COVER INFORMATION Station: VLBA_MK (Code Mk ) 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 VLBA_MK (Code Mk ) 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- Next scan frequencies: 1594.00 1594.00 1626.00 1626.00 1658.00 1658.00 1690.00 1690.00 Next BBC frequencies: 806.00 806.00 774.00 774.00 742.00 742.00 710.00 710.00 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 09 05 34 OQ208 10 06 43 34.8 68.6 -4.0 -84.6 0 0 09 05 34 09 06 34 --- 10 07 44 35.0 68.7 -4.0 -84.7 60 8 09 05 35 09 06 34 OQ208 10 07 44 35.0 68.7 -4.0 -84.7 -6 8 09 06 40 09 10 34 --- 10 11 44 35.9 68.8 -3.9 -85.1 234 38 09 06 35 09 12 06 J1532+2344 10 13 17 16.5 70.2 -5.3 -75.2 43 38 09 12 06 09 13 06 =1530+239 10 14 17 16.7 70.3 -5.3 -75.2 60 46 09 12 07 09 13 06 J1532+2344 10 14 17 16.7 70.3 -5.3 -75.2 -6 46 09 13 12 09 13 36 =1530+239 10 14 47 16.8 70.3 -5.3 -75.3 24 49 09 13 07 09 14 03 ARP220 10 15 14 16.4 70.5 -5.3 -75.1 18 49 09 14 03 09 24 33 --- 10 25 46 18.7 71.1 -5.2 -75.9 630 130 09 14 04 09 25 00 J1532+2344 10 26 13 19.4 71.0 -5.1 -76.2 19 130 09 25 00 09 26 00 =1530+239 10 27 13 19.6 71.1 -5.1 -76.3 60 138 09 25 01 09 26 00 J1532+2344 10 27 13 19.6 71.1 -5.1 -76.3 -6 138 09 26 06 09 26 30 =1530+239 10 27 44 19.7 71.1 -5.1 -76.3 24 141 09 26 01 09 26 57 ARP220 10 28 10 19.2 71.2 -5.1 -76.1 18 141 09 26 57 09 37 27 --- 10 38 42 21.6 71.8 -5.0 -77.0 630 222 09 26 58 09 37 55 J1532+2344 10 39 10 22.2 71.7 -4.9 -77.3 18 222 09 37 55 09 38 55 =1530+239 10 40 10 22.5 71.8 -4.9 -77.3 60 230 09 37 56 09 38 55 J1532+2344 10 40 10 22.5 71.8 -4.9 -77.3 -6 230 09 39 01 09 39 25 =1530+239 10 40 40 22.6 71.8 -4.9 -77.4 24 233 09 38 56 09 39 52 ARP220 10 41 07 22.1 72.0 -4.9 -77.2 18 233 09 39 52 09 50 22 --- 10 51 39 24.5 72.5 -4.7 -78.0 630 314 09 39 53 09 50 49 J1532+2344 10 52 06 25.1 72.4 -4.7 -78.3 18 314 09 50 49 09 51 49 =1530+239 10 53 06 25.4 72.5 -4.7 -78.4 60 322 09 50 50 09 51 49 J1532+2344 10 53 06 25.4 72.5 -4.7 -78.4 -6 322 09 51 55 09 52 19 =1530+239 10 53 36 25.5 72.5 -4.7 -78.4 24 325 09 51 50 09 52 46 ARP220 10 54 03 25.0 72.7 -4.7 -78.2 18 325 09 52 46 10 03 16 --- 11 04 35 27.4 73.2 -4.5 -79.0 630 406 09 52 47 Schedule for VLBA_MK (Code Mk ) 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 ---------------------------------------------------------------------------------------- --- Mon 13 Mar 2023 Day 72 --- 10 03 43 J1532+2344 11 05 02 28.0 