Extending the Canada-France brown dwarfs survey to the near-infrared: first ultracool brown dwarfs from CFBDSIR

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Volume 518 (July-August 2010)

A&A, 518 (2010) A39

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Table 1:

Comparison of CFBDS optical surveys with CFBDSIR.
Survey name	z'_AB $10\sigma$ ( $5\sigma$ )	Mid-L maximal	Mid-T maximal	T9 maximal	Final coverage
	detection limit	detection (pc)	detection (pc)	detection (pc)	(sq deg)
CFBDS:RCS-2	22.5 (23.25)	185	80	16	600
CFBDS:CFHTLS-Very Wide	22.8 (23.55)	215	90	18	150
CFBDS:CFHTLS-Wide	23.3 (24.05)	270	115	22	170
Survey Name	$J_{\rm vega}$ $10\sigma$	mid-L maximal	mid-T maximal	T9 maximal	Final coverage
	detection limit	detection (pc)	detection (pc)	detection (pc)	(sq deg)
CFBDSIR	20.0	235	145	35	335

Notes. CFBDS initial detections are made in z' and only better than $10\sigma$ detections are used. CFBDSIR makes the initial detection in J, using only better than $10\sigma$ detections in J, and is only limited in z' by no detections. We define any z'-band object with a signal below the $5\sigma$ threshold as a no detection or ``z'-dropout''.

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