Photometric multi-site campaign on the open cluster NGC 884 - I. Detection of the variable stars

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Table 1:

Observing sites and equipment.
ID		Observatory	Country	Longitude	Latitude	Altitude	Telescope		CCD camera/chip	FOV	Resolution	Filters
										(arcmin²)	(arcsec/pixel)
1		OAN-SPM	Mexico	117.46 $^\circ$ W	31.04 $^\circ$ N	2776 m	150-	cm	(Simultaneous uvby photometer)	-	-	Strömgren ubvy
2	a	Baker	Missouri, USA	93.04 $^\circ$ W	37.40 $^\circ$ N	418 m	40-	cm	Apogee 7p	6 $\times$ 6	0.35	Johnson V
2	b								Roper Sci. 1340B	12.1 $\times$ 11.7	0.54	Johnson BV
3	a	ORM	La Palma, Spain	17.88 $^\circ$ W	28.76 $^\circ$ N	2333 m	120-	cm	EEV 40-42 (Merope)	6.5 $\times$ 6.5	0.19	Geneva-Cousins $UBV(I_{\rm C}$ )
3	b						(Mercator)		P7 (photometer)	-	-	Geneva UB₁BB₂V₁VG
4		OFXB	Switzerland	7.60 $^\circ$ E	46.20 $^\circ$ N	2200 m	60-	cm	Apogee 47p	20 $\times$ 20	1.15	Johnson BVI
5		Michelbach	Austria	15.76 $^\circ$ E	48.09 $^\circ$ N	636 m	40-	cm	Apogee 6	26 $\times$ 26	1.52	Johnson BVI
6		Vienna	Austria	16.34 $^\circ$ E	48.23 $^\circ$ N	241 m	80-	cm (vlt)	Apogee 7p	14.3 $\times$ 9.5	0.56	Johnson BVI
7		Bia $\l$ ków	Poland	16.66 $^\circ$ E	51.47 $^\circ$ N	220 m	60-	cm	Andor Tech. iKon DW432	12.9 $\times$ 11.9	0.62	Johnson-Cousins $BV(I_{\rm C}$ )
8		Athens	Greece	23.78 $^\circ$ E	37.97 $^\circ$ N	250 m	40-	cm	SBIG ST-8	15 $\times$ 10	0.59/1.77	Bessell VI
9		EUO	Turkey	27.28 $^\circ$ E	38.40 $^\circ$ N	795 m	40-	cm	Apogee Alta	9.2 $\times$ 9.2	0.54	Bessell BV
10	a	TUG	Turkey	30.34 $^\circ$ E	36.82 $^\circ$ N	2555 m	150-	cm	Fairchild CCD447 (TFOSC)	13.5 $\times$ 13.5	0.79	Bessell UBV
10	b						40-	cm (T40)	SBIG ST-8	13.8 $\times$ 9.2	0.54	Bessell BV
11		Xinglong	China	117.57 $^\circ$ E	40.40 $^\circ$ N	960 m	50-	cm	VersArray 1300B	22 $\times$ 22	1.00	Johnson V
12		SOAO	South Korea	128.46 $^\circ$ E	36.93 $^\circ$ N	1378 m	61-	cm	SITe	20.5 $\times$ 20.5	0.60	Johnson-Cousins $BV(I_{\rm C}$ )

Notes. Observatory abbreviations and observers are: 1 - OAN-SPM (Observatorio Astronómico Nacional de San Pedro Mártir) - EP, KU; 2 - Baker - MDR, JRE, GAG; 3 - ORM (Observatorio del Roque de los Muchachos) - SS, JV, BA, CG, RØ, WDM, KY, MC, MSp, SP, VVH, WZ, RH, BV, DLa, EPA, TV, JDR, SD, MR, GD, EB, HVW, EV, CW, GR, YB, PD, JB, RD; 4 - OFXB (Observatoire François-Xavier-Bagnoud) - SS; 5 - Michelbach - ALe, PB, JP, LS; 6 - Vienna - GH, ES, ALe, PL, DLo, BS; 7 - Bia $\l$ ków - AP, AN, GK, MSt, ZK, GM; 8 - Athens - PN, ALi; 9 - EUO (Ege University Observatory) - KY, BK; 10 - TUG (Tübítak National Observatory) - KY, BK; 11 - Xinglong - JNF, CZ, XJJ; 12 - SOAO (Sobaeksan Optical Astronomy Observatory) - S-LK, DHK, Y-JL, C-UL, J-HK.

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