COVER INFORMATION Station: HART (Code Hh ) Experiment: Zooming into the cores of restarting giant radio galaxies Exp. Code: EB074C Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Gabriele Bruni Address: INAF-IAPS via del Fosso del Cavaliere, 100 00133 - Rome Italy Phone: +39 06 4548 8456 EMAIL: gabriele.bruni@inaf.it Fax: --- Phone during observation: +39 06 4548 8456 Observing mode: Phase-referencing of sources at 3.6cm Notes: Schedule for HART (Code Hh ) Page 2 Zooming into the cores of restarting giant radio galaxies 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 19 Oct 2020 Day 293 --- ---------- ########### Fringe Finder ########### ---------- Next scan frequencies: 8319.49 8319.49 8319.49 8319.49 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 8511.49 8511.49 8511.49 8511.49 Next BBC frequencies: 239.49 239.49 239.49 239.49 303.49 303.49 303.49 303.49 367.49 367.49 367.49 367.49 431.49 431.49 431.49 431.49 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 21 00 00 J0237+2848 00 45 55 28.9 28.3 -1.9 0.0 0 0 21 00 00 21 03 00 =0234+285 00 48 55 29.2 27.6 -1.8 0.0 180 46 21 00 01 21 06 00 0309+411B 00 51 56 15.1 26.9 -2.4 0.0 128 46 21 06 00 21 10 00 --- 00 55 57 15.5 26.2 -2.3 0.0 240 108 21 06 01 21 10 00 0309+411B 00 55 57 15.5 26.2 -2.3 0.0 -20 108 No stop 21 14 00 --- 00 59 57 15.8 25.6 -2.2 0.0 220 170 21 10 01 21 14 30 0309+411B 01 00 27 15.9 25.5 -2.2 0.0 9 170 21 14 30 21 18 30 --- 01 04 28 16.3 24.8 -2.2 0.0 240 232 21 14 31 21 20 30 4C40.08 01 06 28 22.0 11.2 -0.9 0.0 56 232 21 20 30 21 24 30 --- 01 10 29 22.1 10.4 -0.9 0.0 240 294 21 20 31 21 25 30 J0204+4005 01 11 29 22.7 11.1 -0.9 0.0 33 294 21 25 30 21 27 00 =0201+398 01 12 59 22.8 10.8 -0.9 0.0 90 317 21 25 31 21 28 00 4C40.08 01 13 59 22.3 9.7 -0.8 0.0 33 317 21 28 00 21 32 00 --- 01 18 00 22.4 8.9 -0.7 0.0 240 379 21 28 01 21 33 00 J0204+4005 01 19 00 23.1 9.6 -0.8 0.0 33 379 21 33 00 21 34 30 =0201+398 01 20 31 23.1 9.3 -0.7 0.0 90 402 21 33 01 21 35 30 4C40.08 01 21 31 22.5 8.2 -0.7 0.0 33 402 21 35 30 21 39 30 --- 01 25 31 22.7 7.4 -0.6 0.0 240 464 21 35 31 21 40 30 J0204+4005 01 26 32 23.3 8.1 -0.6 0.0 33 464 21 40 30 21 42 00 =0201+398 01 28 02 23.4 7.8 -0.6 0.0 90 487 21 40 31 21 43 00 4C40.08 01 29 02 22.8 6.7 -0.5 0.0 33 487 21 43 00 21 47 00 --- 01 33 03 22.9 5.9 -0.5 0.0 240 549 21 43 01 21 48 00 J0204+4005 01 34 03 23.5 6.5 -0.5 0.0 33 549 21 48 00 21 49 30 =0201+398 01 35 33 23.6 6.2 -0.5 0.0 90 572 21 48 01 Schedule for HART (Code Hh ) Page 3 Zooming into the cores of restarting giant radio galaxies 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 19 Oct 2020 Day 293 --- 21 51 30 LQ033+03 01 37 33 30.5 9.2 -0.6 0.0 78 572 21 51 30 21 55 30 --- 01 41 