VLA calibrators at Q-band. VLA Test Memo #192 Claire Chandler, 04/17/95 The following is a list of measurements of sources in the VLA calibrator manual at 43 GHz, obtained to determine whether these objects are bright enough to be used as calibrators at Q-band. Most of the sources have not been checked for source structure at 43 GHz, but it is expected that at higher frequencies the emission will be dominated by a compact core, and so can be assumed to be unresolved. The emission is also likely to be variable. Sources brighter than 1 Jy are fine as calibrators. Sources fainter than 1 Jy but brighter than about 0.5 Jy are probably OK under good observing conditions (short baselines, dry and stable atmosphere), but I suggest that at present they only be used if nothing brighter is within about 15 degrees of the program source. I do not recommend using sources fainter than 0.5 Jy as phase calibrators. Source Flux error origin of measurement (1950) (Jy) (Jy) (*=repeat if possible) 0003-066 1.47 0.03 VD 0007+171 0.470 0.007 MH 0016+731 0.91 0.04 VD 0022+390 0.408 0.004 MH 0035+413 0.299 0.003 MH 0039+230 0.435 0.007 MH 0048-097 1.43 0.05 VD 0055+300 0.606 0.003 MH 0102+480 0.250 0.005 MH 0106+013 1.20 0.12 VD 0108+388 0.062 0.004 MH 0112-017 1.06 VD* 0113-118 0.87 0.04 VD 0119+041 0.55 0.02 VD 0133+476 1.62 0.08 VD 1.342 0.004 MH 0138-097 0.55 VD* 0146+056 0.566 0.002 MH 0147+187 0.247 0.003 MH 0149+218 0.88 0.04 CC 1.024 0.001 MH 0201+113 0.565 0.003 MH 0202+149 1.32 0.05 CC 1.270 0.005 MH 0202+319 0.73 0.02 CC 0212+735 2.00 0.31 VD 1.60 0.16 G94 0218+357 0.83 0.01 CC 0221+067 0.71 0.06 VD 0224+671 1.37 0.21 VD 0.92 0.05 LR 0229+131 0.44 0.02 CC 0.478 0.003 MH 0234+285 1.80 0.09 VD 1.852 0.002 MH 0235+164 3.54 0.19 VD 1.890 0.003 MH 0237-027 0.38 0.04 CC* 0239+108 1.383 0.003 MH 0248+430 0.385 0.003 MH 0259+121 0.136 0.002 MH 0300+470 1.23 0.19 VD 0.90 0.04 G94 0.830 0.002 MH 0306+102 0.42 0.02 CC 0.466 0.005 MH 0309+411 0.576 0.002 MH 0316+162 0.146 0.005 MH 0316+413 14.3 1.74 VD 21.1 0.37 G94 10.2 0.90 LR 0317+188 0.041 0.005 MH 0319+121 0.250 0.003 MH 0326+277 0.191 0.004 MH 0327-241 0.39 0.06 CC* 0333+321 1.94 0.57 VD 1.01 0.07 LR 0336-019 2.52 0.60 VD 0338-214 0.43 0.08 CC* 0342+147 0.247 0.004 MH 0346-279 1.42 0.29 VD 0355+508 5.74 1.84 VD 2.90 0.20 G94 0400+258 0.39 0.03 LR 0.336 0.002 MH 0406+121 0.488 0.004 MH 0414-189 0.86 0.05 CC 0420-014 3.13 0.52 VD 7.96 0.06 G94 0420+417 0.959 0.004 MH 0428+205 