COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: Confirming the first detection of a merging dual SMBH system at high-z Exp. Code: gs044a Schedule Version: 2.00 Processed by SCHED version: 11.50 Development version 11.5. Started Apr. 2 PI: Cristiana Spingola Address: University of Bologna - INAF-IRA via Gobetti 101 40129 Bologna Italy Phone: +39 3938231373 EMAIL: spingola@ira.inaf.it Fax: Phone during observation: Observing mode: Notes: v2: T6 IF C->B, BBC 9-12 -> 5-8 Ar confirms BBC tunings for their RDBE COVER LETTER: Schedule for GBT_VLBA (Code Gb ) Page 2 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- Next scan frequencies: 4860.25 4860.25 4892.25 4892.25 4924.25 4924.25 4956.25 4956.25 Next BBC frequencies: 775.75 775.75 743.75 743.75 711.75 711.75 679.75 679.75 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 17 12 10 MG2016 14 11 58 5.5 79.7 -6.1 D -51.9 0 0 17 12 10 17 15 40 --- 14 15 29 6.2 80.2 -6.1 -52.0 0 27 17 12 11 17 17 20 MG2016 14 17 09 6.5 80.5 -6.1 -52.0 79 27 17 17 20 17 20 50 --- 14 20 39 7.2 81.0 -6.0 -52.1 210 54 17 17 21 17 22 20 MG2016 14 22 10 7.5 81.2 -6.0 -52.2 69 54 17 22 20 17 25 50 --- 14 25 40 8.2 81.8 -5.9 -52.3 210 81 17 22 21 17 26 30 J2018+0831 14 26 20 6.7 84.4 -5.9 -52.0 6 81 17 26 30 17 27 30 --- 14 27 21 6.9 84.5 -5.9 -52.1 60 89 17 26 31 17 27 30 MG2016 14 27 21 8.5 82.0 -5.9 -52.3 -34 89 17 28 04 17 31 00 --- 14 30 51 9.2 82.5 -5.8 -52.4 176 112 17 27 31 17 31 00 J2018+0831 14 30 51 7.6 85.0 -5.8 -52.1 -34 112 17 31 34 17 32 30 --- 14 32 21 7.9 85.3 -5.8 -52.1 56 119 17 31 01 17 32 30 MG2016 14 32 21 9.5 82.8 -5.8 -52.5 -34 119 17 33 04 17 36 00 --- 14 35 52 10.2 83.3 -5.7 -52.6 176 141 17 32 31 17 36 40 J2018+0831 14 36 32 8.7 85.9 -5.7 -52.2 6 141 17 36 40 17 37 40 --- 14 37 32 8.9 86.1 -5.7 -52.2 60 149 17 36 41 17 37 40 MG2016 14 37 32 10.5 83.5 -5.7 -52.6 -34 149 17 38 14 17 41 10 --- 14 41 03 11.2 84.1 -5.7 -52.7 176 172 17 37 41 17 41 10 J2018+0831 14 41 03 9.6 86.6 -5.6 -52.3 -34 172 17 41 44 17 42 40 --- 14 42 33 9.9 86.8 -5.6 -52.3 56 179 17 41 11 17 42 40 MG2016 14 42 33 11.5 84.3 -5.6 -52.7 -34 179 17 43 14 17 46 10 --- 14 46 04 12.1 84.8 -5.6 -52.8 176 202 17 42 41 17 46 50 J2018+0831 14 46 44 10.7 87.5 -5.5 -52.3 6 202 17 46 50 17 47 50 --- 14 47 44 10.9 87.6 -5.5 -52.3 60 209 17 46 51 17 47 50 MG2016 14 47 44 12.5 85.1 -5.5 -52.8 -34 209 17 48 24 17 51 20 --- 14 51 14 13.2 85.6 -5.5 -52.9 176 232 17 47 51 17 51 20 J2018+0831 14 51 14 11.6 88.2 -5.5 -52.4 -34 232 17 51 54 17 52 50 --- 14 52 45 11.9 88.4 -5.4 -52.4 56 239 17 51 21 Schedule for GBT_VLBA (Code Gb ) Page 3 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 17 52 50 MG2016 14 52 45 13.5 85.9 -5.5 -52.9 -34 239 17 53 24 17 56 20 --- 14 56 15 14.1 86.4 -5.4 -52.9 176 262 17 52 51 17 57 00 J2018+0831 14 56 55 12.7 