COVER INFORMATION Station: IRBENE (Code Ir ) Experiment: Observations of the core of the giant radio galaxy J145049+100649 Exp. Code: EH032A Schedule Version: 4.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: G.H. Heald Address: ASTRON Oude Hoogeveensedijk 4 Dwingeloo The Netherlands Phone: +31 521 595 774 EMAIL: heald@astron.nl Fax: +31 521 595 101 Phone during observation: +31 521 595 774 Observing mode: Phase-referencing of a source at 18cm (512 Mb/s) Notes: Place additional information here (note2-4 available) Schedule for IRBENE (Code Ir ) Page 2 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- Next scan frequencies: 1650.49 1650.49 1650.49 1650.49 Next BBC frequencies: 750.49 750.49 750.49 750.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 08 00 00 4C39.25 11 09 28 65.2-127.5 1.7 33.2 0 0 08 00 00 08 05 00 --- 11 14 28 64.6-125.6 1.8 34.1 300 5 08 00 01 08 12 53 J1450+0910 11 22 23 27.3-241.4 -3.5 -28.5 412 5 08 12 53 08 14 43 =1448+093 11 24 24 27.5-240.9 -3.4 -28.3 110 7 08 12 54 08 14 43 UGC09555 11 24 14 28.3-241.5 -3.5 -28.6 -3 7 No stop 08 23 43 --- 11 33 15 29.3-239.3 -3.3 -27.9 537 15 08 14 44 08 24 18 J1450+0910 11 33 50 28.6-238.6 -3.3 -27.6 32 15 08 24 18 08 26 18 =1448+093 11 35 50 28.8-238.1 -3.3 -27.5 120 17 08 24 19 08 26 18 UGC09555 11 35 50 29.6-238.7 -3.3 -27.7 -3 17 No stop 08 35 18 --- 11 44 52 30.6-236.4 -3.1 -27.0 537 26 08 26 19 08 38 19 OQ208 11 47 53 52.0-235.0 -2.3 -30.0 167 26 08 38 19 08 43 09 --- 11 52 53 52.5-233.4 -2.2 -29.3 290 30 08 38 20 08 46 08 J1450+0910 11 55 43 31.0-233.0 -2.9 -25.7 166 30 08 46 08 08 47 58 =1448+093 11 57 44 31.2-232.5 -2.9 -25.5 110 32 08 46 09 08 47 58 UGC09555 11 57 34 32.0-233.1 -2.9 -25.8 -3 32 No stop 08 56 58 --- 12 06 35 33.0-230.7 -2.7 -24.9 537 41 08 47 59 08 57 33 J1450+0910 12 07 10 32.2-230.0 -2.7 -24.6 32 41 08 57 33 08 59 33 =1448+093 12 09 11 32.4-229.5 -2.7 -24.4 120 43 08 57 34 08 59 33 UGC09555 12 09 11 33.3-230.0 -2.7 -24.7 -3 43 No stop 09 08 33 --- 12 18 12 34.2-227.6 -2.6 -23.7 537 51 08 59 34 09 09 08 J1450+0910 12 18 47 33.4-226.9 -2.5 -23.4 32 51 09 09 08 09 11 08 =1448+093 12 20 48 33.6-226.3 -2.5 -23.2 120 53 09 09 09 09 11 08 UGC09555 12 20 48 34.4-226.9 -2.5 -23.4 -3 53 No stop 09 20 08 --- 12 29 49 35.3-224.4 -2.4 -22.4 537 62 09 11 09 09 20 43 J1450+0910 12 30 24 34.5-223.7 -2.3 -22.1 32 62 09 20 43 09 22 43 =1448+093 12 32 24 34.7-223.1 -2.3 -21.8 120 64 09 20 44 09 22 43 UGC09555 12 32 24 35.5-223.7 -2.3 -22.1 -3 64 No stop 09 31 43 --- 12 41 26 36.3-221.1 -2.2 -21.0 537 73 09 22 44 Schedule for IRBENE (Code Ir ) Page 3 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- 09 35 34 3C286 12 45 17 61.7-201.5 -0.8 -13.2 215 73 09 35 34 