3.5 61.6 87 701 19 24 41 19 26 10 J1143+1834 15 19 40 40.0 266.7 3.6 61.6 -3 701 No stop 19 27 40 --- 15 21 11 39.7 267.0 3.6 61.6 87 747 19 26 11 19 28 10 1146+189 15 21 41 40.7 266.4 3.5 61.6 27 747 19 28 10 19 29 10 --- 15 22 41 40.5 266.5 3.5 61.6 60 778 19 28 11 19 29 10 J1143+1834 15 22 41 39.4 267.2 3.6 61.7 -3 778 No stop 19 30 40 --- 15 24 11 39.0 267.4 3.7 61.7 87 824 19 29 11 19 30 40 1146+189 15 24 11 40.2 266.7 3.6 61.7 -3 824 No stop 19 32 10 --- 15 25 41 39.9 267.0 3.6 61.7 87 871 19 30 41 19 32 10 J1143+1834 15 25 41 38.7 267.6 3.7 61.7 -3 871 No stop 19 33 40 --- 15 27 12 38.4 267.8 3.7 61.7 87 917 19 32 11 19 34 10 1146+189 15 27 42 39.4 267.3 3.6 61.7 27 917 19 34 10 19 35 10 --- 15 28 42 39.2 267.4 3.6 61.7 60 948 19 34 11 19 35 10 J1143+1834 15 28 42 38.1 268.1 3.7 61.7 -3 948 No stop 19 36 40 --- 15 30 12 37.8 268.3 3.8 61.7 87 994 19 35 11 19 36 40 1146+189 15 30 12 38.9 267.6 3.7 61.7 -3 994 No stop 19 38 10 --- 15 31 42 38.6 267.8 3.7 61.8 87 1041 19 36 41 19 38 10 J1143+1834 15 31 42 37.5 268.5 3.8 61.7 -3 1041 No stop 19 39 40 --- 15 33 13 37.2 268.7 3.8 61.8 87 1087 19 38 11 19 40 10 1146+189 15 33 43 38.2 268.1 3.7 61.8 27 1087 19 40 10 19 41 10 --- 15 34 43 38.0 268.3 3.7 61.8 60 1118 19 40 11 19 41 10 J1143+1834 15 34 43 36.8 268.9 3.8 61.8 -3 1118 No stop 19 42 40 --- 15 36 13 36.5 269.1 3.9 61.8 87 1165 19 41 11 19 42 40 1146+189 15 36 13 37.7 268.5 3.8 61.8 -3 1165 No stop 19 44 10 --- 15 37 43 37.3 268.7 3.8 61.8 87 1211 19 42 41 Schedule for KVNTN (Code Kt ) Page 4 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 19 44 10 J1143+1834 15 37 43 36.2 269.3 3.9 61.8 -3 1211 No stop 19 45 40 --- 15 39 14 35.9 269.5 3.9 61.8 87 1257 19 44 11 19 46 10 1146+189 15 39 44 36.9 269.0 3.8 61.8 27 1257 19 46 10 19 47 10 --- 15 40 44 36.7 269.1 3.8 61.8 60 1288 19 46 11 19 47 10 J1143+1834 15 40 44 35.6 269.7 3.9 61.8 -3 1288 No stop 19 48 40 --- 15 42 14 35.3 269.9 4.0 61.8 87 1335 19 47 11 19 48 40 1146+189 15 42 14 36.4 269.3 3.9 61.8 -3 1335 No stop 19 50 10 --- 15 43 44 36.1 269.5 3.9 61.8 87 1381 19 48 41 19 50 10 J1143+1834 15 43 44 35.0 270.2 4.0 61.8 -3 1381 No stop 19 51 40 --- 15 45 15 34.6 270.4 4.0 61.8 87 1427 19 50 11 19 52 10 1146+189 15 45 45 35.7 269.8 3.9 61.8 27 1427 19 52 10 19 53 10 --- 15 46 45 35.5 270.0 3.9 61.8 60 1458 19 52 11 19 53 10 J1143+1834 15 46 45 34.3 270.6 4.0 61.8 -3 1458 No stop 19 54 40 --- 15 48 15 34.0 270.8 4.1 61.8 87 1505 19 53 11 19 