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S-band gain calibrators

S-band gain calibrators

  • Below are the current lists of MeerKAT S-band gain calibrators, chosen from the existing MeerKAT L-band list (Table 1) and new MeerKAT S-band gain calibrators chosen from ATCA and VLA calibrator lists (Table 2).

  • Some sources have been excluded due to evidence of extended structure.

  • Sources in Table 1 were observed at the S4 sub-band (2625 MHz to 3500 MHz). Each source was observed over several 7.5-minute scans scattered over a period of a few hours. The selection analysis is documented in memos, which will be made available soon.

  • Sources in Table 2 were observed at the S3 sub-band (2406 MHz to 3281 MHz). The selection analysis is documented in a soon to be released memo.

 

The list below is subject to change as we will add more calibrators soon. The primary selection of calibrators is based on an image flux and closure quantities analysis, viz:

  • Closure phases must be less than 5 degrees.

  • Closure amplitudes must be unity with a one-sigma error.

  • Stokes I flux density must be at least 1 Jy/beam at the centre of the band.

  • Stokes I signal-to-noise ratio must be at least 10 at the centre of the band. The Stokes error is estimated by the mean of the standard deviations of the flux at the phase centre of the target field at 10 frequency channels near the centre of the band. These values were found to be similar to the root-mean-square (RMS) error.

  • All secondary sources in the field must not be brighter than 10% of the peak flux of the field target source.

  • A source must not have a resolved fraction,

    , that is significantly larger than unity.

  • A source must have no detectable sub-structure in UV-distance space (amplitude vs baseline).

 

Table 1: MeerKAT S-band gain calibrators, chosen from the existing MeerKAT L-band list.

Calibrator Name

 

RAJ2000

DECJ2000

Flux Density (2.877 - 2.962GHz) / Jy

Flux Density Error (2.877 - 2.962GHz) / Jy

Mean Closure Amplitude / percentage

Mean Closure Phase / deg

Calibrator Name

 

