Table 1
HST and Spitzer photometry of the 8 o’clock arc images A2 and A3.
| A2 | A3 | ||
| Filter | Band | AB magnitude | AB magnitude |
|
|
|||
| F450W | B | 21.94 ± 0.10 | 22.04 ± 0.10 |
| F606W | V | 21.36 ± 0.10 | 21.37 ± 0.10 |
| F814W | I | 21.10 ± 0.10 | 21.21 ± 0.10 |
| F110W | J | 21.12 ± 0.10 | 21.27 ± 0.10 |
| F160W | H | 20.77 ± 0.10 | 20.83 ± 0.10 |
| F160W − 3.6 μm | IR color | 0.61 ± 0.12 | |
| F160W − 4.5 μm | IR color | 0.93 ± 0.12 | |
| F160W − 5.8 μm | IR color | 0.94 ± 0.12 | |
| F160W − 8.0 μm | IR color | 0.78 ± 0.12 | |
Notes. The tabulated AB magnitudes of A2 and A3 correspond to the total photometry of the components main+blob as defined in Sect. 3.2. The errors on the magnitudes were derived from the noise measured in the images, scaled to the size of the aperture used for color measurements. A 0.05 mag error in the zero-point calibration was added in quadrature.
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