54 40 1146+189 15 48 15 35.1 270.2 4.0 61.8 -3 1505 No stop 19 56 10 --- 15 49 45 34.8 270.4 4.0 61.8 87 1551 19 54 41 19 56 10 J1143+1834 15 49 45 33.7 271.0 4.1 61.8 -3 1551 No stop 19 57 40 --- 15 51 16 33.4 271.2 4.1 61.8 87 1597 19 56 11 19 58 10 1146+189 15 51 46 34.4 270.6 4.0 61.8 27 1597 19 58 10 19 59 10 --- 15 52 46 34.2 270.8 4.0 61.8 60 1628 19 58 11 19 59 10 J1143+1834 15 52 46 33.1 271.4 4.1 61.8 -3 1628 No stop 20 00 40 --- 15 54 16 32.8 271.6 4.2 61.7 87 1675 19 59 11 20 00 40 1146+189 15 54 16 33.9 271.0 4.1 61.8 -3 1675 No stop 20 02 10 --- 15 55 46 33.6 271.2 4.1 61.8 87 1721 20 00 41 20 02 10 J1143+1834 15 55 46 32.4 271.8 4.2 61.7 -3 1721 No stop 20 03 40 --- 15 57 17 32.1 272.0 4.2 61.7 87 1767 20 02 11 20 04 10 1146+189 15 57 47 33.2 271.4 4.1 61.8 27 1767 20 04 10 20 05 10 --- 15 58 47 32.9 271.6 4.1 61.8 60 1798 20 04 11 20 05 10 J1143+1834 15 58 47 31.8 272.2 4.2 61.7 -3 1798 No stop 20 06 40 --- 16 00 17 31.5 272.4 4.3 61.7 87 1845 20 05 11 Schedule for KVNTN (Code Kt ) Page 5 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 20 06 40 1146+189 16 00 17 32.6 271.8 4.2 61.8 -3 1845 No stop 20 08 10 --- 16 01 47 32.3 272.0 4.2 61.8 87 1891 20 06 41 20 08 10 J1143+1834 16 01 47 31.2 272.6 4.3 61.7 -3 1891 No stop 20 09 40 --- 16 03 18 30.9 272.8 4.3 61.7 87 1937 20 08 11 20 10 10 1146+189 16 03 48 31.9 272.2 4.2 61.8 27 1937 20 10 10 20 11 10 --- 16 04 48 31.7 272.4 4.2 61.7 60 1968 20 10 11 20 11 10 J1143+1834 16 04 48 30.6 273.0 4.3 61.6 -3 1968 No stop 20 12 40 --- 16 06 18 30.2 273.2 4.4 61.6 87 2015 20 11 11 20 12 40 1146+189 16 06 18 31.4 272.6 4.3 61.7 -3 2015 No stop 20 14 10 --- 16 07 48 31.1 272.8 4.3 61.7 87 2061 20 12 41 20 14 10 J1143+1834 16 07 48 29.9 273.4 4.4 61.6 -3 2061 No stop 20 15 40 --- 16 09 19 29.6 273.6 4.4 61.6 87 2107 20 14 11 20 16 10 1146+189 16 09 49 30.6 273.0 4.3 61.7 27 2107 20 16 10 20 17 10 --- 16 10 49 30.4 273.2 4.3 61.7 60 2138 20 16 11 20 17 10 J1143+1834 16 10 49 29.3 273.7 4.4 61.6 -3 2138 No stop 20 18 40 --- 16 12 19 29.0 273.9 4.5 61.5 87 2185 20 17 11 20 18 40 1146+189 16 12 19 30.1 273.4 4.4 61.7 -3 2185 No stop 20 20 10 --- 16 13 49 29.8 273.6 4.4 61.6 87 2231 20 18 41 20 20 10 J1143+1834 16 13 49 28.7 274.1 4.5 61.5 -3 2231 No stop 20 21 40 --- 16 15 20 28.4 274.3 4.5 61.5 87 2278 20 20 11 20 22 10 1146+189 16 15 50 29.4 273.8 4.4 61.6 27 2278 20 22 10 20 23 10 --- 16 16 50 29.2 273.9 4.4 61.6 60 2308 20 22 11 20 23 10 J1143+1834 