RAJ2000

DECJ2000

Flux Density (2.877 - 2.962GHz) / Jy

Flux Density Error (2.877 - 2.962GHz) / Jy

Mean Closure Amplitude / percentage

Mean Closure Phase / deg

J0010-4153 | 0008-421

00:10:53

-41:53:11

2.63400

0.00830

1.00470

-0.02320

J0022+0014 | 0019-000

00:22:25

+00:14:56.163

2.00370

0.00630

1.01300

-0.01100

J0024-4202 | 0022-423

00:24:43

-42:02:04

3.21400

0.01170

1.00650

0.07080

J0025-2602 | 0023-263

00:25:49

-26:02:13

6.15400

0.02070

1.01130

-0.02430

J0059+0006 | 0056-001

00:59:06

+00:06:51.621

2.06530

0.01000

1.01950

-0.25410

J0108+0134 | 0106+013

01:08:39

+01:35:0.317

4.85730

0.06230

1.05250

0.96060

J0137+3309 | 3C48

01:37:41

+33:09:35.134

10.26100

0.10500

1.00710

0.00930

J0155-4048 | 0153-410

01:55:37

-40:48:42

1.82370

0.00500

1.01280

0.04050

J0203-4349 | 0201-440

02:03:41

-43:49:51

1.79900

0.01970

1.17660

0.57890

J0210-5101 | 0208-512

02:10:46

-51:01:02

3.32970

0.03230

1.05100

0.90690

J0238+1636 | 0235+164

02:38:39

+16:36:59.275

2.10870

0.00600

1.00910

-0.00430

J0240-2309 | 0237-233

02:40:08

-23:09:16

5.30030

0.05300

1.00200

0.04570

J0252-7104 | 0252-712

02:52:46

-71:04:35

3.32230

0.01170

1.00430

-0.01600

J0303-6211 | 0302-623

03:03:51

-62:11:26

2.61970

0.01870

1.00580

0.17570

J0318+1628 | CTA21

03:18:58

+16:28:32.678

5.32870

0.02600

1.00270

-0.03740

J0323+0534 | 0320+053

03:23:20

+05:34:11.891

1.65270

0.00400

1.01310

-0.00160

J0403+2600 | 0400+258

04:03:06

+26:00:1.503

1.30300

0.00570

1.00780

-0.05950

J0405-1308 | 0403-132

04:05:34

-13:08:14

3.42330

0.02700

1.07120

-0.08750

J0409-1757 | 0406-180

04:09:07

-17:57:10

1.43770

0.00200

1.01970

-0.00840

J0420-6223 | 0420-625

04:20:56

-62:23:39

1.88200

0.00470

1.04120

0.05620

J0423-0120 | 0420-014

04:23:16

-01:20:33

3.07670

0.01000

1.00720

0.08910

J0431+2037 | 0428+205

04:31:04

+20:37:34.265

3.61770

0.00900

1.00190

-0.04520

J0440-4333 | 0438-436

04:40:17

-43:33:09

2.87770

0.01970

1.03610

0.07700

J0453-2807 | 0451-282

04:53:15

-28:07:37

1.84800

0.01070

1.02710

-0.48980

J0503+0203 | 0500+019

05:03:21

+02:03:4.677

2.73470

0.00970

1.00440

-0.03030

J0521+1638 | 3C138

05:21:10

+16:38:22.052

6.38630

0.13600

1.01720

0.24070

J0534+1927 | 0531+194

05:34:45

+19:27:21.486

4.18300

0.02870

1.01210

0.14820

J0538-4405 | 0537-441

05:38:50

-44:05:09

3.45270

0.01800

1.01690

0.01520

J0609-1542 | 0607-157

06:09:41

-15:42:41

4.16170

0.01970

1.00280

0.10070

J0616-3456 | 0614-349

06:16:36

-34:56:17

2.30870

0.00430

1.01560

0.02220

J0632+1022 | 0629+104

06:32:15

+10:22:1.676

1.62800

0.01530

1.01440

-0.02890

J0725-0054 | 0723-008

07:25:51

-00:54:57

7.53330

0.06300

1.00790

0.11160

J0730-1141 | 0727-115

07:30:19

-11:41:13

3.42470

0.01530

1.00810

-0.02160

J0735-1735 | 0733-174

07:35:46

-17:35:49

2.33130

0.00870

1.00670

0.12160

J0739+0137 | 0736+017

07:39:18

+01:37:4.618

1.53170

0.00670

1.01820

-0.01160

J0745+1011 | 0742+103

07:45:33

+10:11:12.692

4.15870

0.01670

1.00160

0.06950

J0828-3731 | 0826-373

08:28:05

-37:31:06

2.33570

0.00670

1.00280

0.00510

J0854+2006 | OJ287

08:54:49

+20:06:30.641

5.09330

0.05170

1.00500

-0.01100

J1008+0730 | 3C237

10:08:00

+07:30:16.552

3.88430

0.05300

1.12080

