  COVER INFORMATION 

 Station:    VLBA_FD   (Code Fd ) 
 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 VLBA_FD   (Code Fd )                                   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:    760.25   760.25   792.25   792.25   824.25   824.25   856.25   856.25
 Next scan bandwidths:     32.00    32.00    32.00    32.00    32.00    32.00    32.00    32.00

18 38 40  MG2016       14 02 17   2.1  77.8 -6.3  D  -59.1     0        0   18 38 40
18 42 10  ---          14 05 48   2.8  78.3 -6.2  H  -59.3     0       27   18 38 41

18 43 40  MG2016       14 07 18   3.1  78.4 -6.2  H  -59.4    84       27   18 43 40
18 47 10  ---          14 10 48   3.8  78.9 -6.2  H  -59.5     0       54   18 43 41

18 47 50  J2018+0831   14 11 29   2.7  81.6 -6.1  H  -59.4    30       54   18 47 50
18 48 50  ---          14 12 29   3.0  81.8 -6.1  H  -59.5     0       62   18 47 51

18 48 50  MG2016       14 12 29   4.2  79.1 -6.1     -59.6   -11       62   18 49 01
18 52 20  ---          14 15 59   4.9  79.5 -6.1     -59.7   199       87   18 48 51

18 52 20  J2018+0831   14 15 59   3.7  82.2 -6.1  H  -59.6   -10       87   18 52 30
18 53 50  ---          14 17 30   4.0  82.4 -6.0  H  -59.6     0       98   18 52 21

18 53 50  MG2016       14 17 30   5.3  79.7 -6.0     -59.8   -11       98   18 54 01
18 57 20  ---          14 21 00   6.0  80.2 -6.0     -59.9   199      123   18 53 51

18 58 00  J2018+0831   14 21 40   4.9  82.9 -6.0     -59.7    30      123   18 58 00
18 59 00  ---          14 22 40   5.1  83.0 -5.9     -59.7    60      131   18 58 01

18 59 00  MG2016       14 22 40   6.4  80.4 -6.0     -60.0   -10      131   18 59 10
19 02 30  ---          14 26 11   7.1  80.8 -5.9     -60.1   200      157   18 59 01

19 02 30  J2018+0831   14 26 11   5.9  83.5 -5.9     -59.8   -10      157   19 02 40
19 04 00  ---          14 27 41   6.2  83.7 -5.9     -59.9    80      167   19 02 31

19 04 00  MG2016       14 27 41   7.4  81.0 -5.9     -60.1   -10      167   19 04 10
19 07 30  ---          14 31 12   8.2  81.4 -5.8     -60.3   200      193   19 04 01

19 08 10  J2018+0831   14 31 52   7.1  84.2 -5.8     -60.0    30      193   19 08 10
19 09 10  ---          14 32 52   7.3  84.3 -5.8     -60.0    60      201   19 08 11

19 09 10  MG2016       14 32 52   8.5  81.6 -5.8     -60.3   -10      201   19 09 20
19 12 40  ---          14 36 23   9.3  82.0 -5.7     -60.4   200      226   19 09 11

19 12 40  J2018+0831   14 36 23   8.1  84.7 -5.7     -60.1   -10      226   19 12 50
19 14 10  ---          14 37 53   8.4  84.9 -5.7     -60.1    80      237   19 12 41

19 14 10  MG2016       14 37 53   9.6  82.2 -5.7     -60.5   -10      237   19 14 20
19 17 40  ---          14 41 23  10.3  82.7 -5.6     -60.6   200      263   19 14 11
Schedule for VLBA_FD   (Code Fd )                                   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 ---

19 18 20  J2018+0831   14 42 04   9.3  85.5 -5.6     -60.2    30      263   19 18 20
19 19 20  ---          14 43 04   9.5  85.6 -5.6     -60.2    60      270   19 18 21

19 19 20  MG2016       14 43 04  10.7  82.9 -5.6     -60.6   -10      270   19 19 30
19 22 50  ---          14 46 34  11.4  83.3 -5.6     -60.7   200      296   19 19 21

19 22 50  J2018+0831   14 46 34  10.2  86.0 -5.5     -60.2   -10      296   19 23 00
19 24 20  ---          14 48 05  10.6  86.2 -5.5     -60.3    80      306   19 22 51