89.0 -5.4 -52.4 6 262 17 57 00 17 58 00 --- 14 57 56 12.9 89.2 -5.4 -52.4 60 270 17 57 01 17 58 00 MG2016 14 57 56 14.5 86.6 -5.4 -52.9 -34 270 17 58 34 18 01 30 --- 15 01 26 15.2 87.2 -5.3 -53.0 176 292 17 58 01 18 01 30 J2018+0831 15 01 26 13.6 89.7 -5.3 -52.4 -34 292 18 02 04 18 03 00 --- 15 02 56 13.9 90.0 -5.3 -52.4 56 300 18 01 31 18 03 00 MG2016 15 02 56 15.4 87.4 -5.3 -53.0 -34 300 18 03 34 18 06 30 --- 15 06 27 16.1 87.9 -5.2 -53.0 176 322 18 03 01 18 07 10 J2018+0831 15 07 07 14.7 90.6 -5.2 -52.4 6 322 18 07 10 18 08 10 --- 15 08 07 14.9 90.8 -5.2 -52.4 60 330 18 07 11 18 08 10 MG2016 15 08 07 16.5 88.2 -5.2 -53.0 -34 330 18 08 44 18 11 40 --- 15 11 38 17.1 88.7 -5.1 -53.1 176 353 18 08 11 18 11 40 J2018+0831 15 11 38 15.6 91.3 -5.1 -52.4 -35 353 18 12 15 18 13 10 --- 15 13 08 15.9 91.6 -5.1 -52.4 55 360 18 11 41 18 13 10 MG2016 15 13 08 17.4 89.0 -5.1 -53.1 -34 360 18 13 44 18 16 40 --- 15 16 39 18.1 89.5 -5.1 -53.1 176 382 18 13 11 18 17 20 J2018+0831 15 17 19 16.7 92.2 -5.0 -52.3 5 382 18 17 20 18 18 20 --- 15 18 19 16.9 92.4 -5.0 -52.3 60 390 18 17 21 18 18 20 MG2016 15 18 19 18.5 89.8 -5.0 -53.1 -34 390 18 18 54 18 21 50 --- 15 21 49 19.1 90.3 -5.0 -53.1 176 413 18 18 21 18 21 50 J2018+0831 15 21 49 17.6 92.9 -5.0 -52.3 -35 413 18 22 25 18 23 20 --- 15 23 20 17.9 93.2 -4.9 -52.3 55 420 18 21 51 18 23 20 MG2016 15 23 20 19.4 90.6 -4.9 -53.1 -34 420 18 23 54 18 26 50 --- 15 26 50 20.1 91.1 -4.9 -53.1 176 443 18 23 21 18 27 30 J2018+0831 15 27 30 18.7 93.8 -4.9 -52.2 5 443 18 27 30 18 28 30 --- 15 28 31 18.9 94.0 -4.8 -52.2 60 450 18 27 31 18 28 30 MG2016 15 28 31 20.5 91.4 -4.9 -53.1 -34 450 18 29 04 18 32 00 --- 15 32 01 21.1 91.9 -4.8 -53.0 176 473 18 28 31 Schedule for GBT_VLBA (Code Gb ) Page 4 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 18 32 00 J2018+0831 15 32 01 19.6 94.6 -4.8 -52.2 -35 473 18 32 35 18 33 30 --- 15 33 31 19.9 94.8 -4.8 -52.1 55 480 18 32 01 18 33 30 MG2016 15 33 31 21.4 92.2 -4.8 -53.0 -34 480 18 34 04 18 37 00 --- 15 37 02 22.1 92.7 -4.7 -53.0 176 503 18 33 31 18 37 40 J2018+0831 15 37 42 20.7 95.5 -4.7 -52.1 5 503 18 37 40 18 38 40 --- 15 38 42 20.9 95.7 -4.7 -52.0 60 511 18 37 41 18 38 40 MG2016 15 38 42 22.4 93.0 -4.7 -53.0 -35 511 18 39 15 18 42 10 --- 15 42 13 23.1 93.5 -4.6 -52.9 175 533 18 38 41 18 42 10 J2018+0831 15 42 13 21.6 96.2 -4.6 -52.0 -35 533 18 42 45 18 43 40 --- 15 43 43 21.9 96.5 -4.6 -51.9 55 540 18 42 11 18 43 40 MG2016 15 43 43 23.4 93.8 -4.6 -52.9 -35 540 18 44 15 18 47 10 --- 15 47 14 24.1 94.4 -4.5 -52.9 175 563 18 43 41 18 47 50 J2018+0831 15 47 54 22.7 97.2 -4.5 -51.8 5 563 18 47 50 18 48 50 --- 15 48 54 22.9 97.3 -4.5 -51.8 60 570 18 47 51 18 48 50 MG2016 15 48 54 24.4 94.6 -4.5 -52.8 -35 570 18 49 25 18 52 20 --- 15 52 24 25.1 95.2 -4.5 -52.8 175 593 18 48 51 18 52 20 J2018+0831 