16 16 50 28.1 274.5 4.5 61.5 -3 2308 No stop 20 24 40 --- 16 18 20 27.7 274.7 4.6 61.4 87 2355 20 23 11 20 24 40 1146+189 16 18 20 28.9 274.1 4.5 61.6 -3 2355 No stop 20 26 10 --- 16 19 50 28.6 274.3 4.5 61.5 87 2401 20 24 41 20 26 10 J1143+1834 16 19 50 27.4 274.9 4.6 61.4 -3 2401 No stop 20 27 40 --- 16 21 21 27.1 275.1 4.6 61.4 87 2448 20 26 11 20 28 10 1146+189 16 21 51 28.1 274.6 4.5 61.5 27 2448 20 28 10 20 29 10 --- 16 22 51 27.9 274.7 4.5 61.5 60 2478 20 28 11 Schedule for KVNTN (Code Kt ) Page 6 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 20 29 10 J1143+1834 16 22 51 26.8 275.3 4.6 61.3 -3 2478 No stop 20 30 40 --- 16 24 21 26.5 275.5 4.7 61.3 87 2525 20 29 11 20 30 40 1146+189 16 24 21 27.6 274.9 4.6 61.4 -3 2525 No stop 20 32 10 --- 16 25 51 27.3 275.1 4.6 61.4 87 2571 20 30 41 20 32 10 J1143+1834 16 25 51 26.2 275.7 4.7 61.3 -3 2571 No stop 20 33 40 --- 16 27 22 25.9 275.9 4.7 61.2 87 2618 20 32 11 20 34 10 1146+189 16 27 52 26.9 275.4 4.6 61.4 27 2618 20 34 10 20 35 10 --- 16 28 52 26.7 275.5 4.6 61.4 60 2649 20 34 11 20 35 10 J1143+1834 16 28 52 25.5 276.1 4.7 61.2 -3 2649 No stop 20 36 40 --- 16 30 22 25.2 276.3 4.8 61.2 87 2695 20 35 11 20 36 40 1146+189 16 30 22 26.4 275.7 4.7 61.3 -3 2695 No stop 20 38 10 --- 16 31 52 26.0 275.9 4.7 61.3 87 2741 20 36 41 20 38 10 J1143+1834 16 31 52 24.9 276.4 4.8 61.1 -3 2741 No stop 20 39 40 --- 16 33 23 24.6 276.6 4.8 61.1 87 2788 20 38 11 20 40 10 1146+189 16 33 53 25.6 276.1 4.7 61.2 27 2788 20 40 10 20 41 10 --- 16 34 53 25.4 276.3 4.7 61.2 60 2819 20 40 11 20 41 10 J1143+1834 16 34 53 24.3 276.8 4.8 61.0 -3 2819 No stop 20 42 40 --- 16 36 23 24.0 277.0 4.9 61.0 87 2865 20 41 11 20 42 40 1146+189 16 36 23 25.1 276.4 4.8 61.2 -3 2865 No stop 20 44 10 --- 16 37 53 24.8 276.6 4.8 61.1 87 2911 20 42 41 20 44 10 J1143+1834 16 37 53 23.7 277.2 4.9 61.0 -3 2911 No stop 20 45 40 --- 16 39 24 23.4 277.4 4.9 60.9 87 2958 20 44 11 20 46 10 1146+189 16 39 54 24.4 276.9 4.8 61.1 27 2958 20 46 10 20 47 10 --- 16 40 54 24.2 277.0 4.8 61.0 60 2989 20 46 11 20 47 10 J1143+1834 16 40 54 23.1 277.6 4.9 60.9 -3 2989 No stop 20 48 40 --- 16 42 24 22.7 277.8 5.0 60.8 87 3035 20 47 11 20 48 40 1146+189 16 42 24 23.9 277.2 4.9 61.0 -3 3035 No stop 20 50 10 --- 16 43 54 23.5 277.4 4.9 61.0 87 3081 20 48 41 20 50 10 J1143+1834 16 43 54 22.4 278.0 5.0 60.8 -3 3081 No stop 20 51 40 --- 16 45 25 22.1 278.1 5.0 60.7 87 3128 20 50 11 Schedule for KVNTN (Code Kt ) Page 7 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 20 52 10 1146+189 16 45 55 23.1 277.6 4.9 60.9 27 3128 20 52 10 20 53 10 --- 16 46 55 22.9 277.8 5.0 60.9 60 3159 20 52 11 ---------- fringe finder & EF pointing ---------- 21 01 10 J1159+2914 16 54 56 28.3 287.9 4.9 65.6 474 3159 21 01 10 21 05 10 =1156+295 16 58 57 27.5 288.3 5.0 65.3 240 3282 21 01 11 21 06 20 1146+189 17 00 07 20.2 279.4 5.2 60.4 64 3282 21 06 20 21 07 30 --- 17 01 17 20.0 279.6 5.2 60.4 70 3318 21 06 21 21 07 30 J1143+1834 17 01 17 18.8 280.1 5.3 60.2 -3 3318 No stop 21 09 00 --- 17 02 47 18.5 280.3 5.3 60.1 87 3365 21 07 31 21 09 00 1146+189 17 02 47 19.6 279.7 5.2 60.3 -3 3365 No stop 21 10 30 --- 17 04 18 19.3 279.9 5.2 60.3 87 3411 21 09 01 21 10 30 J1143+1834 17 04 18 18.2 280.5 5.3 60.0 -3 3411 No stop 21 12 00 --- 17 05 48 17.9 280.7 5.4 60.0 87 3458 21 10 31 21 12 30 1146+189 17 06 18 18.9 280.2 5.3 60.2 27 3458 21 12 30 21 13 30 --- 17 07 18 18.7 280.3 5.3 60.2 60 3488 21 12 31 21 13 30 J1143+1834 17 07 18 17.6 280.9 5.4 59.9 -3 3488 No stop 21 15 00 --- 17 08 48 17.3 281.1 5.4 59.9 87 3535 21 13 31 21 15 00 1146+189 17 08 48 18.4 280.5 5.3 60.1 -3 3535 No stop 21 16 30 --- 17 10 19 18.1 280.7 5.3 60.0 87 3581 21 15 01 21 16 30 J1143+1834 17 10 19 17.0 281.2 5.4 59.8 -3 3581 No stop 21 18 00 --- 17 11 49 16.7 281.4 5.5 59.7 87 3628 21 16 31 21 18 30 1146+189 17 12 19 17.7 280.9 5.4 60.0 27 3628 21 18 30 21 19 30 --- 17 13 19 17.5 281.1 5.4 59.9 60 3658 21 18 31 21 19 30 J1143+1834 17 13 19 16.4 281.6 5.5 59.7 -3 3658 No stop 21 21 00 --- 17 14 49 16.1 281.8 5.5 59.6 87 3705 21 19 31 21 21 00 1146+189 17 14 49 17.2 281.2 5.4 59.8 -3 3705 No stop 21 22 30 --- 17 16 20 16.9 281.4 5.4 59.8 87 3751 21 21 01 21 22 30 J1143+1834 17 16 20 15.8 282.0 5.5 59.5 -3 3751 No stop 21 24 00 --- 17 17 50 15.5 282.2 5.6 59.5 87 3798 21 22 31 Schedule for KVNTN (Code Kt ) Page 8 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 21 24 30 1146+189 17 18 20 16.5 281.7 5.5 59.7 27 3798 21 24 30 21 25 30 --- 17 19 20 16.3 281.8 5.5 59.7 60 3829 21 24 31 21 25 30 J1143+1834 17 19 20 15.1 282.4 5.6 59.4 -3 3829 No stop 21 27 00 --- 17 20 50 14.8 282.6 5.6 59.3 87 3875 21 25 31 21 27 00 1146+189 17 20 50 15.9 282.0 5.5 59.6 -3 3875 No stop 21 28 30 --- 17 22 21 15.6 282.2 5.5 59.5 87 3921 21 27 01 21 28 30 J1143+1834 17 22 21 14.5 282.8 5.6 59.3 -3 3921 No stop 21 30 00 --- 17 23 51 14.2 282.9 5.7 59.2 87 3968 21 28 31 21 30 30 1146+189 