Table 2: Observational details of the data set described in this paper.
Observatory Telescope Equipment Field of view Pixel scale Exp. interval (s)

Michigan State University⁽¹⁾ 0.6-m Apogee Ap47p CCD 10 $\times$ 10' 1.1''/pix 60-90

Athens University Observatory⁽¹⁾ 0.4-m SBIG ST8 CCD 15 $\times$ 22.5' 2.6''/pix 30-40

APT Arizona⁽²⁾ 0.7-m EMI-9124QB PMT - - 40

Ankara University Observatory⁽²⁾ 0.3-m SSP-5A PMT - - 40

Beersel Hills Observatory⁽³⁾ 0.13-m ST10XME CCD 43.8 $\times$ 29.4' 1.2''/pix 50-130

Beersel Hills Observatory⁽³⁾ 0.25-m ST10XME CCD 33.9' $\times$ 22.9' 0.9''/pix 50-130

Vienna Observatory⁽¹⁾ 0.8-m Apogee Ap9e CCD 10' $\times$ 14' 0.3''/pix 60-90

⁽¹⁾ Comparison star: BD +42 3334, check star: BD +42 3339.
⁽²⁾ Comparison star: HD182755 = BD+42 3331, check star: BD +42 3334.
⁽³⁾ Comparison star: GSC 3142 68 = SAO 48408, check star: GSC.

**Table 2:** Observational details of the data set described in this paper.
Observatory	Telescope	Equipment	Field of view	Pixel scale	Exp. interval (s)
Michigan State University⁽¹⁾	0.6-m	Apogee Ap47p CCD	10 $\times$ 10'	1.1''/pix	60-90
Athens University Observatory⁽¹⁾	0.4-m	SBIG ST8 CCD	15 $\times$ 22.5'	2.6''/pix	30-40
APT Arizona⁽²⁾	0.7-m	EMI-9124QB PMT	-	-	40
Ankara University Observatory⁽²⁾	0.3-m	SSP-5A PMT	-	-	40
Beersel Hills Observatory⁽³⁾	0.13-m	ST10XME CCD	43.8 $\times$ 29.4'	1.2''/pix	50-130
Beersel Hills Observatory⁽³⁾	0.25-m	ST10XME CCD	33.9' $\times$ 22.9'	0.9''/pix	50-130
Vienna Observatory⁽¹⁾	0.8-m	Apogee Ap9e CCD	10' $\times$ 14'	0.3''/pix	60-90

Source LaTeX | All tables | In the text