-0.30150

J1058+0133 | 1055+018

10:58:30

+01:33:58.824

4.28700

0.03700

1.01190

0.32940

J1609+2641 | CTD93

16:09:13

+26:41:29.036

3.03600

0.00300

1.00400

0.41180

J1733-1304 | NRAO530

17:33:03

-13:04:50

5.46000

0.03900

1.03180

0.48560

J1830-3602 | 1827-360

18:30:59

-36:02:30

2.83150

0.00850

1.00830

0.01730

J1833-2103 | 1830-210

18:33:40

-21:03:40

12.91800

0.31200

1.07280

0.17390

J1911-2006 | 1908-201

19:11:10

-20:06:55

3.22950

0.00850

1.00540

-0.03280

J1924-2914 | OV-236

19:24:51

-29:14:30

7.32000

0.03300

1.00770

0.04910

J2011-0644 | 2008-068

20:11:14

-06:44:04

2.02000

0.00300

1.04130

-0.55270

J2130+0502 | 2128+048

21:30:33

+05:02:17.475

2.78000

0.00200

1.00500

-0.04850

J2131-1207 | 2128-123

21:31:35

-12:07:05

2.31000

0.00300

1.00910

0.03060

J2134-0153 | 2131-021

21:34:10

-01:53:17

1.95600

0.02000

1.01460

1.01930

J2136+0041 | 2134+004

21:36:39

+00:41:54.213

9.70000

0.01900

1.00120

-0.00370

J2148+0657 | 2145+067

21:48:05

+06:57:38.604

2.90700

0.00400

1.00220

0.05830

J2152-2828 | 2149-287

21:52:04

-28:28:29

1.82300

0.02900

1.12310

0.94120

J2158-1501 | 2155-152

21:58:06

-15:01:09

4.90000

0.03700

1.02140

0.12010

J2206-1835 | 2203-188

22:06:10

-18:35:39

5.18100

0.02600

1.01310

-0.10010

J2212+0152 | 2210+016

22:12:38

+01:52:51.191

1.84800

0.00100

1.00380

-0.08870

J2214-3835 | 2211-388

22:14:39

-38:35:45

1.21300

0.00100

1.00970

-0.03020

J2225-0457 | 3C446

22:25:47

-04:57:01

5.83500

0.05200

1.00700

0.96780

J2232+1143 | CTA102

22:32:36

+11:43:50.904

4.99200

0.04700

1.00720

-0.07430

J2236+2828 | 2234+282

22:36:22

+28:28:57.413

1.62100

0.00100

1.00620

0.21670

J2246-1206 | 2243-123

22:46:18

-12:06:51

1.90100

0.00300

1.00740

-0.18600

J2253+1608 | 3C454.3

22:53:58

+16:08:53.561

14.60500

0.18500

1.01480

0.72140

J1120-2508 | 1117-248

11:20:09

-25:08:08

1.17800

0.01700

1.01170

-0.10340

J1130-1449 | 1127-145

11:30:07

-14:49:27

4.14500

0.10000

1.00770

-0.03390

J1154-3505 | 1151-348

11:54:22

-35:05:29

4.68200

0.13400

1.00720

-0.01900

J1215-1731 | 1213-172

12:15:47

-17:31:45

2.71300

0.05200

1.00930

0.14910

J1239-1023 | 1237-101

12:39:43

-10:23:29

1.48600

0.01700

1.04200

-0.22680

J1311-2216 | 3C283

13:11:39

-22:16:42

2.45400

0.04800

1.07960

-0.32430

J1318-4620 | 1315-460

13:18:30

-46:20:35

1.27300

0.01500

1.01220

0.04200

J1323-4452 | 1320-446

13:23:04

-44:52:34

1.87000

0.02700

1.00560

0.22070

J1337-1257 | 1334-127

13:37:40

-12:57:25

2.39300

0.03900

1.03930

1.32900

J1347+1217 | 1345+125

13:47:33

+12:17:24.240

4.33800

0.04600

1.00510

0.03250

J1427-4206 | 1424-418

14:27:56

-42:06:19

2.86600

0.04800

1.02140

-0.17520

J1445+0958 | OQ172

14:45:16

+09:58:36.073

1.53300

0.00800

1.00800

-0.07860

J1501-3918 | 1458-391

15:01:35

-39:18:39

2.02900

0.02700

1.00650

-0.05320

J1512-0906 | 1510-089

15:12:51

-09:06:00

4.23400

0.05300

1.02850

-0.52200

J1517-2422 | ApLib

15:17:42

-24:22:19

2.42700

0.02900

1.02460

-0.02680

J1550+0527 | 1548+056

15:50:35

+05:27:10.448

2.79400

0.02500

1.01660

-0.03570

J1726-5529 | 1722-554

17:26:50

-55:29:40

3.97500

0.04100

1.00560

0.02410

Table 2: New MeerKAT S-band gain calibrators chosen from ATCA and VLA calibrator lists.