17 24 21 15.2 282.4 5.6 59.4 27 3968 21 30 30 21 31 30 --- 17 25 21 15.0 282.6 5.6 59.4 60 3999 21 30 31 21 31 30 J1143+1834 17 25 21 13.9 283.1 5.7 59.1 -3 3999 No stop 21 33 00 --- 17 26 51 13.6 283.3 5.7 59.0 87 4045 21 31 31 21 33 00 1146+189 17 26 51 14.7 282.7 5.6 59.3 -3 4045 No stop 21 34 30 --- 17 28 22 14.4 282.9 5.6 59.2 87 4091 21 33 01 21 34 30 J1143+1834 17 28 22 13.3 283.5 5.7 59.0 -3 4091 No stop 21 36 00 --- 17 29 52 13.0 283.7 5.8 58.9 87 4138 21 34 31 21 36 30 1146+189 17 30 22 14.0 283.2 5.7 59.1 27 4138 21 36 30 21 37 30 --- 17 31 22 13.8 283.3 5.7 59.1 60 4169 21 36 31 21 37 30 J1143+1834 17 31 22 12.7 283.9 5.8 58.8 -3 4169 No stop 21 39 00 --- 17 32 52 12.4 284.1 5.8 58.7 87 4215 21 37 31 21 39 00 1146+189 17 32 52 13.5 283.5 5.7 59.0 -3 4215 No stop 21 40 30 --- 17 34 23 13.2 283.7 5.7 58.9 87 4261 21 39 01 21 40 30 J1143+1834 17 34 23 12.1 284.3 5.8 58.6 -3 4261 No stop 21 42 00 --- 17 35 53 11.8 284.5 5.9 58.6 87 4308 21 40 31 21 42 30 1146+189 17 36 23 12.8 283.9 5.8 58.8 27 4308 21 42 30 21 43 30 --- 17 37 23 12.6 284.1 5.8 58.8 60 4339 21 42 31 21 43 30 J1143+1834 17 37 23 11.5 284.6 5.9 58.5 -3 4339 No stop 21 45 00 --- 17 38 53 11.2 284.8 5.9 58.4 87 4385 21 43 31 21 45 00 1146+189 17 38 53 12.3 284.3 5.8 58.7 -3 4385 No stop 21 46 30 --- 17 40 24 12.0 284.5 5.8 58.6 87 4431 21 45 01 Schedule for KVNTN (Code Kt ) Page 9 Study of a potential gravitational lens system at milliarcsecond scales 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 13 Mar 2024 Day 73 --- 21 46 30 J1143+1834 17 40 24 10.9 285.0 5.9 58.3 -3 4431 No stop 21 48 00 --- 17 41 54 10.6 285.2 6.0 58.2 87 4478 21 46 31 21 48 30 1146+189 17 42 24 11.6 284.7 5.9 58.5 27 4478 21 48 30 21 49 30 --- 17 43 24 11.4 284.8 5.9 58.5 60 4509 21 48 31 21 49 30 J1143+1834 17 43 24 10.3 285.4 6.0 58.2 -3 4509 No stop 21 51 00 --- 17 44 54 10.0 285.6 6.0 58.1 87 4555 21 49 31 21 51 00 1146+189 17 44 54 11.1 285.0 5.9 58.4 -3 4555 No stop 21 52 30 --- 17 46 25 10.8 285.2 5.9 58.3 87 4601 21 51 01 21 52 30 J1143+1834 17 46 25 9.7 285.8 6.0 58.0 -3 4601 No stop 21 54 00 --- 17 47 55 9.4 286.0 6.1 57.9 87 4648 21 52 31 21 54 30 1146+189 17 48 25 10.3 285.5 6.0 58.2 27 4648 21 54 30 21 55 30 --- 17 49 25 10.1 285.6 6.0 58.1 60 4679 21 54 31 21 57 00 1146+189 17 50 55 9.8 285.8 6.0 58.0 88 4679 21 57 00 21 58 30 --- 17 52 26 9.5 286.0 6.0 57.9 90 4725 21 57 01 --- Thu 14 Mar 2024 Day 74 --- 05 56 50 J2253+1608 01 52 04 46.8 