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Table 1.
Key properties of the merged IGAPS survey.
| Property | Value | Comment |
|---|---|---|
| Telescope | 2.5 m Isaac Newton Telescope (INT) | |
| Instrument | Wide Field Camera (WFC) | |
| Detectors | Four 2048 × 4100 pixel CCDs | |
| Pixel scale | 0.33 arcsec pixel−1 | |
| Filters | i, Hα, r, g, URGO | Two r epochs available |
| Magnitude system | Vega | mAB provided as alternative |
| Exposure times (seconds) | i:10, Hα:120, r:30, g:30, URGO:120 | |
| Saturation magnitude | 12(i), 12.5(Hα), 13(r), 14(g) 14.5(URGO) | |
| Limiting magnitude | 20.4(i), 20.5(Hα), 21.5(r), 22.4(g), 21.5(URGO) | Median 5σ detection over the noise. |
| median PSF FWHM (arcsec) | 1.0(i), 1.2(Hα), 1.1(r), 1.3(g), 1.5(URGO) | |
| Survey area | ∼1860 sq. deg | |
| Footprint boundaries | −5° < b < +5°, 30° < ℓ < 215° | |
| Beginning/end dates of observations | August 2003–November 2018 | See Fig. 1 |
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