Calibrator Name

RAJ2000

DECJ2000

Flux Density (2.84 GHz) / Jy

Flux Density Error (2.84 GHz) / Jy

Mean Closure Amplitude / percentage

Mean Closure Phase / deg

Calibrator Name

RAJ2000

DECJ2000

Flux Density (2.84 GHz) / Jy

Flux Density Error (2.84 GHz) / Jy

Mean Closure Amplitude / percentage

Mean Closure Phase / deg

1

J0012-3954 | 0012-399

00:12:59.87

-39:54:25.94

0.858

0.00045

1.052

0.0836

2

J0051-4226 | 0048-427

00:51:09.48

-42:26:33.01

0.751

0.0096

1.27

0.167

3

J0133-5200 | 0131-522

01:33:05.76

-52:00:04.02

1.108

0.011

1.154

-0.113

4

J0149+0555 | 0149+059

01:49:22.37

05:55:53.65

0.815

0.0026

1.271

-0.161

5

J0204+1514 | 0204+152

02:04:50.41

15:14:11.07

2.837

0.014

1.03

0.0555

6

J0222-3441 | 0222-346

02:22:56.398

-34:41:28.652

0.788

0.0062

1.214

0.058

7

J0309-6058 | 0308-611

03:09:56.10

-60:58:39.2

2.244

0.031

1.03

-0.0255

8

J0334-4008 | 0332-403

03:34:13.66

-40:08:25.62

1.109

0.016

1.106

-0.0042

9

J0845-5458 | 0843-54

08:45:02.46

-54:58:08.67

0.943

0.014

1.187

0.0033

10

J1131-0500 | 1131-050

11:31:30.52

-05:00:19.64

0.601

0.0029

1.271

-0.916

11

J1145-2250 | 1145-228

11:45:22.04

-22:50:31.58

0.741

0.0073

1.269

0.194

12

J1146-2447 | 1146-247

11:46:08.1

-24:47:33.1

1.395

0.014

1.03

-0.409

13

J1147-0724 | 1147-074

11:47:51.55

-07:24:41.15

1.296

0.0078

1.055

-0.0083

14

J1305-1033 | 1305-105

13:05:33.01

-10:33:19.29

0.908

0.0037

1.127

-0.396

15

J1354-0206 | 1351-018

13:54:06.9

-02:06:03.17

0.793

0.0023

1.128

-0.213

16

J1404-0130 | 1404-015

14:04:45.9

-01:30:22.01

0.577

0.0025

1.174

-0.055

17

J1446+1721 | 1446+173

14:46:35.36

17:21:7.73

0.497

0.00011

1.518

0.562

18

J1504+1029 | 1504+104

15:04:24.99

10:29:39.16

1.184

0.0027

1.052

0.217

19

J1505+0326 | 1505+034

15:05:06.48

03:26:30.62

0.703

0.00019

1.136

-0.288

20

J1507-1652 | 1507-168

15:07:04.79

-16:52:30.278

1.196

0.0014

1.125

0.818

21

J1522-2730 | 1522-275

15:22:37.67

-27:30:10.82

1.045

0.00066

1.033

-0.011

22

J1557-0001 | 1557-000

15:57:51.43

-00:01:50.51

0.635

0.0023

1.094

-0.053

23

J1700-2610 | 1700-261

17:00:53.15

-26:10:51.66

2.548

0.0041

1.0043

-0.0077

24

J1743-0350 | 1743-038

17:43:58.86

-03:50:04.59

3.731

0.0056

1.0023

0.013

25

J1745-0753 | 1745-078

17:45:2

-07:53:03.99

1.057

0.0016

1.0389

-0.075

26

J1937-3958 | 1937-399

19:37:16.21

-39:58:01.51

0.685

0.0021

1.102

-0.0357

27

J1939-1525 | 1939-154

19:39:26.67

-15:25:42.98

