Table 1
Observational parameters of the radio observations.
| Epoch | Project | Array | Observing | ν | Phase | Pν | Weighting | Convolving beam | rms |
| label | date | (GHz) | calibrator | ( Jy/beam) | (mas) | ( μJy/beam) | |||
|
|
|||||||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|
|
|||||||||
| EM | – | e-MERLIN | 2011-03-19 | 6.9 | J1324 + 3622 | 0.07 | N,1 | 165.23 × 88.35 at 11.6° | 44.0 |
| V1 | BN026 | VLBA | 2004-08-13 | 5.0 | J1317 + 3425 | 0.25 | N,0 | 3.71 × 1.47 at −0.1° | 84.7 |
| V2 | BN027 | VLBA | 2004-09-20 | 5.0 | J1310 + 3220 | 1.41 | N,1 | 3.48 × 1.65 at 17.6° | 119.0 |
| V3 | BN027 | VLBA | 2005-07-11 | 5.0 | J1310 + 3220 | 1.19 | N,2 | 3.43 × 1.78 at 11.5° | 107.0 |
| V4 | EP055 | EVN | 2006-06-15 | 5.0 | J2333 + 3901 | 0.81 | U,1 | 7.99 × 6.00 at −81.3° | 162.0 |
| V5 | RR006 | e-EVN | 2011-03-23 | 5.0 | J1317 + 3425 | 0.35 | U,1 | 9.20 × 6.36 at −76.1° | 66.2 |
| V6 | BC196 | VLBA | 2011-05-15 | 8.4 | J2330 + 3348 | 0.33 | N,0 | 2.41 × 1.17 at −8.3° | 174.0 |
Notes. Phase reference sources used in each observation are listed along with their associated peak intensities (Cols. 6 and 7). For the different IC 883 maps, Col. 8 lists the weighting parameters used in the imaging process: N = natural, U = uniform, and the number corresponds to the value of the ROBUST parameter). Column 9 lists the resolution, and Col. 10 the attained root mean square (rms) noise.
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