34 30.6 8.3 -0.6 0.0 240 634 21 51 31 21 56 30 J0205+3212 01 42 34 31.5 5.9 -0.4 0.0 29 634 21 56 30 21 58 00 =0202+319 01 44 04 31.6 5.5 -0.4 0.0 90 657 21 56 31 21 59 00 LQ033+03 01 45 05 30.7 7.4 -0.5 0.0 29 657 21 59 00 22 03 00 --- 01 49 05 30.8 6.5 -0.4 0.0 240 719 21 59 01 22 04 00 J0205+3212 01 50 05 31.7 4.0 -0.3 0.0 29 719 22 04 00 22 05 30 =0202+319 01 51 36 31.7 3.7 -0.2 0.0 90 742 22 04 01 22 06 30 LQ033+03 01 52 36 30.9 5.6 -0.4 0.0 29 742 22 06 30 22 10 30 --- 01 56 36 31.0 4.6 -0.3 0.0 240 804 22 06 31 22 11 30 J0205+3212 01 57 37 31.8 2.2 -0.1 0.0 29 804 22 11 30 22 13 00 =0202+319 01 59 07 31.8 1.8 -0.1 0.0 90 827 22 11 31 22 14 00 LQ033+03 02 00 07 31.0 3.8 -0.3 0.0 29 827 22 14 00 22 18 00 --- 02 04 08 31.1 2.8 -0.2 0.0 240 889 22 14 01 22 19 00 J0205+3212 02 05 08 31.8 0.3 -0.0 0.0 29 889 22 19 00 22 20 30 =0202+319 02 06 38 31.8 359.9 0.0 0.0 90 912 22 19 01 22 23 30 0309+411B 02 09 39 21.0 12.9 -1.1 0.0 119 912 22 23 30 22 27 30 --- 02 13 39 21.2 12.2 -1.0 0.0 240 974 22 23 31 22 27 30 0309+411B 02 13 39 21.2 12.2 -1.0 0.0 -20 974 No stop 22 31 30 --- 02 17 40 21.4 11.4 -0.9 0.0 220 1036 22 27 31 22 32 00 0309+411B 02 18 10 21.5 11.3 -0.9 0.0 9 1036 22 32 00 22 36 00 --- 02 22 11 21.6 10.5 -0.9 0.0 240 1098 22 32 01 22 38 00 4C40.08 02 24 11 23.0 355.4 0.4 0.0 56 1098 22 38 00 22 42 00 --- 02 28 12 22.9 354.6 0.4 0.0 240 1159 22 38 01 22 43 00 J0204+4005 02 29 12 23.7 355.0 0.4 0.0 33 1159 22 43 00 22 44 30 =0201+398 02 30 42 23.7 354.7 0.4 0.0 90 1183 22 43 01 22 45 30 4C40.08 02 31 42 22.8 353.9 0.5 0.0 33 1183 22 45 30 22 49 30 --- 02 35 43 22.7 353.0 0.6 0.0 240 1244 22 45 31 22 50 30 J0204+4005 02 36 43 23.5 353.5 0.5 0.0 33 1244 22 50 30 22 52 00 =0201+398 02 38 13 23.5 353.2 0.5 0.0 90 1268 22 50 31 Schedule for HART (Code Hh ) Page 4 Zooming into the cores of restarting giant radio galaxies 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 19 Oct 2020 Day 293 --- 22 53 00 4C40.08 02 39 13 22.6 352.3 0.6 0.0 33 1268 22 53 00 22 57 00 --- 02 43 14 22.5 351.5 0.7 0.0 240 1329 22 53 01 22 58 00 J0204+4005 02 44 14 23.3 351.9 0.6 0.0 33 1329 22 58 00 22 59 30 =0201+398 02 45 45 23.3 351.6 0.7 0.0 90 1353 22 58 01 23 00 30 4C40.08 02 46 45 22.4 350.8 0.8 0.0 33 1353 23 00 30 23 04 30 --- 02 50 45 22.2 350.0 0.8 0.0 240 1414 23 00 31 23 05 30 J0204+4005 02 51 46 23.0 350.4 0.8 0.0 33 1414 23 05 30 23 07 00 =0201+398 02 53 16 23.0 350.1 0.8 0.0 90 1438 23 05 31 23 09 00 LQ033+03 02 55 16 30.4 350.3 0.7 0.0 78 1438 23 09 00 23 13 00 --- 02 59 17 30.2 349.4 0.7 0.0 240 1499 23 09 01 23 14 00 J0205+3212 03 00 17 30.4 346.8 0.9 0.0 29 1499 23 14 00 23 15 30 =0202+319 03 01 47 30.3 346.4 0.9 0.0 90 1523 23 14 01 23 16 30 LQ033+03 03 02 47 