0.30 0.01 CC 0.36 0.02 LR 0429+415 0.37 0.03 CC 0.578 0.004 MH 0430+052 2.48 0.39 VD 1.438 0.003 MH 0454-234 1.75 0.38 VD 0454+066 0.321 0.002 MH 0458-020 2.99 0.52 VD 0458+138 0.174 0.002 MH 0459+135 0.543 0.002 MH 0500+019 0.33 0.02 CC 0506+101 0.688 0.002 MH 0507+179 1.02 0.07 LR 1.003 0.003 MH 0511-220 0.52 0.06 CC 0518+165 0.42 0.02 CC 0528+134 8.54 1.52 VD 5.85 0.04 G94 0529+075 4.21 0.68 VD 1.75 0.03 CC 1.694 0.002 MH 0536+145 0.685 0.002 MH 0537+531 0.293 0.004 MH 0538+474 0.234 0.002 MH 0538+498 0.58 0.05 CC 0.90 0.02 LR 0539-057 0.74 0.04 CC 0.62 0.02 LR 0552+398 4.27 0.89 VD 4.57 0.18 G94 2.482 0.002 MH 0605-085 3.62 0.66 VD 2.20 0.20 CC 0607-157 6.25 1.27 VD 0611+131 0.301 0.001 MH 0642+449 2.18 0.12 VD 1.429 0.001 MH 0646+600 0.285 0.003 MH 0648-165 1.89 0.31 VD 0650+371 0.462 0.002 MH 0657+172 0.736 0.004 MH 0710+439 0.279 0.002 MH 0716+714 0.23 VD* 0.67 0.01 G94 0723-008 2.01 0.17 VD 0727-115 3.35 0.01 VD 2.24 0.11 LR 0733-174 0.35 0.05 CC 0735+178 2.89 0.50 VD 1.359 0.005 MH 1.73 0.22 CC 0736+017 2.07 0.38 VD 0738+272 0.125 0.001 MH 0741-063 0.24 0.03 CC 0742+103 0.550 0.003 MH 0.64 0.07 CC 0742+318 0.149 0.003 MH 0743-006 0.73 0.23 VD 0745+241 1.26 0.17 VD 0.838 0.002 MH 0746+483 0.33 0.06 CC 0748+126 4.42 0.69 VD 2.446 0.004 MH 3.47 0.45 CC 0754+100 2.47 0.41 VD 1.063 0.003 MH 0804+499 1.52 0.11 VD 0805+410 0.921 0.003 MH 0808+019 1.02 0.41 VD 0814+425 0.69 0.03 VD 0818-128 0.61 0.30 VD 0820+560 1.48 0.09 VD 0.506 0.005 MH 0823-223 0.46 0.06 CC 0823+033 2.06 0.29 VD 0828+493 0.305 0.002 MH 0.28 0.06 CC 0829+046 1.28 0.13 VD 0831+557 0.322 0.002 MH 0.34 0.08 CC 0833+585 0.23 0.05 CC 0834-201 1.54 0.27 VD 0836+710 0.84 0.21 CC 0850+581 0.237 0.006 MH 0851+202 2.62 0.23 VD 2.65 0.03 G94 0859-140 1.80 0.62 VD 0859+470 0.485 0.004 MH 0.39 0.06 CC 0906+015 0.55 0.09 VD 0913+391 0.345 0.005 MH 0917+449 2.24 0.25 VD 1.274 0.004 MH 0917+624 1.54 0.16 VD 0.987 0.004 MH 0919-260 0.14 0.05 CC* 0923+392 9.61 0.95 VD 7.49 0.05 G94 6.526 0.004 MH 0925-203 0.37 0.04 CC 0941+522 0.318 0.003 MH 0945+408 1.56 0.30 VD 0.767 0.001 MH 0953+254 1.06 0.10 VD 0954+556 0.623 0.002 MH 0954+658 1.07 0.13 VD 0955+327 0.89 0.12 CC 0955+476 1.00 0.07 LR 0.732 0.005 MH 1011+250 0.46 0.06 CC 1012+232 0.64 0.06 VD 1.03 0.15 CC 1034-293 1.49 0.28 VD 1044+719 0.54 0.11 CC 1045-188 0.96 0.11 VD 1055+018 3.01 0.40 VD 1101+384 0.57 0.05 VD 1124-186 1.08 0.15 VD 1144+402 0.99 0.03 VD 1150+497 1.78 0.08 VD 1226+023 41.1 0.18 G94 