1.826

0.00054

1.383

0.413

28

J2000-1748 | 1958-179

20:00:57.09

-17:48:57.797

2.563

0.00059

1.0044

0.126

29

J2011-1546 | 2011-157

20:11:15.71

-15:46:40.3

1.185

0.0005

1.051

0.011

30

J2236-1433 | 2236-145

22:36:34.08

-14:33:22.17

0.716

0.0018

1.36

-0.195

31

J2323-0317 | 2323-032

23:23:31.95

-03:17:04.77

1.352

0.0098

1.143

0.021

32

J2324-3714 | 2324-372

23:24:07.14

-37:14:22.17

0.647

0.0017

1.142

-0.0886

33

J2333-2343 | 2333-237

23:33:55.21

-23:43:40.63

1.095

0.0062

1.055

0.2395

34

J2354-1513 | 2354-152

23:54:30.19

-15:13:10.94

0.789

0.0051

1.0977

-0.259

35

J2359-3133 | 2359-315

23:59:35.45

-31:33:43.78

0.584

0.0038

1.216

0.242

36

J0044-8422 | j0044-8422

00:44:26.77

-84:22:39.76

0.591

0.0087

1.53

0.178

37

J0211+1051 | J0211+1051

02:11:13.17

10:51:34.76

0.546

0.00099

1.5

-0.669

38

J0246-4651 | j0246-4651

02:46:00.09

-46:51:17.53

0.775

0.015

1.232

0.025

39

J0659+0813 | J0659+0813

06:59:18

08:13:31.14

0.861

0.0035

1.825

0.0045

40

J0625-5438 | j0625-5438

06:25:52.20

-54:38:50.64

0.897

0.0023

1.768

-0.318

41

J0738+1742 | J0738+1742

07:38:07.4

17:42:19.16

1.53

0.0033

1.69

-0.0063

42

J0745+1011 | J0745+1011

07:45:33.06

10:11:12.7

3.95

0.0053

1.67

0.00092

43

J1608+1029 | J1608+1029

16:08:46.20

10:29:07.7

1.365

0.0053

1.21

0.06

44

J1728+0427 | J1728+0427

17:28:24.97

04:27:05.04

0.595

0.0052

1.554

-0.091

45

J1734+0926 | J1734+0926

17:34:58.39

09:26:58.39

1.326

0.0084

1.12

-0.191

46

J0016-0015 | 0016-002

00:16:11.088

-00:15:12.425

0.763

0.000093

1.095

0.282

47

J0040-5903 | 0037-593

00:40:07.86

-59:03:52.73

0.556

0.01

1.506

-0.202

48

J0050-4428 | 0048-447

00:50:52.031

-44:28:37.66

0.547

0.0086

1.682

-0.165

49

J0121+0422 | 0121+043

01:21:56.86

04:22:24.79

0.994

0.003

1.127

-0.018

50

J0203+1134 | 0203+115

02:03:46.653

11:34:45.363

0.601

0.0014

1.392

0.091

51

J0231+1322 | 0231+133

02:31:45.89

13:22:54.72

1.752

0.0056

1.069

0.194

52

J0242-2132 | 0242-215

02:42:35.9

-21:32.25.94

0.787

0.011

1.23

-0.016

53

J0319+1901 | 0319+1901

03:19:51.26

19:01:31.57

0.615

0.0062

1.45

-0.037

54

J0501-0159 | 0501-019

05:01:12.8

-01:59:14.35

2.605

0.02

1.03

0.0131

55

J1037-2934 | 1034-293

10:37:16.08

-29:34:02.97

1.219

0.01

1.076

-0.571

56

J1051-3138 | 1051-316

10:51:04.78

-31:38:14.55

0.737

0.0053

1.093

-0.448

57

J1057-2433 | 1057-245

10:57:55.41

-24:33:49.05

0.826

0.0032

1.078

-0.218

58