15 52 24 23.5 97.9 -4.4 -51.7 -35 593 18 52 55 18 53 50 --- 15 53 55 23.8 98.2 -4.4 -51.6 55 600 18 52 21 18 53 50 MG2016 15 53 55 25.4 95.4 -4.4 -52.7 -35 600 18 54 25 18 57 20 --- 15 57 25 26.1 96.0 -4.4 -52.7 175 623 18 53 51 18 58 00 J2018+0831 15 58 05 24.6 98.9 -4.4 -51.5 5 623 18 58 00 18 59 00 --- 15 59 06 24.8 99.0 -4.3 -51.5 60 630 18 58 01 18 59 00 MG2016 15 59 06 26.4 96.3 -4.4 -52.6 -35 630 18 59 35 19 02 30 --- 16 02 36 27.1 96.9 -4.3 -52.5 175 653 18 59 01 19 02 30 J2018+0831 16 02 36 25.5 99.6 -4.3 -51.4 -35 653 19 03 05 19 04 00 --- 16 04 06 25.8 99.9 -4.3 -51.3 55 660 19 02 31 19 04 00 MG2016 16 04 06 27.4 97.1 -4.3 -52.5 -35 660 19 04 35 19 07 30 --- 16 07 37 28.1 97.7 -4.2 -52.4 175 682 19 04 01 19 08 10 J2018+0831 16 08 17 26.6 100.6 -4.2 -51.1 5 682 19 08 10 19 09 10 --- 16 09 17 26.8 100.8 -4.2 -51.1 60 690 19 08 11 Schedule for GBT_VLBA (Code Gb ) Page 5 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 19 09 10 MG2016 16 09 17 28.4 98.0 -4.2 -52.3 -35 690 19 09 45 19 12 40 --- 16 12 48 29.1 98.6 -4.1 -52.2 175 713 19 09 11 19 12 40 J2018+0831 16 12 48 27.5 101.4 -4.1 -51.0 -35 713 19 13 15 19 14 10 --- 16 14 18 27.8 101.7 -4.1 -50.9 55 720 19 12 41 19 14 10 MG2016 16 14 18 29.4 98.9 -4.1 -52.2 -35 720 19 14 45 19 17 40 --- 16 17 49 30.1 99.5 -4.0 -52.0 175 742 19 14 11 19 18 20 J2018+0831 16 18 29 28.6 102.4 -4.0 -50.7 5 742 19 18 20 19 19 20 --- 16 19 29 28.8 102.6 -4.0 -50.6 60 750 19 18 21 19 19 20 MG2016 16 19 29 30.4 99.8 -4.0 -52.0 -35 750 19 19 55 19 22 50 --- 16 22 59 31.1 100.4 -4.0 -51.8 175 773 19 19 21 19 22 50 J2018+0831 16 22 59 29.4 103.2 -3.9 -50.5 -35 773 19 23 25 19 24 20 --- 16 24 30 29.7 103.5 -3.9 -50.4 55 780 19 22 51 19 24 20 MG2016 16 24 30 31.3 100.7 -3.9 -51.8 -35 780 19 24 55 19 27 50 --- 16 28 00 32.0 101.3 -3.9 -51.6 175 802 19 24 21 19 28 30 J2018+0831 16 28 40 30.5 104.3 -3.8 -50.2 5 802 19 28 30 19 29 30 --- 16 29 41 30.7 104.4 -3.8 -50.1 60 810 19 28 31 19 30 10 J2018+0831 16 30 21 30.8 104.6 -3.8 -50.1 19 810 Stopped 19 36 10 --- 16 36 22 32.0 105.7 -3.7 -49.7 360 810 19 36 10 MG2016 16 36 22 33.6 102.8 -3.7 -51.2 -35 810 19 36 45 19 39 40 --- 16 39 52 34.3 103.4 -3.7 -51.0 175 833 19 36 11 19 39 40 J2018+0831 16 39 52 32.6 106.3 -3.7 -49.5 -35 833 19 40 15 19 41 10 --- 16 41 23 32.9 106.6 -3.6 -49.4 55 840 19 39 41 19 41 10 MG2016 16 41 23 34.6 103.7 -3.6 -50.9 -35 840 19 41 45 19 44 40 --- 16 44 53 35.2 104.4 -3.6 -50.7 175 862 19 41 11 19 45 20 J2018+0831 16 45 33 33.7 107.4 -3.6 -49.1 5 862 19 45 20 19 46 20 --- 16 46 33 33.9 107.6 -3.5 -49.0 60 870 19 45 21 19 46 20 MG2016 16 46 33 35.6 104.7 -3.6 -50.6 -35 870 19 46 55 19 49 50 --- 16 50 04 36.2 105.4 -3.5 -50.4 175 892 19 46 21 19 49 50 J2018+0831 16 50 04 34.5 108.3 -3.5 -48.8 -35 892 19 50 25 19 51 20 --- 16 51 34 34.8 108.6 -3.5 -48.7 