19 24 20  MG2016       14 48 05  11.8  83.5 -5.5     -60.7   -10      306   19 24 30
19 27 50  ---          14 51 35  12.5  83.9 -5.5     -60.8   200      332   19 24 21

19 28 30  J2018+0831   14 52 15  11.5  86.7 -5.4     -60.3    30      332   19 28 30
19 29 30  ---          14 53 15  11.7  86.8 -5.4     -60.3    60      340   19 28 31

19 36 10  MG2016       14 59 56  14.3  84.9 -5.3     -61.0   390      340   19 36 10
19 39 40  ---          15 03 27  15.1  85.4 -5.3     -61.1   210      367   19 36 11

19 39 40  J2018+0831   15 03 27  13.9  88.1 -5.3     -60.4   -10      367   19 39 50
19 41 10  ---          15 04 57  14.2  88.3 -5.2     -60.4    80      377   19 39 41

19 41 10  MG2016       15 04 57  15.4  85.5 -5.3     -61.1   -10      377   19 41 20
19 44 40  ---          15 08 28  16.1  86.0 -5.2     -61.2   200      403   19 41 11

19 45 20  J2018+0831   15 09 08  15.1  88.8 -5.2     -60.5    30      403   19 45 20
19 46 20  ---          15 10 08  15.3  89.0 -5.1     -60.5    60      411   19 45 21

19 46 20  MG2016       15 10 08  16.5  86.2 -5.2     -61.2   -10      411   19 46 30
19 49 50  ---          15 13 39  17.2  86.6 -5.1     -61.2   200      436   19 46 21

19 49 50  J2018+0831   15 13 39  16.1  89.4 -5.1     -60.5   -10      436   19 50 00
19 51 20  ---          15 15 09  16.4  89.6 -5.1     -60.5    80      447   19 49 51

19 51 20  MG2016       15 15 09  17.6  86.8 -5.1     -61.3   -10      447   19 51 30
19 54 50  ---          15 18 40  18.3  87.2 -5.0     -61.3   200      473   19 51 21

19 55 30  J2018+0831   15 19 20  17.3  90.1 -5.0     -60.5    30      473   19 55 30
19 56 30  ---          15 20 20  17.5  90.3 -5.0     -60.5    60      480   19 55 31

19 56 30  MG2016       15 20 20  18.7  87.4 -5.0     -61.3   -10      480   19 56 40
20 00 00  ---          15 23 50  19.4  87.9 -4.9     -61.3   200      506   19 56 31

20 00 00  J2018+0831   15 23 50  18.3  90.7 -4.9     -60.5   -10      506   20 00 10
20 01 30  ---          15 25 21  18.6  90.9 -4.9     -60.5    80      516   20 00 01
Schedule for VLBA_FD   (Code Fd )                                   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 ---

20 01 30  MG2016       15 25 21  19.8  88.1 -4.9     -61.4   -10      516   20 01 40
20 05 00  ---          15 28 51  20.5  88.5 -4.9     -61.4   200      542   20 01 31

20 05 40  J2018+0831   15 29 31  19.5  91.4 -4.8     -60.5    30      542   20 05 40
20 06 40  ---          15 30 31  19.7  91.6 -4.8     -60.4    60      550   20 05 41

20 06 40  MG2016       15 30 31  20.9  88.7 -4.8     -61.4   -10      550   20 06 50
20 10 10  ---          15 34 02  21.6  89.2 -4.8     -61.4   200      576   20 06 41

20 10 10  J2018+0831   15 34 02  20.4  92.0 -4.8     -60.4   -10      576   20 10 20
20 11 40  ---          15 35 32  20.8  92.2 -4.7     -60.4    80      586   20 10 11

20 11 40  MG2016       15 35 32  22.0  89.3 -4.7     -61.4   -10      586   20 11 50
20 15 10  ---          15 39 03  22.7  89.8 -4.7     -61.4   200      612   20 11 41

20 15 50  J2018+0831   15 39 43  21.7  92.8 -4.7     -60.4    30      612   20 15 50
20 16 50  ---          15 40 43  21.9  92.9 -4.6     -60.4    60      619   20 15 51

20 16 50  MG2016       15 40 43  23.1  90.0 -4.7     -61.4   -10      619   20 17 00
20 20 20  ---          15 44 14  23.8  90.4 -4.6     -61.4   200      645   20 16 51