30.1 348.5 0.8 0.0 29 1523 23 16 30 23 20 30 --- 03 06 48 29.9 347.6 0.9 0.0 240 1584 23 16 31 23 21 30 J0205+3212 03 07 48 30.0 345.0 1.0 0.0 29 1584 23 21 30 23 23 00 =0202+319 03 09 18 29.9 344.7 1.1 0.0 90 1608 23 21 31 23 24 00 LQ033+03 03 10 19 29.7 346.8 0.9 0.0 29 1608 23 24 00 23 28 00 --- 03 14 19 29.5 345.8 1.0 0.0 240 1669 23 24 01 23 29 00 J0205+3212 03 15 19 29.5 343.3 1.2 0.0 29 1669 23 29 00 23 30 30 =0202+319 03 16 50 29.4 342.9 1.2 0.0 90 1693 23 29 01 23 31 30 LQ033+03 03 17 50 29.3 345.0 1.0 0.0 29 1693 23 31 30 23 35 30 --- 03 21 50 29.1 344.1 1.1 0.0 240 1755 23 31 31 23 36 30 J0205+3212 03 22 51 29.0 341.5 1.3 0.0 29 1755 23 36 30 23 38 00 =0202+319 03 24 21 28.9 341.2 1.3 0.0 90 1778 23 36 31 23 41 00 0309+411B 03 27 21 22.6 357.4 0.2 0.0 119 1778 23 41 00 23 45 00 --- 03 31 22 22.6 356.6 0.3 0.0 240 1840 23 41 01 23 45 00 0309+411B 03 31 22 22.6 356.6 0.3 0.0 -20 1840 No stop 23 49 00 --- 03 35 23 22.5 355.7 0.3 0.0 220 1901 23 45 01 23 49 30 0309+411B 03 35 53 22.5 355.6 0.4 0.0 9 1901 23 49 30 23 53 30 --- 03 39 53 22.4 354.8 0.4 0.0 240 1963 23 49 31 Schedule for HART (Code Hh ) Page 5 Zooming into the cores of restarting giant radio galaxies 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 19 Oct 2020 Day 293 --- 23 55 30 4C40.08 03 41 54 19.3 340.2 1.7 0.0 56 1963 23 55 30 23 59 30 --- 03 45 54 18.9 339.5 1.7 0.0 240 2025 23 55 31 --- Tue 20 Oct 2020 Day 294 --- 00 00 30 J0204+4005 03 46 55 19.8 339.6 1.7 0.0 33 2025 00 00 30 00 02 00 =0201+398 03 48 25 19.7 339.3 1.7 0.0 90 2048 00 00 31 00 03 00 4C40.08 03 49 25 18.7 338.8 1.8 0.0 33 2048 00 03 00 00 07 00 --- 03 53 26 18.3 338.1 1.9 0.0 240 2110 00 03 01 00 08 00 J0204+4005 03 54 26 19.2 338.2 1.8 0.0 33 2110 00 08 00 00 09 30 =0201+398 03 55 56 19.1 338.0 1.8 0.0 90 2133 00 08 01 00 10 30 4C40.08 03 56 56 18.0 337.5 1.9 0.0 33 2133 00 10 30 00 14 30 --- 04 00 57 17.7 336.8 2.0 0.0 240 2195 00 10 31 00 15 30 J0204+4005 04 01 57 18.6 336.9 1.9 0.0 33 2195 00 15 30 00 17 00 =0201+398 04 03 27 18.4 336.6 2.0 0.0 90 2218 00 15 31 00 18 00 4C40.08 04 04 27 17.4 336.2 2.0 0.0 33 2218 00 18 00 00 22 00 --- 04 08 28 17.0 335.5 2.1 0.0 240 2280 00 18 01 00 23 00 J0204+4005 04 09 28 17.9 335.6 2.1 0.0 33 2280 00 23 00 00 24 30 =0201+398 04 10 58 17.8 335.3 2.1 0.0 90 2303 00 23 01 00 26 30 LQ033+03 04 12 59 24.9 333.0 2.0 0.0 78 2303 00 26 30 00 30 30 --- 04 16 59 24.4 332.2 2.0 0.0 240 2365 00 26 31 00 31 30 J0205+3212 04 18 00 23.9 329.8 2.2 0.0 29 2365 00 31 30 00 33 00 =0202+319 04 19 30 23.7 329.5 2.2 0.0 90 2388 00 31 31 00 34 00 LQ033+03 04 20 30 24.1 331.5 2.1 0.0 29 2388 00 34 00 00 38 00 --- 04 24 31 23.6 330.7 2.2 0.0 240 2450 00 34 01 00 39 00 J0205+3212 04 25 31 23.0 