257.9 2.9 58.4 28628 4725 05 56 50 06 00 00 =2251+158 01 55 15 46.1 258.5 3.0 58.6 190 4823 05 56 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess124.K4096 --- 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: 11 Station: KVNTN Total bit rate: 4096 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 34000.00 Net SB= L U L U L U L U L U L U L U L U IF SB = L L L L L L L L L L L L L L L L Pol. = LCP LCP LCP LCP LCP LCP LCP LCP RCP RCP RCP RCP RCP RCP RCP RCP BBC = 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 BBC SB= U L U L U L U L U L U L U L U L IF = A A A A A A A A B B B B B B B B The following frequency sets based on these setups were used. Frequency Set: 12 Setup file default. Used with PCAL = off LO sum= 22056.00 22056.00 22184.00 22184.00 22312.00 22312.00 22440.00 22440.00 22056.00 22056.00 22184.00 22184.00 22312.00 22312.00 22440.00 22440.00 BBC fr= 11944.00 11944.00 11816.00 11816.00 11688.00 11688.00 11560.00 11560.00 11944.00 11944.00 11816.00 11816.00 11688.00 11688.00 11560.00 11560.00 Bandwd= 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 64.00 Matching frequency sets: 12 13 14 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) * J1143+1834 11 40 50.548716 * 11 43 26.069653 11 44 42.473842 0.00 18 51 17.31565 * 18 34 38.36006 18 26 28.94164 0.00 From catalog imbedded in main SCHED input file. * 1146+189 11 46 02.761062 * 11 48 37.776789 11 49 53.939413 0.00 18 56 49.43689 * 18 40 08.96963 18 31 58.56994 0.00 From catalog imbedded in main SCHED input file. 2251+158 22 51 29.519750 * 22 53 57.747949 22 55 07.753465 0.10 * J2253+1608 15 52 54.34812 * 16 08 53.56095 16 16 25.89881 0.10 From catalog imbedded in main SCHED input file. rfc_2023d Petrov and Kovalev, in preparation 47794 observations 1156+295 11 56 57.786211 * 11 59 31.833912 12 00 47.719496 0.00 * J1159+2914 29 31 25.73880 * 29 14 43.82690 29 06 32.33096 0.00 J1159+29 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 78215 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 J1143+1834 sess124.K4096 1 2 3 4 5 6 7 9 10 11 12 4.750 191.576 1146+189 sess124.K4096 1 2 3 4 5 6 7 9 10 11 12 4.075 185.349 J2253+1608 sess124.K4096 1 2 3 4 5 6 7 9 10 11 12 0.053 4.803 J1159+2914 sess124.K4096 1 2 3 4 5 6 7 9 10 11 12 0.367 18.833 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) J1143+1834 163.9 1146+189 163.6 J2253+1608 21.4 J1159+2914 152.7 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