55 900 19 49 51 Schedule for GBT_VLBA (Code Gb ) Page 6 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 19 51 20 MG2016 16 51 34 36.5 105.7 -3.5 -50.3 -35 900 19 51 55 19 54 50 --- 16 55 05 37.2 106.4 -3.4 -50.1 175 922 19 51 21 19 55 30 J2018+0831 16 55 45 35.6 109.5 -3.4 -48.3 4 922 19 55 30 19 56 30 --- 16 56 45 35.8 109.7 -3.4 -48.2 60 930 19 55 31 19 56 30 MG2016 16 56 45 37.5 106.7 -3.4 -50.0 -35 930 19 57 05 20 00 00 --- 17 00 16 38.1 107.4 -3.3 -49.7 175 952 19 56 31 20 00 00 J2018+0831 17 00 16 36.4 110.4 -3.3 -48.0 -36 952 20 00 36 20 01 30 --- 17 01 46 36.7 110.7 -3.3 -47.8 54 959 20 00 01 20 01 30 MG2016 17 01 46 38.4 107.7 -3.3 -49.6 -35 959 20 02 05 20 05 00 --- 17 05 16 39.1 108.4 -3.2 -49.3 175 982 20 01 31 20 05 40 J2018+0831 17 05 57 37.5 111.6 -3.2 -47.5 4 982 20 05 40 20 06 40 --- 17 06 57 37.6 111.8 -3.2 -47.4 60 990 20 05 41 20 06 40 MG2016 17 06 57 39.4 108.8 -3.2 -49.2 -35 990 20 07 15 20 10 10 --- 17 10 27 40.0 109.5 -3.2 -48.9 175 1012 20 06 41 20 10 10 J2018+0831 17 10 27 38.3 112.5 -3.1 -47.0 -36 1012 20 10 46 20 11 40 --- 17 11 58 38.5 112.9 -3.1 -46.9 54 1019 20 10 11 20 11 40 MG2016 17 11 58 40.3 109.8 -3.1 -48.8 -35 1019 20 12 15 20 15 10 --- 17 15 28 41.0 110.6 -3.1 -48.5 175 1042 20 11 41 20 15 50 J2018+0831 17 16 08 39.3 113.8 -3.0 -46.5 4 1042 20 15 50 20 16 50 --- 17 17 08 39.5 114.0 -3.0 -46.4 60 1049 20 15 51 20 16 50 MG2016 17 17 08 41.3 110.9 -3.1 -48.3 -36 1049 20 17 26 20 20 20 --- 17 20 39 41.9 111.7 -3.0 -48.0 174 1072 20 16 51 20 20 20 J2018+0831 17 20 39 40.1 114.8 -3.0 -46.0 -36 1072 20 20 56 20 21 50 --- 17 22 09 40.4 115.1 -2.9 -45.8 54 1079 20 20 21 20 21 50 MG2016 17 22 09 42.2 112.0 -3.0 -47.8 -36 1079 20 22 26 20 25 20 --- 17 25 40 42.8 112.8 -2.9 -47.5 174 1101 20 21 51 20 26 00 J2018+0831 17 26 20 41.1 116.1 -2.9 -45.4 4 1101 20 26 00 20 27 00 --- 17 27 20 41.3 116.3 -2.9 -45.3 60 1109 20 26 01 20 27 00 MG2016 17 27 20 43.1 113.2 -2.9 -47.3 -36 1109 20 27 36 20 30 30 --- 17 30 51 43.7 114.0 -2.8 -46.9 174 1131 20 27 01 Schedule for GBT_VLBA (Code Gb ) Page 7 Confirming the first detection of a merging dual SMBH system at high-z 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 ---------------------------------------------------------------------------------------- --- Sat 26 Oct 2019 Day 299 --- 20 30 30 J2018+0831 17 30 51 41.9 117.1 -2.8 -44.8 -36 1131 20 31 06 20 32 00 --- 17 32 21 42.2 117.5 -2.8 -44.7 54 1138 20 30 31 20 32 00 MG2016 17 32 21 44.0 114.3 -2.8 -46.8 -36 1138 20 32 36 20 35 30 --- 17 35 51 44.6 115.2 -2.7 -46.3 174 1161 20 32 01 20 36 10 J2018+0831 17 36 32 42.9 118.5 -2.7 -44.1 4 1161 20 36 10 20 37 10 --- 17 37 32 43.1 118.7 -2.7 -44.0 60 1168 20 36 11 20 37 10 MG2016 17 37 32 44.9 115.6 -2.7 -46.2 -36 1168 20 37 46 20 40 40 --- 17 41 02 45.5 116.4 -2.7 -45.7 174 1191 