Table 1: Main characteristics of the plate material utilized for the construction of the GSC-II.
Survey Epoch Emulsion Band Depth

+filter

Pal-QV 1983-85 IIaD+W12 V₁₂ 19.5

SERC-J 1975-87 IIIaJ+GG395 B_J 23.0

SERC-EJ 1979-88 IIIaJ+GG395 B_J 23.0

POSS-I E 1950-58 103aE+red E 20.0

POSS-I O 1950-58 103aO O 21.0

POSS-II J 1987-00 IIIaJ+GG385 B_J 22.5

POSS-II F 1987-99 IIIaF+RG610 $R_{\rm F}$ 20.8

POSS-II N 1989-02 IV-N +RG9 I_N 19.5

AAO-SES 1990-00 IIIaF+OG590 $R_{\rm F}$ 22.0

SERC-ER 1990-98 IIIaF+OG590 $R_{\rm F}$ 22.0

SERC-I 1990-02 IV-N +RG715 I_N 19.5

M W Atlas 1978-85 IV-N +RG715 I_N 19

SERC QV 1987-88 IIaD +GG495 V₄₉₅ 14

AAO SR 1996-99 IIIaF+OG590 $R_{\rm F}$ 20

**Table 1:** Main characteristics of the plate material utilized for the construction of the GSC-II.
Survey	Epoch	Emulsion	Band	Depth
		+filter
Pal-QV	1983-85	IIaD+W12	V₁₂	19.5
SERC-J	1975-87	IIIaJ+GG395	B_J	23.0
SERC-EJ	1979-88	IIIaJ+GG395	B_J	23.0
POSS-I E	1950-58	103aE+red	E	20.0
POSS-I O	1950-58	103aO	O	21.0
POSS-II J	1987-00	IIIaJ+GG385	B_J	22.5
POSS-II F	1987-99	IIIaF+RG610	$R_{\rm F}$	20.8
POSS-II N	1989-02	IV-N +RG9	I_N	19.5
AAO-SES	1990-00	IIIaF+OG590	$R_{\rm F}$	22.0
SERC-ER	1990-98	IIIaF+OG590	$R_{\rm F}$	22.0
SERC-I	1990-02	IV-N +RG715	I_N	19.5
M W Atlas	1978-85	IV-N +RG715	I_N	19
SERC QV	1987-88	IIaD +GG495	V₄₉₅	14
AAO SR	1996-99	IIIaF+OG590	$R_{\rm F}$	20

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