The optical counterparts of accreting millisecond X-ray pulsars during quiescence

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Table 5:

Upper limits ( $3\sigma$ ) on the presence of a source at the X-ray position of XTE J1807-294.
Filter	${\lambda}_{\rm c}$	Limiting magnitude	$A_{\lambda}$	Absolute mag
	(Å)		(mag)
V	5270	>24.3	$2.38 \pm 0.05$	>7.4
R	6440	>24.2	$1.86 \pm 0.05$	>7.8
J	12500	>19.7	$0.63 \pm 0.05$	>4.6

Values in column three are uncorrected for reddening. In column four the dereddening parameters used to correct our optical photometry computed assuming $E(B-V)=0.79 \pm 0.05$ mag are reported. The absolute magnitudes are computed assuming a distance of 8 kpc (Campana et al. 2005; see Sect. 4.2.1 for details).

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