09 40 24 --- 12 50 18 61.9-199.3 -0.7 -11.9 290 77 09 35 35 09 44 13 J1450+0910 12 53 58 36.5-217.0 -2.0 -19.1 213 77 09 44 13 09 46 03 =1448+093 12 55 58 36.7-216.4 -1.9 -18.8 110 79 09 44 14 09 46 03 UGC09555 12 55 48 37.6-216.9 -1.9 -19.1 -3 79 No stop 09 55 03 --- 13 04 50 38.3-214.3 -1.8 -17.9 537 88 09 46 04 09 55 38 J1450+0910 13 05 25 37.4-213.7 -1.8 -17.5 32 88 09 55 38 09 57 38 =1448+093 13 07 25 37.6-213.1 -1.7 -17.2 120 90 09 55 39 09 57 38 UGC09555 13 07 25 38.5-213.5 -1.7 -17.5 -3 90 No stop 10 06 38 --- 13 16 26 39.1-210.8 -1.6 -16.2 537 98 09 57 39 10 07 15 J1450+0910 13 17 04 38.3-210.2 -1.6 -15.8 34 98 10 07 15 10 09 05 =1448+093 13 19 04 38.4-209.6 -1.5 -15.5 110 100 10 07 16 10 09 05 UGC09555 13 18 54 39.3-210.0 -1.5 -15.8 -3 100 No stop 10 18 05 --- 13 27 56 39.9-207.2 -1.4 -14.4 537 109 10 09 06 10 18 40 J1450+0910 13 28 31 39.0-206.7 -1.4 -14.1 32 109 10 18 40 10 20 40 =1448+093 13 30 31 39.1-206.0 -1.3 -13.8 120 111 10 18 41 10 20 40 UGC09555 13 30 31 40.0-206.4 -1.4 -14.0 -3 111 No stop 10 29 40 --- 13 39 33 40.5-203.6 -1.2 -12.6 537 119 10 20 41 10 32 42 OQ208 13 42 35 60.5-191.3 -0.4 -6.8 169 119 10 32 42 10 37 32 --- 13 47 36 60.6-189.0 -0.3 -5.5 290 124 10 32 43 10 40 35 J1450+0910 13 50 29 40.2-199.8 -1.0 -10.6 170 124 10 40 35 10 42 25 =1448+093 13 52 30 40.2-199.2 -1.0 -10.3 110 126 10 40 36 10 42 25 UGC09555 13 52 20 41.2-199.5 -1.0 -10.5 -3 126 No stop 10 51 25 --- 14 01 21 41.5-196.6 -0.8 -9.0 537 134 10 42 26 10 52 00 J1450+0910 14 01 56 40.6-196.1 -0.8 -8.7 32 134 10 52 00 10 54 00 =1448+093 14 03 56 40.7-195.5 -0.8 -8.3 120 136 10 52 01 10 54 00 UGC09555 14 03 56 41.6-195.8 -0.8 -8.5 -3 136 No stop 11 03 00 --- 14 12 58 41.9-192.8 -0.6 -6.9 537 145 10 54 01 11 03 35 J1450+0910 14 13 33 41.0-192.4 -0.6 -6.7 32 145 11 03 35 11 05 35 =1448+093 14 15 33 41.1-191.7 -0.6 -6.3 120 147 11 03 36 Schedule for IRBENE (Code Ir ) Page 4 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- 11 05 35 UGC09555 14 15 33 42.0-192.0 -0.6 -6.5 -3 147 No stop 11 14 35 --- 14 24 35 42.2-189.0 -0.4 -4.9 537 155 11 05 36 11 15 10 J1450+0910 14 25 10 41.3-188.6 -0.4 -4.7 32 155 11 15 10 11 17 10 =1448+093 14 27 10 41.3-187.9 -0.4 -4.3 120 157 11 15 11 11 17 10 UGC09555 14 27 10 42.3-188.1 -0.4 -4.4 -3 157 No stop 11 26 10 --- 14 36 12 42.4-185.1 -0.3 -2.8 537 166 11 17 11 11 29 42 3C286 14 39 44 60.4-149.3 1.1 18.5 191 166 11 29 42 11 34 32 --- 14 44 45 60.1-147.3 1.2 19.7 290 171 11 29 43 11 38 03 J1450+0910 14 48 07 41.6-181.0 -0.1 -0.6 191 171 11 38 03 11 39 53 =1448+093 14 50 07 41.6-180.4 -0.0 -0.2 110 172 11 38 04 11 39 53 UGC09555 14 49 57 42.5-180.5 -0.0 -0.3 -3 172 No stop 11 48 53 --- 14 58 58 42.5-177.5 0.1 1.3 537 181 11 39 54 