73.1 -4.5 -79.3 18 406 10 03 43 10 05 13 =1530+239 11 06 32 28.4 73.1 -4.5 -79.4 90 417 10 03 44 10 07 31 OQ208 11 08 50 48.4 69.2 -3.0 -91.6 88 417 10 07 31 10 08 31 --- 11 09 51 48.7 69.2 -3.0 -91.7 60 425 10 07 32 10 08 31 OQ208 11 09 51 48.7 69.2 -3.0 -91.7 -6 425 10 08 37 10 12 31 --- 11 13 51 49.6 69.2 -2.9 -92.3 234 455 10 08 32 10 14 55 J1532+2344 11 16 16 30.6 73.6 -4.3 -80.2 96 455 10 14 55 10 15 55 =1530+239 11 17 16 30.8 73.6 -4.3 -80.2 60 463 10 14 56 10 15 55 J1532+2344 11 17 16 30.8 73.6 -4.3 -80.2 -6 463 10 16 01 10 16 25 =1530+239 11 17 47 30.9 73.7 -4.3 -80.3 24 466 10 15 56 10 16 40 ARP220 11 18 02 30.4 73.8 -4.3 -80.0 6 466 10 16 40 10 27 10 --- 11 28 33 32.8 74.3 -4.1 -80.8 630 547 10 16 41 10 27 19 J1532+2344 11 28 42 33.4 74.1 -4.1 -81.1 0 547 10 27 19 10 28 19 =1530+239 11 29 43 33.6 74.2 -4.1 -81.2 60 555 10 27 11 10 28 19 J1532+2344 11 29 43 33.6 74.2 -4.1 -81.2 -6 555 10 28 25 10 28 49 =1530+239 11 30 13 33.7 74.2 -4.1 -81.2 24 558 10 28 20 10 28 58 ARP220 11 30 22 33.2 74.4 -4.1 -80.9 0 558 10 28 58 10 39 28 --- 11 40 53 35.6 74.8 -3.9 -81.7 630 639 10 28 50 10 39 37 J1532+2344 11 41 02 36.2 74.6 -3.9 -82.1 0 639 10 39 37 10 40 37 =1530+239 11 42 03 36.4 74.7 -3.9 -82.2 60 647 10 39 29 10 40 37 J1532+2344 11 42 03 36.4 74.7 -3.9 -82.2 -6 647 10 40 43 10 41 07 =1530+239 11 42 33 36.5 74.7 -3.9 -82.2 24 650 10 40 38 10 41 16 ARP220 11 42 42 36.0 74.9 -3.9 -81.9 0 650 10 41 16 10 51 46 --- 11 53 13 38.4 75.3 -3.7 -82.7 630 731 10 41 08 10 51 56 J1532+2344 11 53 23 39.0 75.1 -3.7 -83.0 1 731 10 51 55 10 52 56 =1530+239 11 54 23 39.2 75.1 -3.7 -83.1 60 739 10 51 47 10 52 56 J1532+2344 11 54 23 39.2 75.1 -3.7 -83.1 -6 739 10 53 02 10 53 26 =1530+239 11 54 53 39.3 75.2 -3.6 -83.1 24 742 10 52 57 10 53 36 ARP220 11 55 03 38.8 75.4 -3.7 -82.8 1 742 10 53 35 11 04 06 --- 12 05 35 41.2 75.7 -3.5 -83.6 630 823 10 53 27 Schedule for VLBA_MK (Code Mk ) 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 --- 11 04 17 J1532+2344 12 05 46 41.8 75.5 -3.5 -84.0 2 823 11 04 17 11 05 47 =1530+239 12 07 16 42.1 75.6 -3.4 -84.1 90 835 11 04 18 11 08 13 OQ208 12 09 43 61.8 66.7 -2.0 -101.0 98 835 11 08 13 11 09 13 --- 12 10 43 62.0 66.6 -2.0 -101.2 60 843 11 08 14 11 09 13 OQ208 12 10 43 62.0 66.6 -2.0 -101.2 -6 843 11 09 19 11 13 13 --- 12 14 43 62.8 66.2 -1.9 -102.0 234 873 11 09 14 11 15 24 J1532+2344 12 16 55 44.3 75.9 -3.3 -84.9 83 873 11 15 