27.2 4.36 VD 1228+126 12.0 0.28 G94 1244-255 1.22 0.24 VD 1253-055 19.7 0.10 G94 31.9 7.37 VD 1308+326 3.75 0.16 G94 3.24 0.12 VD 1328+307 1.79 0.04 G94 1.86 0.26 O94 1334-127 6.63 0.15 VD 1354+195 2.13 0.68 VD 1409+524 0.67 0.18 G94 1413+135 1.81 0.18 G94 4.25 0.52 VD 1418+546 0.89 0.04 VD 1502+106 1.76 0.20 VD 1510-089 3.77 0.23 VD 1511-100 1.31 0.06 VD 1514-241 2.39 0.21 VD 1546+027 1.21 0.17 G94 2.76 0.24 VD 1548+056 2.30 0.29 VD 1606+106 0.88 0.13 VD 1611+343 5.46 1.30 VD 1622-297 1.33 0.04 LR 1633+382 4.49 1.31 VD 1637+574 2.64 0.75 VD 1638+398 1.04 0.02 G94 1641+399 11.3 0.10 G94 11.2 2.97 VD 1655+077 2.56 0.52 VD 1657-261 2.37 0.36 VD 1725+044 1.09 0.23 VD 1730-130 8.98 1.87 VD 1739+522 0.91 0.27 VD 1741-038 5.06 1.05 VD 1749+096 7.86 2.13 VD 1800+440 0.96 0.07 CC 1803+784 1.92 0.03 G94 2.37 0.39 VD 1807+698 1.69 0.34 VD 1810+010 0.37 0.01 LR 1823+568 1.93 0.36 VD 1828+487 2.36 0.39 VD 1849+670 1.41 0.07 CC 1908-201 1.30 0.07 LR 1.39 0.04 VD 1.64 0.06 CC 1921-293 9.80 0.40 LR 9.10 0.86 VD 1923+210 1.09 0.07 LR 0.99 0.10 VD 1928+738 2.65 0.04 G94 2.22 0.44 VD 1936-155 1.29 0.05 CC 1954+513 1.43 0.13 VD 1957+406 4.04 0.02 G94 1958-179 0.45 0.04 VD 2005+403 1.27 0.05 LR 1.51 0.13 VD 2007+777 2.02 0.05 G94 1.30 0.24 VD 2008-159 0.78 0.02 VD 2021+317 1.65 0.10 VD 2021+614 1.24 0.19 VD 2022+542 0.73 0.04 LR 2023+336 2.79 0.10 VD 2037+511 3.03 0.26 VD 2059+034 1.15 0.07 CC 2121+053 0.52 0.04 VD 2128-123 1.75 0.08 VD 2131-021 1.05 0.04 VD 2134+004 2.92 0.12 VD 2145+067 7.65 0.21 VD 2155-152 1.22 0.08 VD 2200+420 4.18 0.30 G94 2.53 0.13 VD 2201+315 1.65 0.08 VD 2203-188 1.00 0.05 CC 2210-257 0.51 0.03 CC 2216-038 1.17 0.03 VD 2223-052 2.13 0.15 VD 2227-088 2.29 0.14 CC 2229+695 0.28 0.01 LR 0.34 0.02 CC 2230+114 1.76 0.09 CC 2234+282 0.84 0.08 VD 2243-123 1.64 0.05 VD 2251+158 10.9 0.08 G94 17.1 0.75 VD 2255-282 1.74 0.11 VD 2318+049 1.08 0.10 VD 2345-167 1.70 0.03 VD 2355-106 0.94 0.05 CC VD=Vivek Dhawan, VLA measurements CC=Claire Chandler, VLA measurements LR=Luis Rodriguez, VLA measurements MH=Mark Holdaway, VLA measurements G94=Greve et al. (1994) A&A 286, 654, IRAM 30-m measurements O94=Ott et al. (1994) A&A 284, 331, Bonn 100-m measurements Bright sources not in VLA calibrator list with Q-band flux density measurements, from Mark Holdaway. Source Flux error RA(2000) Dec(2000) (1950) (Jy) (Jy) 0003+380 0.775 0.011 00 05 57.1750 +38 20 15.156 0007+205 0.140 0.006 00 10 28.7420 +20 47 49.719 0011+188 