328.4 2.3 0.0 29 2450 00 39 00 00 40 30 =0202+319 04 27 01 22.8 328.1 2.3 0.0 90 2473 00 39 01 00 41 30 LQ033+03 04 28 01 23.2 330.1 2.2 0.0 29 2473 00 41 30 00 45 30 --- 04 32 02 22.8 329.3 2.3 0.0 240 2535 00 41 31 00 48 30 0309+411B 04 35 02 20.2 344.0 1.3 0.0 124 2535 00 48 30 00 52 30 --- 04 39 03 19.9 343.3 1.4 0.0 240 2597 00 48 31 Schedule for HART (Code Hh ) Page 6 Zooming into the cores of restarting giant radio galaxies 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 ---------------------------------------------------------------------------------------- --- Tue 20 Oct 2020 Day 294 --- 00 52 30 0309+411B 04 39 03 19.9 343.3 1.4 0.0 -20 2597 No stop 00 56 30 --- 04 43 04 19.6 342.5 1.5 0.0 220 2659 00 52 31 00 57 00 0309+411B 04 43 34 19.6 342.4 1.5 0.0 9 2659 00 57 00 01 02 00 --- 04 48 35 19.3 341.5 1.6 0.0 300 2736 00 57 01 ---------- ########### Fringe Finder ########### ---------- 02 35 35 4C39.25 06 22 25 12.0 35.2 -3.1 0.0 5402 2736 02 35 35 02 38 25 --- 06 25 25 12.4 34.8 -3.0 0.0 170 2780 02 35 36 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess320.X2048 Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: hhsx Values confirmed by E-mail Jonathan Quick 20140219 (CR) ****** Only 256.00 of 512.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 6 Station: HART 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= 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 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 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 BBC SB= L L U U L L U U L L U U L L U U IF = A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 9 Setup file default. Used with PCAL = off LO sum= 8319.49 8319.49 8319.49 8319.49 8383.49 8383.49 8383.49 8383.49 8447.49 8447.49 8447.49 8447.49 8511.49 8511.49 8511.49 8511.49 BBC fr= 239.49 239.49 239.49 239.49 303.49 303.49 303.49 303.49 367.49 367.49 367.49 367.49 431.49 431.49 431.49 431.49 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: 9 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) * 0309+411B 03 09 44.731641 * 03 13 01.900000 03 14 24.287010 0.00 41 08 48.61606 * 41 20 01.00000 41 24 35.25083 0.00 From catalog imbedded in main SCHED input file. * 4C40.08 01 57 22.236897 * 02 00 24.480600 02 01 40.842052 0.00 40 34 34.21982 * 40 49 04.32100 40 55 04.20035 0.00 From catalog imbedded in main SCHED input file. * LQ033+03 02 11 18.131170 * 02 14 15.400000 02 15 29.510237 0.00 32 37 06.54880 * 32 51 05.00000 32 56 51.85522 0.00 From catalog imbedded in main SCHED input file. * 0658+49 06 58 18.253245 * 07 02 06.268000 07 03 39.813639 0.00 49 03 40.49882 * 48 59 20.30000 48 57 21.44752 0.00 From catalog imbedded in main SCHED input file. * 