24 11 16 24 =1530+239 12 17 55 44.6 75.9 -3.3 -85.0 60 881 11 15 25 11 16 24 J1532+2344 12 17 55 44.6 75.9 -3.3 -85.0 -6 881 11 16 30 11 16 54 =1530+239 12 18 25 44.7 75.9 -3.3 -85.0 24 884 11 16 25 11 17 05 ARP220 12 18 36 44.2 76.2 -3.3 -84.6 2 884 11 17 05 11 27 35 --- 12 29 08 46.6 76.5 -3.1 -85.5 630 965 11 17 06 11 27 46 J1532+2344 12 29 19 47.2 76.2 -3.1 -85.9 2 965 11 27 46 11 28 46 =1530+239 12 30 19 47.4 76.2 -3.1 -86.0 60 973 11 27 47 11 28 46 J1532+2344 12 30 19 47.4 76.2 -3.1 -86.0 -6 973 11 28 52 11 29 16 =1530+239 12 30 49 47.5 76.2 -3.0 -86.0 24 976 11 28 47 11 29 26 ARP220 12 30 59 47.0 76.5 -3.1 -85.6 2 976 11 29 26 11 39 56 --- 12 41 31 49.4 76.8 -2.9 -86.5 630 1057 11 29 27 11 40 07 J1532+2344 12 41 42 50.0 76.5 -2.9 -86.9 2 1057 11 40 07 11 41 07 =1530+239 12 42 42 50.2 76.5 -2.9 -87.0 60 1065 11 40 08 11 41 07 J1532+2344 12 42 42 50.2 76.5 -2.9 -87.0 -6 1065 11 41 13 11 41 37 =1530+239 12 43 12 50.3 76.5 -2.8 -87.1 24 1068 11 41 08 11 41 47 ARP220 12 43 22 49.9 76.8 -2.9 -86.6 2 1068 11 41 47 11 52 17 --- 12 53 54 52.3 77.0 -2.7 -87.5 630 1149 11 41 48 11 52 27 J1532+2344 12 54 04 52.8 76.7 -2.7 -88.0 2 1149 11 52 27 11 53 27 =1530+239 12 55 05 53.1 76.7 -2.6 -88.1 60 1157 11 52 28 11 53 27 J1532+2344 12 55 05 53.1 76.7 -2.6 -88.1 -6 1157 11 53 33 11 53 57 =1530+239 12 55 35 53.2 76.7 -2.6 -88.2 24 1160 11 53 28 11 54 08 ARP220 12 55 45 52.7 77.0 -2.7 -87.7 1 1160 11 54 08 12 04 38 --- 13 06 17 55.1 77.2 -2.5 -88.6 630 1241 11 54 09 Schedule for VLBA_MK (Code Mk ) 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 --- 12 04 48 J1532+2344 13 06 27 55.7 76.8 -2.5 -89.2 1 1241 12 04 48 12 06 18 =1530+239 13 07 57 56.0 76.8 -2.4 -89.3 90 1252 12 04 49 12 07 26 OQ208 13 09 05 74.1 54.7 -1.0 -119.2 22 1252 12 07 26 12 08 26 --- 13 10 05 74.3 54.4 -1.0 -119.7 60 1260 12 07 27 12 08 26 OQ208 13 10 05 74.3 54.4 -1.0 -119.7 -6 1260 12 08 32 12 12 26 --- 13 14 06 75.0 52.6 -0.9 -121.8 234 1290 12 08 27 12 13 28 J1532+2344 13 15 08 57.6 76.8 -2.3 -90.0 17 1290 12 13 28 12 14 28 =1530+239 13 16 08 57.9 76.8 -2.3 -90.1 60 1298 12 13 29 12 14 28 J1532+2344 13 16 08 57.9 76.8 -2.3 -90.1 -6 1298 12 14 34 12 14 58 =1530+239 13 16 38 58.0 76.8 -2.3 -90.2 24 1301 12 14 29 12 15 07 ARP220 13 16 48 57.5 77.2 -2.3 -89.6 1 1301 12 15 06 12 25 37 --- 13 27 20 59.9 77.2 -2.1 -90.7 630 1382 12 14 59 12 25 47 J1532+2344 13 27 29 60.5 76.7 -2.1 -91.3 1 1382 