20 20 20  J2018+0831   15 44 14  22.6  93.4 -4.6     -60.3   -10      645   20 20 30
20 21 50  ---          15 45 44  23.0  93.6 -4.6     -60.3    80      655   20 20 21

20 21 50  MG2016       15 45 44  24.1  90.6 -4.6     -61.4   -10      655   20 22 00
20 25 20  ---          15 49 15  24.9  91.1 -4.5     -61.4   200      681   20 21 51

20 26 00  J2018+0831   15 49 55  23.9  94.1 -4.5     -60.2    30      681   20 26 00
20 27 00  ---          15 50 55  24.1  94.3 -4.5     -60.2    60      689   20 26 01

20 27 00  MG2016       15 50 55  25.3  91.3 -4.5     -61.4   -10      689   20 27 10
20 30 30  ---          15 54 25  26.0  91.8 -4.4     -61.4   200      715   20 27 01

20 30 30  J2018+0831   15 54 25  24.8  94.7 -4.4     -60.1   -10      715   20 30 40
20 32 00  ---          15 55 56  25.1  94.9 -4.4     -60.1    80      725   20 30 31

20 32 00  MG2016       15 55 56  26.3  92.0 -4.4     -61.4   -10      725   20 32 10
20 35 30  ---          15 59 26  27.1  92.4 -4.3     -61.3   200      751   20 32 01

20 36 10  J2018+0831   16 00 06  26.0  95.5 -4.3     -60.0    30      751   20 36 10
20 37 10  ---          16 01 07  26.3  95.6 -4.3     -60.0    60      758   20 36 11

20 37 10  MG2016       16 01 07  27.5  92.6 -4.3     -61.3   -10      758   20 37 20
20 40 40  ---          16 04 37  28.2  93.1 -4.3     -61.3   200      784   20 37 11
Schedule for VLBA_FD   (Code Fd )                                   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 ---

20 41 20  J2018+0831   16 05 17  27.1  96.2 -4.2     -59.9    30      784   20 41 20
20 42 20  ---          16 06 17  27.4  96.4 -4.2     -59.9    60      792   20 41 21

20 42 20  MG2016       16 06 17  28.6  93.3 -4.2     -61.2   -10      792   20 42 30
20 45 50  ---          16 09 48  29.3  93.8 -4.2     -61.2   200      818   20 42 21

20 45 50  J2018+0831   16 09 48  28.1  96.9 -4.2     -59.8   -10      818   20 46 00
20 47 20  ---          16 11 18  28.4  97.1 -4.1     -59.7    80      828   20 45 51

20 47 20  MG2016       16 11 18  29.6  94.0 -4.1     -61.2   -10      828   20 47 30
20 50 50  ---          16 14 49  30.4  94.5 -4.1     -61.1   200      854   20 47 21

20 51 30  J2018+0831   16 15 29  29.3  97.7 -4.1     -59.6    30      854   20 51 30
20 52 30  ---          16 16 29  29.5  97.8 -4.0     -59.6    60      862   20 51 31

20 52 30  MG2016       16 16 29  30.8  94.7 -4.1     -61.1   -10      862   20 52 40
20 56 00  ---          16 20 00  31.5  95.2 -4.0     -61.0   200      887   20 52 31

20 56 30  J2018+0831   16 20 30  30.4  98.4 -4.0     -59.4    20      887   20 56 30
21 00 00  ---          16 24 00  31.1  98.9 -3.9     -59.3   210      914   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:
     vc_d

   Setup group:    5         Station: VLBA_FD           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=   4100.00   4100.00   4100.00   4100.00   4100.00   4100.00   4100.00   4100.00
   Net SB=         U         U         U         U         U         U         U         U
   IF SB =         U         U         U         U         U         U         U         U
   Pol.  =      RCP       LCP       RCP       LCP       RCP       LCP       RCP       LCP 
   BBC   =         1         2         3         4         5         6         7         8
   BBC SB=         U         U         U         U         U         U         U         U
   IF    =        A         C         A         C         A         C         A         C 

   VLBA FE=     6cm      omit     6cm      omit
   VLBA Synth=  13.6      4.1     13.6

  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:  15  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=    760.25   760.25   792.25   792.25   824.25   824.25   856.25   856.25
   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=     800.25    800.25    832.25    832.25
   CRD bw=      16.00     16.00     16.00     16.00
    Matching frequency sets:  15  16  18  19  20  21  22  23  24

   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 

