Ultra-deep imaging of NGC 1052-DF2 and NGC 1052-DF4 to unravel their origins

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Table 2.

Surface brightness limiting depths for the different datasets analyzed in this paper.

Surface brightness limiting depth (3σ; 10″ × 10″ boxes)
NGC 1052-DF2

Filter	SDSS ^(a)	DECaLS ^(a)	Dragonfly ^(b)	INT ^(c)	Gemini ^(a)

r-Sloan	26.9 mag arcsec⁻²	28.7 mag arcsec⁻²	–	29.5 mag arcsec⁻²	30.5 mag arcsec⁻²
g-Sloan	27.5 mag arcsec⁻²	29.1 mag arcsec⁻²	29.35 mag arcsec⁻²	30.4 mag arcsec⁻²	30.9 mag arcsec⁻²

NGC 1052-DF4

	SDSS ^(a)	DECaLS ^(a)	Dragonfly	IAC80 ^(d)	Gemini ^(a)
r-Sloan	26.9 mag arcsec⁻²	28.7 mag arcsec⁻²	–	29.3 mag arcsec⁻²	30.6 mag arcsec⁻²

Notes.

^(a)

The limiting surface brightness has been derived using the methodology described in Appendix A of Román et al. (2020).

^(b)

Keim et al. (2022). The value given in the table corresponds to the limiting depth given in https://arxiv.org/pdf/2109.09778v1 (see their Sect. 3.3).

^(c)

Montes et al. (2021).

^(d)

Montes et al. (2020).

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