11 49 28 J1450+0910 14 59 34 41.5-177.3 0.1 1.5 32 181 11 49 28 11 51 28 =1448+093 15 01 34 41.5-176.6 0.2 1.8 120 183 11 49 29 11 51 28 UGC09555 15 01 34 42.5-176.7 0.2 1.8 -3 183 No stop 12 00 28 --- 15 10 35 42.4-173.7 0.3 3.5 537 192 11 51 29 12 01 05 J1450+0910 15 11 13 41.4-173.4 0.3 3.6 34 192 12 01 05 12 02 55 =1448+093 15 13 13 41.4-172.8 0.4 3.9 110 193 12 01 06 12 02 55 UGC09555 15 13 03 42.3-172.8 0.4 3.9 -3 193 No stop 12 11 55 --- 15 22 04 42.1-169.8 0.5 5.5 537 202 12 02 56 12 12 30 J1450+0910 15 22 40 41.2-169.7 0.5 5.6 32 202 12 12 30 12 14 30 =1448+093 15 24 40 41.1-169.0 0.6 5.9 120 204 12 12 31 12 14 30 UGC09555 15 24 40 42.1-169.0 0.6 6.0 -3 204 No stop 12 23 30 --- 15 33 41 41.8-166.0 0.7 7.6 537 213 12 14 31 12 26 20 OQ208 15 36 31 56.9-142.4 1.5 21.8 155 213 12 26 20 12 31 10 --- 15 41 32 56.5-140.6 1.6 22.8 290 217 12 26 21 12 34 03 J1450+0910 15 44 15 40.5-162.7 0.9 9.3 158 217 12 34 03 12 35 53 =1448+093 15 46 16 40.4-162.1 0.9 9.6 110 219 12 34 04 12 35 53 UGC09555 15 46 06 41.4-162.0 0.9 9.7 -3 219 No stop 12 44 53 --- 15 55 07 41.0-159.1 1.1 11.2 537 228 12 35 54 Schedule for IRBENE (Code Ir ) Page 5 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- 12 45 28 J1450+0910 15 55 42 40.0-159.0 1.1 11.2 32 228 12 45 28 12 47 28 =1448+093 15 57 42 39.9-158.4 1.1 11.5 120 230 12 45 29 12 47 28 UGC09555 15 57 42 40.8-158.3 1.1 11.6 -3 230 No stop 12 56 28 --- 16 06 44 40.3-155.4 1.3 13.1 537 238 12 47 29 12 57 03 J1450+0910 16 07 19 39.4-155.4 1.3 13.1 32 238 12 57 03 12 59 03 =1448+093 16 09 19 39.3-154.8 1.3 13.4 120 240 12 57 04 12 59 03 UGC09555 16 09 19 40.2-154.6 1.3 13.5 -3 240 No stop 13 08 03 --- 16 18 21 39.7-151.8 1.4 14.9 537 249 12 59 04 13 08 38 J1450+0910 16 18 56 38.7-151.8 1.5 14.9 32 249 13 08 38 13 10 38 =1448+093 16 20 56 38.6-151.2 1.5 15.2 120 251 13 08 39 13 10 38 UGC09555 16 20 56 39.5-151.0 1.5 15.3 -3 251 No stop 13 19 38 --- 16 29 58 38.9-148.2 1.6 16.7 537 259 13 10 39 13 22 50 3C286 16 33 10 48.8-111.4 3.0 35.4 171 259 13 22 50 13 27 40 --- 16 38 11 48.2-110.0 3.1 35.8 290 264 13 22 51 13 30 45 J1450+0910 16 41 07 37.1-145.2 1.8 18.1 164 264 13 30 45 13 32 35 =1448+093 16 43 07 37.0-144.6 1.9 18.4 110 266 13 30 46 13 32 35 UGC09555 16 42 57 37.9-144.3 1.9 18.5 -3 266 No stop 13 41 35 --- 16 51 58 37.2-141.7 2.0 19.7 537 275 13 32 36 13 42 10 J1450+0910 16 52 34 36.2-141.8 2.0 19.6 32 275 13 42 10 13 44 10 =1448+093 16 54 34 36.1-141.3 2.1 19.9 120 276 13 42 11 13 44 10 UGC09555 16 54 34 37.0-140.9 2.0 20.1 -3 276 No stop 13 53 10 --- 17 03 35 36.2-138.4 2.2 21.2 537 285 13 44 11 13 57 44 3C345 17 08 11 71.8-164.7 0.4 10.6 254 285 13 57 44 14 02 34 --- 17 13 11 71.6-161.7 0.5 12.7 290 290 13 57 