12 25 46 12 26 47 =1530+239 13 28 30 60.7 76.7 -2.1 -91.4 60 1390 12 25 38 12 26 47 J1532+2344 13 28 30 60.7 76.7 -2.1 -91.4 -6 1390 12 26 53 12 27 17 =1530+239 13 29 00 60.8 76.7 -2.1 -91.5 24 1393 12 26 48 12 27 26 ARP220 13 29 09 60.4 77.2 -2.1 -90.9 1 1393 12 27 26 12 37 56 --- 13 39 41 62.8 77.1 -1.9 -92.0 630 1475 12 27 18 12 38 06 J1532+2344 13 39 50 63.3 76.5 -1.9 -92.7 1 1475 12 38 05 12 39 06 =1530+239 13 40 50 63.5 76.5 -1.9 -92.9 60 1482 12 37 57 12 39 06 J1532+2344 13 40 50 63.5 76.5 -1.9 -92.9 -6 1482 12 39 12 12 39 36 =1530+239 13 41 20 63.6 76.5 -1.9 -92.9 24 1486 12 39 07 12 39 45 ARP220 13 41 30 63.2 77.0 -1.9 -92.2 0 1486 12 39 44 12 50 15 --- 13 52 01 65.6 76.8 -1.7 -93.5 630 1567 12 39 37 12 50 24 J1532+2344 13 52 11 66.1 76.1 -1.7 -94.3 0 1567 12 50 24 12 51 24 =1530+239 13 53 11 66.4 76.1 -1.7 -94.5 60 1574 12 50 16 12 51 24 J1532+2344 13 53 11 66.4 76.1 -1.7 -94.5 -6 1574 12 51 30 12 51 54 =1530+239 13 53 41 66.5 76.0 -1.7 -94.6 24 1578 12 51 25 12 52 03 ARP220 13 53 50 66.0 76.7 -1.7 -93.8 0 1578 12 52 03 13 02 33 --- 14 04 22 68.4 76.2 -1.5 -95.3 630 1659 12 51 55 Schedule for VLBA_MK (Code Mk ) 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 --- 13 02 42 J1532+2344 14 04 31 68.9 75.4 -1.5 -96.2 0 1659 13 02 42 13 04 12 =1530+239 14 06 01 69.3 75.3 -1.5 -96.5 90 1670 13 02 34 13 05 11 OQ208 14 07 00 81.5 1.6 -0.0 -178.3 0 1670 13 05 11 13 06 11 --- 14 08 00 81.5 0.1 -0.0 -179.9 60 1678 13 05 12 13 06 11 OQ208 14 08 00 81.5 0.1 -0.0 -179.9 -6 1678 13 06 17 13 10 11 --- 14 12 01 81.4 -5.8 0.1 173.8 234 1708 13 06 12 13 11 15 J1532+2344 14 13 05 70.9 74.7 -1.3 -97.7 0 1708 13 11 15 13 12 15 =1530+239 14 14 05 71.1 74.6 -1.3 -97.9 60 1716 13 11 16 13 12 15 J1532+2344 14 14 05 71.1 74.6 -1.3 -97.9 -6 1716 13 12 21 13 12 45 =1530+239 14 14 35 71.2 74.6 -1.3 -98.0 24 1719 13 12 16 13 12 53 ARP220 14 14 44 70.8 75.5 -1.4 -97.0 0 1719 13 12 53 13 23 23 --- 14 25 15 73.2 74.4 -1.2 -99.0 630 1800 13 12 46 13 23 32 J1532+2344 14 25 24 73.7 73.3 -1.1 -100.3 0 1800 13 23 32 13 24 32 =1530+239 14 26 24 73.9 73.1 -1.1 -100.6 60 1808 13 23 24 13 24 32 J1532+2344 14 26 24 73.9 73.1 -1.1 -100.6 -6 1808 13 24 38 13 25 02 =1530+239 14 26 54 74.0 73.1 -1.1 -100.7 24 1811 13 24 33 13 25 11 ARP220 14 27 03 73.6 74.2 -1.1 -99.4 0 1811 13 25 11 13 35 41 --- 14 37 35 76.0 72.4 -1.0 -102.2 630 1892 13 25 03 13 35 50 J1532+2344 14 37 44 76.4 71.0 -0.9 -103.8 0 1892 13 35 50 13 36 50 =1530+239 14 38 44 76.7 70.8 -0.9 -104.1 60 1900 13 35 42 13 36 50 J1532+2344 14 38 44 76.7 70.8 -0.9 -104.1 -6 1900 13 36 56 13 37 20 =1530+239 14 39 14 76.8 70.6 -0.9 -104.3 24 1903 13 36 51 13 37 28 ARP220 14 39 23 76.4 72.1 -0.9 -102.7 0 1903 13 37 28 13 47 58 --- 14 49 54 78.7 69.2 -0.8 -106.5 630 1984 13 37 21 13 48 08 J1532+2344 14 50 04 79.1 67.3 -0.7 -108.7 0 1984 13 48 08 13 49 08 =1530+239 14 51 04 79.4 66.9 -0.7 -109.2 60 1992 13 47 59 13 49 08 J1532+2344 14 51 04 79.4 66.9 -0.7 -109.2 -6 1992 13 49 14 13 49 38 =1530+239 14 51 34 79.5 66.7 -0.7 -109.4 24 1995 13 49 09 13 49 47 ARP220 14 51 43 79.1 68.6 -0.7 -107.3 0 1995 13 49 47 14 00 17 --- 15 02 15 81.4 63.7 -0.6 -113.2 630 2076 13 49 39 Schedule for VLBA_MK (Code Mk ) 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 --- 14 00 27 J1532+2344 15 02 25 81.8 60.7 -0.5 -116.4 0 2076 14 00 27 14 01 57 =1530+239 15 03 55 82.1 59.6 -0.5 -117.6 90 2088 14 00 28 14 03 23 OQ208 15 05 22 74.4 -54.1 1.0 120.0 0 2088 14 03 23 14 04 23 --- 15 06 22 74.2 -54.5 1.0 119.5 60 2095 14 03 24 14 04 23 OQ208 15 06 22 74.2 -54.5 1.0 119.5 -6 2095 14 04 29 14 08 23 --- 15 10 23 73.4 -56.0 1.0 117.6 234 2126 14 04 24 14 09 46 J1532+2344 15 11 46 83.6 52.0 -0.4 -125.9 0 2126 14 09 46 14 10 46 =1530+239 15 12 46 83.8 50.8 -0.4 -127.3 60 2133 14 09 47 14 10 46 J1532+2344 15 12 46 83.8 50.8 -0.4 -127.3 -6 2133 14 10 52 14 11 16 =1530+239 15 13 16 83.9 50.1 -0.3 -128.0 24 2136 14 10 47 14 11 27 ARP220 15 13 27 83.6 54.3 -0.4 -123.6 0 2136 14 11 27 14 21 57 --- 15 23 58 85.4 37.0 -0.2 -141.8 630 2217 14 11 28 14 22 10 J1532+2344 15 24 11 85.6 29.6 -0.2 -149.5 0 2217 14 22 10 14 23 10 =1530+239 15 25 12 85.7 27.0 -0.1 -152.2 60 2225 14 22 11 14 23 10 J1532+2344 15 25 12 85.7 27.0 -0.1 -152.2 -6 2225 14 23 16 14 23 40 =1530+239 15 25 42 85.7 25.6 -0.1 -153.6 24 2228 14 23 11 14 23 52 ARP220 15 25 54 85.7 32.4 -0.2 -146.7 0 2228 14 23 52 14 34 22 --- 15 36 26 86.4 -1.7 0.0 178.3 630 2309 14 23 53 14 34 36 J1532+2344 15 36 39 86.1 -9.7 0.0 170.0 0 2309 14 34 36 14 35 36 =1530+239 15 37 40 86.0 -13.0 0.1 166.7 60 2317 14 34 37 14 35 36 J1532+2344 15 37 40 86.0 -13.0 0.1 166.7 -6 2317 14 35 42 14 36 06 =1530+239 15 38 10 86.0 -14.6 0.1 165.0 24 2320 14 35 37 14 36 18 ARP220 15 38 22 86.3 -8.6 0.0 171.1 0 2320 14 36 18 14 46 48 --- 15 48 54 85.3 -39.1 0.2 139.7 630 2401 14 36 19 14 46 58 