20 37 11 20 41 20 J2018+0831 17 41 42 43.8 119.7 -2.6 -43.5 4 1191 20 41 20 20 42 20 --- 17 42 43 43.9 120.0 -2.6 -43.3 60 1199 20 41 21 20 42 20 MG2016 17 42 43 45.8 116.8 -2.6 -45.5 -36 1199 20 42 56 20 45 50 --- 17 46 13 46.5 117.7 -2.6 -45.1 174 1221 20 42 21 20 45 50 J2018+0831 17 46 13 44.5 120.9 -2.5 -42.8 -36 1221 20 46 26 20 47 20 --- 17 47 43 44.8 121.3 -2.5 -42.6 54 1228 20 45 51 20 47 20 MG2016 17 47 43 46.7 118.1 -2.5 -44.9 -36 1228 20 47 56 20 50 50 --- 17 51 14 47.3 119.0 -2.5 -44.4 174 1250 20 47 21 20 51 30 J2018+0831 17 51 54 45.5 122.3 -2.5 -42.0 4 1250 20 51 30 20 52 30 --- 17 52 54 45.6 122.6 -2.4 -41.9 60 1258 20 51 31 20 52 30 MG2016 17 52 54 47.6 119.4 -2.5 -44.1 -36 1258 20 53 06 20 56 00 --- 17 56 25 48.2 120.3 -2.4 -43.6 174 1280 20 52 31 20 56 30 J2018+0831 17 56 55 46.3 123.7 -2.4 -41.3 -6 1280 20 56 36 21 00 00 --- 18 00 25 46.9 124.6 -2.3 -40.7 204 1307 20 56 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess319.C1024glob Matching groups in /home/guest/rmc/SCHED/sched11.5/catalogs/freq_RDBE.dat: gbt6cmc LO1=7.868, LO2=12.732, LO3=10.5 Setup group: 1 Station: GBT_VLBA Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 5636.00 5636.00 5636.00 5636.00 5636.00 5636.00 5636.00 5636.00 Net SB= U U U U U U U U IF SB = L L L L L L L L Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = A C A C A C A C The following frequency sets based on these setups were used. Frequency Set: 17 Setup file default. Used with PCAL = off LO sum= 4860.25 4860.25 4892.25 4892.25 4924.25 4924.25 4956.25 4956.25 BBC fr= 775.75 775.75 743.75 743.75 711.75 711.75 679.75 679.75 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 VLBA legacy crd files using 4 channels based on RDBE channels: 3 4 5 6 CRD fr= 735.75 735.75 703.75 703.75 CRD bw= 16.00 16.00 16.00 16.00 Matching frequency sets: 17 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * MG2016 20 16 55.378166 * 20 19 18.092000 20 20 13.565900 0.00 11 17 44.97966 * 11 27 13.00000 11 31 08.04992 0.00 From catalog imbedded in main SCHED input file. * 3C345 16 41 17.606162 * 16 42 58.809900 16 43 36.764649 0.00 39 54 10.81394 * 39 48 36.99300 39 46 42.73413 0.00 From catalog imbedded in main SCHED input file. * J2018+0831 20 15 45.733430 * 20 18 11.311946 20 19 07.886706 0.00 08 22 30.62230 * 08 31 54.54739 08 35 47.14317 0.00 From catalog imbedded in main SCHED input file. 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 MG2016 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 6.650 489.300 3C345 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 0.225 6.793 J2018+0831 sess319.C1024glob 1 2 3 4 5 6 7 8 9 10 11 15 + 2.525 164.241 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) MG2016 96.6 3C345 64.2 J2018+0831 95.8 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