2025ApJ...995..161T

Query : 2025ApJ...995..161T

2025ApJ...995..161T - Astrophys. J., 995, 161 (2025/December-3)

The First LWA Swarm Calibrator Survey.

TAYLOR C.A., TAYLOR G.B., DOWELL J. and PEZZAIOLI S.

Abstract (from CDS):

The LWA Swarm is an aperture synthesis telescope consisting of interconnected Long Wavelength Array (LWA) stations autonomously making joint observations. In 2024, the LWA collaboration completed commissioning for the LWA-North Arm, a 64-element “swarm” station, and construction is underway to build two additional LWA Swarm stations in Arizona and Texas. By early 2026, the LWA Swarm will be a six-station long baseline interferometer, capable of arcsecond resolution imaging with millijansky sensitivity. Here we use the three-element interferometer consisting of LWA1, LWA-SV, and LWA-NA to survey 30 radio sources as candidate calibrators for the LWA Swarm. Of these 30 sources observed we find 25 viable calibrators and present images of all sources at 66 MHz. Based on the properties of the observed calibrators, we conclude that many other suitable calibrators will be available to the LWA Swarm. In anticipation of the availability of this new instrument, we provide a preliminary guide to observing and calibrating LWA Swarm data.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Calibration - Radio sources - Very long baseline interferometry

Simbad objects: 51

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Number of rows : 51
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NVSS J003607+585548 BLL 00 36 07.49706720 +58 55 45.8990040           ~ 12 1
2 3C 20 Sy2 00 43 09.18053760 +52 03 36.1486440   19.0       ~ 221 1
3 8C 0052+681 Sy2 00 56 01.122 +68 22 29.53           ~ 74 1
4 2C 94 Sy2 01 08 52.8701830824 +13 20 14.262799812   15.19       ~ 494 2
5 3C 41.0 rG 01 26 44.388 +33 13 11.22   21       ~ 172 1
6 2E 437 Sy1 01 36 24.4208152464 +20 57 27.522990972   18.15 18.10     ~ 367 2
7 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
8 26P 3 Sy1 02 38 02.358 +59 11 50.02           ~ 80 1
9 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
10 NAME Per B SyG 04 37 04.37535450 +29 40 13.8179631   21.7       ~ 533 2
11 3C 134 rG 05 04 42.190 +38 06 11.40   20       ~ 90 1
12 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
13 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
14 3C 154.0 QSO 06 13 50.1393487560 +26 04 36.718432032           ~ 164 0
15 2C 553 QSO 06 27 10.125 -05 53 06.21           ~ 165 1
16 3C 196 Sy1 08 13 36.0561170112 +48 13 02.644966020   18.36 17.79     ~ 578 2
17 3C 208 QSO 08 53 08.6093021736 +13 52 54.845406984   17.76 17.42     ~ 257 1
18 3C 216.0 Bla 09 09 33.49714902 +42 53 46.4821036   19.98 19.42 18.220   ~ 520 1
19 PSR B0950+08 Psr 09 53 09.31210 +07 55 36.9000           ~ 806 2
20 7C 095855.9+290131 Sy2 10 01 49.5227371368 +28 47 08.943487440   18.21 17.27     ~ 447 1
21 3C 244.1 QSO 10 33 33.9860997312 +58 14 35.611906344   19.0 19.0     ~ 191 1
22 3C 254 QSO 11 14 38.7251836992 +40 37 20.329281156   17.62 17.42     ~ 331 2
23 3C 268.1 rG 12 00 20.53 +73 00 45.7   22       ~ 149 1
24 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
25 7C 125441.29+473632.00 SyG 12 56 57.485 +47 20 20.23   22.0       ~ 285 1
26 4C 31.42 Rad 13 28 24.640 +30 44 30.37     15.5     ~ 21 1
27 NVSS J133053+303758 Rad 13 30 53.7 +30 38 00           ~ 2 1
28 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
29 SDSS J133148.51+303147.6 QSO 13 31 48.5118893112 +30 31 47.641651608           ~ 14 1
30 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
31 3C 298.0 Bla 14 19 08.1802187928 +06 28 34.802854680   17.12 16.79     ~ 422 1
32 3C 309.1 Bla 14 59 07.58390804 +71 40 19.8668093   17.24 16.78 17.2   ~ 509 1
33 NAME 3C 330G2 Sy2 16 09 34.92456720 +65 56 37.8351240   20.33       ~ 280 1
34 NGC 6166 Sy2 16 28 38.24470063 +39 33 04.2335319   12.78 11.78     ~ 793 2
35 MCG+01-43-006 SyG 16 51 07.9886687784 +04 59 35.547131472     18.25     ~ 502 1
36 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
37 3C 368.0 rG 18 05 06.358 +11 01 32.55   21.5       ~ 253 1
38 2C 1569 Bla 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 713 1
39 3C 388.0 SyG 18 44 02.3840387736 +45 33 29.628672300   16.91 15.56     ~ 338 1
40 3C 394 Rad 18 59 23.363 +12 59 12.10           ~ 63 1
41 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
42 3C 409 Rad 20 14 27.597 +23 34 52.94           ~ 96 1
43 3C 410 QSO 20 20 06.5632764672 +29 42 14.180763312   19.5       ~ 125 0
44 3C 427.1 rG 21 04 06.87480 +76 33 10.2231   23.3 21.1     ~ 157 1
45 3C 430 QSO 21 18 19.0965352800 +60 48 07.351475472   15       ~ 114 1
46 3CR 431 Rad 21 18 52.469 +49 36 59.12           ~ 48 2
47 3C 433.0 Sy2 21 23 44.5778423928 +25 04 27.670672416   17.660 16.350     ~ 338 1
48 2C 1820 SyG 21 55 52.324 +38 00 28.51   19.20       ~ 234 1
49 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
50 BD+19 5116 ** 23 31 52.17898 +19 56 14.1505 12.737 11.749 10.165 8.982 7.446 M3.5V 469 0
51 3C 468.1 rG 23 50 54.845 +64 40 19.59           ~ 73 1

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