0.303 0.005 00 13 56.3780 +19 10 41.953 0017+257 0.237 0.003 00 19 39.7810 +26 02 52.344 0021+464 0.239 0.002 00 24 21.5390 +46 44 06.219 0037+487 0.107 0.004 00 39 46.9990 +49 00 33.188 0039+568 0.323 0.006 00 42 19.4520 +57 08 36.562 0046+316 0.207 0.007 00 48 47.1440 +31 57 25.094 0059+581 2.403 0.004 01 02 45.7630 +58 24 11.125 0110+495 0.805 0.013 01 13 27.0070 +49 48 24.062 0120+259 0.155 0.004 01 23 43.0430 +26 15 22.422 0121+560 0.109 0.007 01 24 25.8250 +56 18 51.875 0123+257 0.245 0.003 01 26 42.7910 +25 59 01.266 0129+431 0.380 0.002 01 32 44.1260 +43 25 32.656 0140+120 0.75 0.25 01 43 31.0930 +12 15 42.945 0151+474 0.363 0.005 01 54 56.2900 +47 43 26.531 0202+145 0.159 0.002 02 05 13.1170 +14 44 32.375 0206+136 0.402 0.002 02 09 36.0000 +13 52 00.750 0222+185 0.424 0.003 02 25 04.6700 +18 46 48.766 0223+341 0.359 0.001 02 26 10.3340 +34 21 30.250 0227+403 0.180 0.003 02 30 45.7070 +40 32 53.094 0239+175 0.229 0.003 02 42 24.2700 +17 42 58.844 0241+131 0.133 0.006 02 44 45.6930 +13 20 07.219 0251+393 0.323 0.004 02 54 42.6310 +39 31 34.688 0307+380 0.236 0.010 03 10 49.8830 +38 14 53.844 0318+438 0.122 0.004 03 21 36.8730 +43 59 22.500 0322+222 0.793 0.023 03 25 36.8140 +22 24 00.422 0323+151 0.115 0.003 03 26 31.6330 +15 21 26.750 0327+467 0.177 0.002 03 30 32.6290 +46 56 23.344 0345+460 0.572 0.004 03 49 18.7420 +46 09 59.656 0350+465 0.578 0.005 03 54 30.0160 +46 43 18.750 0354+599 0.403 0.004 03 59 02.6410 +60 05 22.062 0411+341 0.498 0.004 04 14 37.2580 +34 18 51.125 0412+447 0.506 0.008 04 15 56.5230 +44 52 49.656 0414+548 0.115 0.004 04 18 19.3400 +54 57 15.312 0415+398 0.293 0.003 04 19 22.5510 +39 55 28.969 0424+328 0.107 0.003 04 28 05.8160 +32 59 51.969 0424+414 0.211 0.011 04 27 46.0430 +41 33 01.094 0436+426 0.172 0.006 04 40 07.8750 +42 44 40.250 0442+389 0.139 0.006 04 46 11.4920 +39 00 17.094 0503+466 0.177 0.003 05 07 23.6600 +46 45 42.344 0506+056 0.397 0.004 05 09 25.9610 +05 41 35.340 0510+559 0.181 0.002 05 14 18.6990 +56 02 11.062 0515+067 0.219 0.003 05 17 51.3440 +06 48 03.191 0532+506 0.227 0.003 05 36 20.2340 +50 38 26.250 0533+446 0.110 0.002 05 37 30.0620 +44 41 03.531 0548+378 0.620 0.004 05 52 17.9380 +37 54 25.281 0602+405 0.281 0.002 06 05 50.8590 +40 30 08.094 0609+413 0.244 0.003 06 12 51.1880 +41 22 37.406 0609+607 0.177 0.003 06 14 23.8670 +60 46 21.750 0610+510 0.113 0.002 06 14 49.1600 +51 02 13.125 0612+570 0.465 0.008 06 17 16.9220 +57 01 16.375 0618+588 