0654+73 06 48 15.042628 * 06 54 26.700000 06 56 59.251857 0.00 73 23 32.64153 * 73 19 50.00000 73 17 57.21160 0.00 From catalog imbedded in main SCHED input file. * 4C75 08 13 39.650505 * 08 19 50.500000 08 22 19.944155 0.00 75 48 02.54756 * 75 38 39.56000 75 34 27.52396 0.00 From catalog imbedded in main SCHED input file. 0201+398 02 01 02.903347 * 02 04 05.194780 02 05 21.552692 0.19 * J0204+4005 39 50 41.49514 * 40 05 03.51511 40 10 59.91964 0.15 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 72 observations. 0202+319 02 02 09.652800 * 02 05 04.925362 02 06 18.206760 0.00 * J0205+3212 31 58 10.39522 * 32 12 30.09544 32 18 26.19904 0.00 J0205+32 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 49141 observations. 0234+285 02 34 55.589590 * 02 37 52.405677 02 39 06.232137 0.00 * J0237+2848 28 35 11.40773 * 28 48 08.98999 28 53 30.17156 0.00 J0237+28 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 58420 observations. 0650+507 06 50 28.757134 * 06 54 22.093158 06 55 57.902350 0.15 * J0654+5042 50 46 11.08313 * 50 42 23.87323 50 40 37.97149 0.11 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 162 observations. 0708+742 07 08 18.040386 * 07 14 36.124974 07 17 10.690951 0.56 * J0714+7408 74 13 17.50282 * 74 08 10.14418 74 05 42.20800 0.15 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 80 observations. * 4C39.25 09 23 55.319216 * 09 27 03.013937 09 28 18.922735 0.31 J0927+3902 39 15 23.56644 * 39 02 20.85185 38 56 53.81110 0.16 0923+392 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0927+39 GSFC 2016a X/S astro solution, 250526 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 0309+411B sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.817 57.615 4C40.08 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.800 52.382 LQ033+03 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.733 47.933 0658+49 sess320.X2048 1 2 3 4 5 6 7 8 10 0.800 45.427 0654+73 sess320.X2048 1 2 3 4 5 6 7 8 10 0.800 51.365 4C75 sess320.X2048 1 2 3 4 5 6 7 8 10 0.708 46.113 J0204+4005 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.300 19.550 J0205+3212 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.250 17.425 J0237+2848 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.050 3.900 J0654+5042 sess320.X2048 1 2 3 4 5 6 7 8 10 0.300 17.050 J0714+7408 sess320.X2048 1 2 3 4 5 6 7 8 10 0.275 17.875 4C39.25 sess320.X2048 1 2 3 4 5 6 7 8 9 10 0.047 3.683 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) 0309+411B 142.8 4C40.08 149.2 LQ033+03 156.1 0658+49 103.9 0654+73 103.1 4C75 97.5 J0204+4005 149.8 J0205+3212 157.3 J0237+2848 157.0 J0654+5042 105.1 J0714+7408 101.6 4C39.25 76.6 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