45 14 07 17 J1450+0910 17 17 45 34.0-134.7 2.4 22.7 261 290 14 07 17 14 09 07 =1448+093 17 19 45 33.8-134.2 2.5 22.9 110 292 14 07 18 14 09 07 UGC09555 17 19 35 34.7-133.9 2.5 23.1 -3 292 No stop 14 18 07 --- 17 28 37 33.8-131.4 2.6 24.1 537 300 14 09 08 14 18 42 J1450+0910 17 29 12 32.9-131.6 2.6 24.0 32 300 14 18 42 14 20 42 =1448+093 17 31 12 32.7-131.1 2.7 24.2 120 302 14 18 43 Schedule for IRBENE (Code Ir ) Page 6 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- 14 20 42 UGC09555 17 31 12 33.5-130.7 2.7 24.4 -3 302 No stop 14 29 42 --- 17 40 14 32.6-128.3 2.8 25.3 537 311 14 20 43 14 31 58 OQ208 17 42 30 42.9-104.6 3.6 36.2 121 311 14 31 58 14 36 48 --- 17 47 31 42.2-103.4 3.7 36.4 290 315 14 31 59 14 39 00 J1450+0910 17 49 33 30.7-126.3 3.0 26.0 117 315 14 39 00 14 40 50 =1448+093 17 51 33 30.5-125.8 3.0 26.2 110 317 14 39 01 14 40 50 UGC09555 17 51 23 31.4-125.4 3.0 26.4 -3 317 No stop 14 49 50 --- 18 00 25 30.4-123.1 3.1 27.2 537 326 14 40 51 14 50 25 J1450+0910 18 01 00 29.5-123.4 3.2 27.0 32 326 14 50 25 14 52 25 =1448+093 18 03 00 29.2-122.8 3.2 27.2 120 328 14 50 26 14 52 25 UGC09555 18 03 00 30.1-122.4 3.2 27.4 -3 328 No stop 15 01 25 --- 18 12 01 29.1-120.2 3.3 28.1 537 336 14 52 26 15 02 00 J1450+0910 18 12 37 28.2-120.5 3.4 27.9 32 336 15 02 00 15 04 00 =1448+093 18 14 37 27.9-120.0 3.4 28.1 120 338 15 02 01 15 04 00 UGC09555 18 14 37 28.8-119.5 3.4 28.3 -3 338 No stop 15 13 00 --- 18 23 38 27.7-117.3 3.5 29.0 537 347 15 04 01 15 13 35 J1450+0910 18 24 13 26.8-117.6 3.5 28.8 32 347 15 13 35 15 15 35 =1448+093 18 26 14 26.6-117.1 3.6 28.9 120 349 15 13 36 15 15 35 UGC09555 18 26 14 27.4-116.7 3.6 29.1 -3 349 No stop 15 24 35 --- 18 35 15 26.3-114.5 3.7 29.7 537 358 15 15 36 15 27 31 3C286 18 38 12 32.3 -83.0 5.1 38.1 158 358 15 27 31 15 32 21 --- 18 43 13 31.7 -82.0 5.2 38.0 290 362 15 27 32 15 35 12 J1450+0910 18 45 54 24.2-112.4 3.9 30.1 152 362 15 35 12 15 37 02 =1448+093 18 47 54 23.9-112.0 3.9 30.3 110 364 15 35 13 15 37 02 UGC09555 18 47 44 24.8-111.6 3.9 30.4 -3 364 No stop 15 46 02 --- 18 56 46 23.6-109.5 4.1 30.9 537 373 15 37 03 15 46 37 J1450+0910 18 57 21 22.7-109.8 4.1 30.7 32 373 15 46 37 15 48 37 =1448+093 18 59 21 22.5-109.3 4.1 30.8 120 375 15 46 38 15 48 37 UGC09555 18 59 21 23.3-108.9 4.1 31.0 -3 375 No stop 15 57 37 --- 19 08 23 22.2-106.8 4.3 31.4 537 383 15 48 38 Schedule for IRBENE (Code Ir ) Page 7 Observations of the core of the giant radio galaxy J145049+100649 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 17 Oct 2015 Day 290 --- 15 58 12 J1450+0910 19 08 58 21.2-107.1 4.3 31.3 32 383 15 58 12 16 00 12 =1448+093 19 10 58 21.0-106.7 4.3 31.4 120 385 15 58 13 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess315.L512 --- 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: 15 Station: IRBENE Total bit rate: 128 Format: MARK5B Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 900.00 900.00 900.00 900.00 Net SB= L L U U IF SB = U U U U Pol. = RCP LCP RCP LCP BBC = 1 5 1 5 BBC SB= L L U U IF = A1 B1 A1 B1 The following frequency sets based on these setups were used. Frequency Set: 13 Setup file default. Used with PCAL = off LO sum= 1650.49 1650.49 1650.49 1650.49 BBC fr= 750.49 750.49 750.49 750.49 Bandwd= 8.00 8.00 8.00 8.00 Matching frequency sets: 13 Track assignments are: track1= 6, 8, 2, 4 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * UGC09555 14 48 23.739225 * 14 50 49.397000 14 51 33.998406 0.00 10 19 09.23120 * 10 06 49.31000 10 03 11.91829 0.00 From catalog imbedded in main SCHED input file. * 4C39.25 09 23 55.319215 * 09 27 03.013936 09 28 00.920337 0.30 J0927+3902 39 15 23.56645 * 39 02 20.85186 38 58 01.68818 0.16 0923+392 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J0927+39 GSFC 2015a astro solution, unpublished 245753 observations. * 3C286 13 28 49.657758 * 13 31 08.288051 13 31 50.136426 0.18 J1331+3030 30 45 58.64059 * 30 30 32.95924 30 25 51.23204 0.17 1328+307 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J1331+30 GSFC 2015a astro solution, unpublished 225 observations. * OQ208 14 04 45.615156 * 14 07 00.394414 14 07 41.130297 0.24 J1407+2827 28 41 29.23518 * 28 27 14.69022 28 22 58.48911 0.34 1404+286 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J1407+28 GSFC 2015a astro solution, unpublished 67871 observations. 1448+093 14 48 04.740055 * 14 50 31.168932 14 51 16.025239 0.13 * J1450+0910 09 22 48.79490 * 09 10 27.95504 09 06 50.20130 0.27 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc GSFC 2015a astro solution, unpublished 138 observations. * 3C345 16 41 17.606228 * 16 42 58.809966 16 43 29.356876 0.76 J1642+3948 39 54 10.81496 * 39 48 36.99402 39 47 15.94486 0.52 1641+399 /home/guest/rmc/SCHED/sched11.4/catalogs/sources.gsfc J1642+39 GSFC 2015a astro solution, unpublished 53430 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 UGC09555 sess315.L512 1 2 3 4 5 6 7 8 11 12 13 14 + 4.800 365.796 4C39.25 sess315.L512 1 2 3 4 5 6 7 8 11 12 13 0.083 6.500 3C286 sess315.L512 1 2 3 4 5 6 7 8 11 12 13 14 + 0.322 23.683 OQ208 sess315.L512 1 2 3 4 5 6 7 8 11 12 13 14 + 0.322 27.631 J1450+0910 sess315.L512 1 2 3 4 5 6 7 8 11 12 13 14 + 1.067 83.114 3C345 sess315.L512 1 2 3 4 5 6 7 8 11 13 14 15 0.081 7.331 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) UGC09555 28.3 4C39.25 73.6 3C286 39.7 OQ208 38.8 J1450+0910 27.7 3C345 66.6 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