J1532+2344 15 49 03 84.8 -42.0 0.3 136.6 0 2401 14 46 58 14 47 58 =1530+239 15 50 04 84.6 -43.7 0.3 134.8 60 2409 14 46 49 14 47 58 J1532+2344 15 50 04 84.6 -43.7 0.3 134.8 -6 2409 14 48 04 14 48 28 =1530+239 15 50 34 84.5 -44.6 0.3 133.9 24 2412 14 47 59 14 48 37 ARP220 15 50 43 85.0 -42.8 0.2 135.9 0 2412 14 48 37 14 59 07 --- 16 01 15 83.1 -57.2 0.4 120.4 630 2493 14 48 29 Schedule for VLBA_MK (Code Mk ) 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 --- 14 59 16 J1532+2344 16 01 24 82.5 -57.8 0.5 119.7 0 2493 14 59 16 15 00 46 =1530+239 16 02 54 82.2 -59.0 0.5 118.3 90 2505 14 59 08 15 01 39 OQ208 16 03 47 62.3 -66.4 1.9 101.5 3 2505 15 01 39 15 02 39 --- 16 04 47 62.1 -66.5 1.9 101.3 60 2513 15 01 40 15 02 39 OQ208 16 04 47 62.1 -66.5 1.9 101.3 -6 2513 15 02 45 15 06 39 --- 16 08 48 61.2 -66.9 2.0 100.5 234 2543 15 02 40 15 07 30 J1532+2344 16 09 39 80.8 -63.6 0.6 113.1 2 2543 15 07 30 15 08 30 =1530+239 16 10 40 80.6 -64.1 0.6 112.5 60 2551 15 07 31 15 08 30 J1532+2344 16 10 40 80.6 -64.1 0.6 112.5 -6 2551 15 08 36 15 09 00 =1530+239 16 11 10 80.5 -64.4 0.6 112.1 24 2554 15 08 31 15 09 09 ARP220 16 11 19 81.0 -64.6 0.6 112.1 0 2554 15 09 09 15 19 39 --- 16 21 50 78.7 -69.2 0.8 106.6 630 2635 15 09 01 15 19 48 J1532+2344 16 21 59 78.2 -68.8 0.8 106.7 0 2635 15 19 48 15 20 48 =1530+239 16 23 00 77.9 -69.2 0.8 106.3 60 2643 15 19 40 15 20 48 J1532+2344 16 23 00 77.9 -69.2 0.8 106.3 -6 2643 15 20 54 15 21 18 =1530+239 16 23 30 77.8 -69.3 0.8 106.1 24 2646 15 20 49 15 21 27 ARP220 16 23 39 78.3 -69.8 0.8 105.8 0 2646 15 21 27 15 31 57 --- 16 34 10 76.0 -72.4 1.0 102.2 630 2727 15 21 19 15 32 06 J1532+2344 16 34 19 75.4 -72.0 1.0 102.4 0 2727 15 32 06 15 33 06 =1530+239 16 35 19 75.2 -72.1 1.0 102.1 60 2735 15 31 58 15 33 06 J1532+2344 16 35 19 75.2 -72.1 1.0 102.1 -6 2735 15 33 12 15 33 36 =1530+239 16 35 50 75.1 -72.2 1.0 102.0 24 2738 15 33 07 15 33 45 ARP220 16 35 58 75.6 -72.8 1.0 101.7 0 2738 15 33 45 15 44 15 --- 16 46 30 73.2 -74.4 1.2 99.1 630 2819 15 33 37 15 44 24 J1532+2344 16 46 39 72.7 -73.9 1.2 99.3 0 2819 15 44 24 15 45 24 =1530+239 16 47 39 72.4 -74.0 1.2 99.1 60 2827 15 44 16 15 45 24 J1532+2344 16 47 39 72.4 -74.0 1.2 99.1 -6 2827 15 45 30 15 45 54 =1530+239 16 48 09 72.3 -74.1 1.2 99.0 24 2830 15 45 25 15 46 03 ARP220 16 48 18 72.8 -74.6 1.2 98.7 0 2830 15 46 03 15 56 33 --- 16 58 50 70.4 -75.6 1.4 96.7 630 2911 15 45 55 Schedule