0.127 0.002 06 23 21.7770 +58 49 01.875 0633+596 0.343 0.004 06 38 02.8750 +59 33 22.188 0651+410 0.162 0.003 06 55 10.0230 +41 00 10.125 0656+082 0.177 0.001 06 59 18.0000 +08 13 30.930 0714+457 0.869 0.018 07 17 51.8440 +45 38 03.250 0722+145 0.517 0.007 07 25 16.8050 +14 25 13.734 0723+488 0.102 0.002 07 27 03.1020 +48 44 10.094 0724+571 0.379 0.005 07 28 49.6330 +57 01 24.375 0729+259 0.329 0.006 07 32 56.2810 +25 48 38.734 0730+504 0.480 0.003 07 33 52.5230 +50 22 09.062 0737+289 0.132 0.004 07 40 33.5470 +28 52 47.250 0738+313 0.943 0.003 07 41 10.7110 +31 12 00.219 0738+491 0.385 0.005 07 42 02.7500 +49 00 15.594 0740+173 0.134 0.001 07 43 05.1090 +17 14 24.406 0747+185 0.308 0.004 07 50 00.3280 +18 23 11.422 0751+095 0.101 0.002 07 53 51.9450 +09 24 19.758 0821+394 1.270 0.002 08 24 55.4840 +39 16 41.906 0821+621 0.190 0.004 08 25 38.6090 +61 57 28.562 0830+425 0.301 0.004 08 33 53.8830 +42 24 01.844 0833+585 0.217 0.005 08 37 22.4060 +58 25 01.812 0836+426 0.176 0.003 08 39 56.5620 +42 27 55.844 VLA calibrators bright at 90 GHz which might also be OK at Q band. Do not use these sources unless absolutely necessary, until 43 GHz measurement have been obtained. Source 90 GHz Flux origin of measurement (1950) (Jy) 0007+106 0.8 HL 1.8 TB 0118-272 0.6 HL 0119+115 0.6 HL 0122-003 0.5 HL 0135-247 1.0 HL 0238-084 1.7 TB 0403-132 1.9 HL 0405-123 0.6 TB 0426-380 1.0 HL 0440-003 0.6 HL 0.7 TB 0451-282 0.6 HL 0514-161 1.4 HL 0521-365 2.2 HL 0528-250 0.1 TB 0646-306 1.0 HL 0805-077 1.2 HL 0827+243 0.8 HL 0838+133 0.6 HL 1032-199 0.7 HL 1039+811 1.0 HL 1116+128 0.7 HL 1127-145 0.6 HL 1.1 TB 1150+812 0.8 HL 1156+295 1.6 HL 1.0 TB 1213-172 1.5 HL 1219+285 0.6 HL 0.3 TB 1243-072 0.8 HL 1302-102 0.6 HL 1313-333 2.1 HL 1328+254 0.5 HL 1345+125 1.0 HL 0.4 TB 1351-018 1.0 HL 1354-152 0.3 TB 1357+769 0.5 HL 1406-076 0.6 HL 1435-218 0.6 HL 1508-055 0.5 HL 1519-273 0.5 HL 1532+016 0.5 HL 1538+149 0.8 HL 1555+001 0.6 HL 1.0 TB 1622-253 1.3 TB 1624+416 0.6 HL 1642+690 0.8 HL 0.7 TB 1652+398 0.8 HL 0.6 TB 1656+053 0.3 TB 1716+686 0.4 HL 1732+389 1.1 HL 1749+701 0.5 HL 0.4 TB 1758+388 0.8 HL 1800+440 0.7 HL 1830-210 2.5 HL 1842+681 0.7 HL 1845+797 0.2 TB 1849+670 0.7 HL 2029+121 0.9 HL 2059+034 0.9 HL 2113+293 0.5 HL 2136+141 0.8 HL 2144+092 0.6 HL 2149-306 0.8 HL 2210-257 0.7 HL 2227-088 0.7 HL 2230+114 1.7 HL 2.1 TB 2240-260 0.8 HL 2329-162 0.8 HL HL=Harvey Listz, NRAO 12-m measurements TB=Tom Balonek, NRAO 12-m measurements