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Table 1
Summary of the field positions, filter characteristics, exposure times, and seeing for the narrow-band (on-band) and broad-band (off-band) images.
| [OIII] filter | V-band filter | |||||||||||
| Field | α(J2000) | δ(J2000) | λ c | FWHM | Exposure | S FWHM | λ c | FWHM | Exposure | S FWHM | ||
|
|
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| (hh mm ss) | (o ′ ″) | (Å) | (Å) | (s) | (″) | ( Å) | (Å) | (s) | (″) | |||
|
|
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| M 87 SUB1 | 12 30 25.230 | +12 35 03.85 | 5029 | 74 | 11 × 1200 | 0.96 | 5500 | 956 | 13 × 360 | 1.00 | ||
| M 87 SUB2 | 12 31 15.581 | +12 07 22.33 | 5029 | 74 | 10 × 1200 | 0.98 | 5500 | 956 | 14 × 360 | 0.8 | ||
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