for VLBA_MK (Code Mk ) 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 --- 15 56 42 J1532+2344 16 58 59 69.9 -75.1 1.4 96.9 0 2911 15 56 42 15 58 12 =1530+239 17 00 29 69.5 -75.2 1.4 96.6 90 2922 15 56 34 15 59 02 OQ208 17 01 20 49.8 -69.2 2.9 92.4 1 2922 15 59 02 16 00 02 --- 17 02 20 49.5 -69.2 2.9 92.2 60 2930 15 59 03 16 00 02 OQ208 17 02 20 49.5 -69.2 2.9 92.2 -6 2930 16 00 08 16 04 02 --- 17 06 21 48.7 -69.2 3.0 91.7 234 2960 16 00 03 16 04 52 J1532+2344 17 07 10 68.0 -75.7 1.6 95.6 0 2960 16 04 52 16 05 52 =1530+239 17 08 10 67.8 -75.8 1.6 95.4 60 2968 16 04 53 16 05 52 J1532+2344 17 08 10 67.8 -75.8 1.6 95.4 -6 2968 16 05 58 16 06 22 =1530+239 17 08 40 67.7 -75.8 1.6 95.3 24 2971 16 05 53 16 06 31 ARP220 17 08 49 68.1 -76.3 1.5 95.1 0 2971 16 06 31 16 17 01 --- 17 19 21 65.7 -76.7 1.7 93.6 630 3052 16 06 23 16 17 09 J1532+2344 17 19 30 65.2 -76.3 1.8 93.8 0 3052 16 17 09 16 18 09 =1530+239 17 20 30 65.0 -76.3 1.8 93.7 60 3060 16 17 02 16 18 09 J1532+2344 17 20 30 65.0 -76.3 1.8 93.7 -6 3060 16 18 15 16 18 39 =1530+239 17 21 00 64.8 -76.3 1.8 93.6 24 3063 16 18 10 16 18 48 ARP220 17 21 09 65.3 -76.8 1.8 93.4 0 3063 16 18 48 16 29 18 --- 17 31 41 62.9 -77.1 1.9 92.1 630 3144 16 18 40 16 29 27 J1532+2344 17 31 50 62.4 -76.6 2.0 92.2 0 3144 16 29 27 16 29 57 =1530+239 17 32 20 62.3 -76.6 2.0 92.2 30 3148 16 29 19 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess123.L1024glob Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: v20cm_2 FD filtered above 1760. SC filtered above 1740. Setup group: 10 Station: VLBA_MK 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= 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 2400.00 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 VLBA FE= 20cm omit 20cm omit VLBA Synth= 14.6 2.4 14.6 The following frequency sets based on these setups were used. See the crd files for VLBA legacy system setups and pcal detection details. Frequency Set: 18 Setup file default. Used with PCAL = off LO sum= 1594.00 1594.00 1626.00 1626.00 1658.00 1658.00 1690.00 1690.00 BBC fr= 806.00 806.00 774.00 774.00 742.00 742.00 710.00 710.00 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= 766.00 766.00 734.00 734.00 CRD bw= 16.00 16.00 16.00 16.00 Matching frequency sets: 18 19 20 21 22 23 24 25 26 27 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) * 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