The mass function of IC 4665 revisited by the UKIDSS Galactic Clusters Survey

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Table 2

Number of optical candidates with GCS photometry (opt) for different intervals of Z magnitude after the different selection steps.

Range	opt	S1^a	S2^b	S3^c	S4^d	S5^e	R1^f	R2^g

Z = 14–15	91	72	72	72	70	68	74.7	94.4
Z = 15–16	158	139	139	139	138	137	86.7	98.6
Z = 16–17	185	152	152	152	151	150	81.1	98.7
Z = 17–18	139	101	101	101	101	100	71.9	99.0
Z = 18–19	42	28	25	24	24	24	57.1	85.7
Z = 19–20	15	9	9	7	7	7	46.7	77.7
Z = 20–21	15	8	8	6	6	6	40.0	75.0

Z ≤ 17.2	479	390	390	390	386	382	79.7	97.9
Z ≥ 17.2	175	120	117	112	112	111	63.4	92.5

Z = 14–21	654	510	507	502	498	493	75.4	96.6

Notes.

^(a)

Number of optically selected candidates kept after applying the Z − J selection (step 1; S1).

^(b)

Number of candidates kept after the Z − K selection (step 2; S2).

^(c)

Number of candidates kept after the Y − J selection (step 3; S3).

^(d)

Number of candidates kept after the Y − K selection (step 4; S4).

^(e)

Number of candidates kept after the J − K selection (step 5; S5).

^(f)

The R1 percentage refers to the S5/opt ratio.

^(g)

The R2 percentages refers to the S5/S1 ratio.

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