J1127-1857 | 1124-186

11:27:04.38

-18:57:17.50

0.944

0.0068

1.171

-0.144

59

J1357-1744 | 1357-177

13:57:06.06

-17:44:02.027

1.085

0.0047

1.308

0.356

60

J1415+1320 | 1415+133

14:15:58.82

13:20:23.88

0.768

0.00023

1.1164

0.1

61

J1430+1043 | 1430+107

14:30:09.74

10:43:26.93

0.542

0.000068

1.190

-0.0133

62

J1436+2321 | 1436+233

14:36:40.9

23:21:03.66

0.945

0.00023

1.0723

0.466

63

J1448-1620 | 1448-163

14:48:15.052

-16:20:24.55

1.432

0.0011

1.019

-0.076

64

J1543-0757 | 1543-079

15:43:01.68

-07:57:06.67

1.405

0.0055

1.031

-0.121

65

J1546+0026 | 1546+004

15:46:09.52

00:26:24.60

1.371

0.0047

1.066

0.094

66

J1554-2704 | 1554-270

15:54:02.45

-27:04:40.38

1.027

0.005

1.044

-0.025

67

J1751-2524 | 1751-253

17:51:51.25

-25:24:00.20

0.658

0.001

1.1798

0.132

68

J1811-2055 | 1811-209

18:11:06.79

-20:55:03.33

0.566

0.001

1.582

2.153

69

J1822-0938 | 1822-096

18:22:28.72

-09:38:56.77

3.724

0.012

1.0027

0.0128

70

J1923-2104 | 1923-210

19:23:32.19

-21:04:33.35

0.542

0.0015

1.163

0.066

71

J2219-2756 | 2219-279

22:19:42.58

-27:56:27.17

0.959

0.00026

1.108

0.044

72

J2248-3235 | 2248-325

22:48:38.7

-32:35:51.9

1.498

0.0011

1.043

-0.432

73

J2257-3627 | 2257-364

22:57:10.6

-36:27:43.75

1.1898

0.00035

1.041

0.082

74

J2314-3138 | 2314-316

23:14:48.51

-31:38:39.08

0.533

0.00023

1.347

-0.334

75

J2314-4455 | 2314-449

23:14:09.39

-44:55:49.09

1.74

0.00031

1.026

0.083

76

J2348-1631 | 2348-165

23:48:02.5

-16:31:11.8

1.95

0.0041

1.013

-0.068

77

J0449+1121 | J0449+1121

04:49:07.67

011:21:28.82

0.79

0.014

1.42

-0.379

78

J0459+0229 | J0459+0229

04:59:52.04

02:29:31.12

1.161

0.011

1.103

-0.0098

79

J0502+0609 | J0502+0609

05:02:15.45

06:09:07.6

0.757

0.0015

1.248

-1.038

80

J0509+0541 | J0509+0541

05:09:25.97

05:41:35.45

1.056

0.0038

1.256

0.0168

81

J0522+0113 | J0522+0113

05:22:17.46

01:13:31.25

0.887

0.0018

1.19

0.814

82

J0524-5658 | J0524-5658

05:24:40.25

-56:58:51.94

0.774

0.014

1.43

0.049

83

J0607-6031 | J0607-6031

06:07:55.12

-60:31:52.26

0.696

0.018

1.498

-1.397

84

J1640+1220 | J1640+1220

16:40:47.94

12:20:01.97

1.523

0.014

1.094

0.091

85

J0735+2341 | T0735+2341

07:35:59.93

23:41:03.11

0.692

0.0037

1.92

-0.00093

86

J0952+2828 | T0952+2828

09:52:06.1

28:28:32.81

0.872

0.0021

1.884

0.0065

87

J1126+3345 | T1126+33

11:26:23.67

33:45:28.05

0.659

0.015

1.6

0.145

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