Table 1: Instruments and observations.
integral field spectroscopy long-slit spectroscopy imaging

Telescope Calar Alto 3.5 m SAO 6 m SAO 6 m CFHT 3.6 m

instrument PMAS MPFS LSS OSIS

Date of observation 28.10.2001 15.03.2002 14-15.01.2002 11.03.2000

Exposure time $4\times900$ s mosaic, - offsets: 4 $^{\prime \prime }$ $2\times900$ s 1800 s (N1-3) $2\times1200$ s (H $\alpha$ )

2700 s (N4-5) $2\times300$ s (R)

$2\times500$ s (B)

Seeing 1.0 $^{\prime \prime }$ 1.5-2.0 $^{\prime \prime }$ 1.5 $^{\prime \prime }$ /1.1 $^{\prime \prime }$ $\sim$ $0.7^{\prime\prime}$

Field of view 8 $^{\prime \prime }$ $\times$ 8 $^{\prime \prime }$ , 12 $^{\prime \prime }$ $\times$ 12 $^{\prime \prime }$ (mosaic) 16 $^{\prime \prime }$ $\times$ 16 $^{\prime \prime }$ 2 $^{\prime\prime}\times140^{\prime\prime}$ 3 $^{\prime }$ $\times$ 3 $^{\prime }$

Pixel scale 0.5 $^{\prime \prime }$ /pix 1.0 $^{\prime \prime }$ /pix 0.41 $^{\prime \prime }$ /pix 0.088 $^{\prime \prime }$ /pix

Image size in pixels 2048 $\times$ 4096 (binned 2 $\times$ 2) 1024 $\times$ 1024 1024 $\times$ 1024 2048 $\times$ 2048

Spectral coverage 4450-5140 Å 4210-6820 Å 4330-6750 Å -

Dispersion 0.76 Å/binned pix 2.7 Å/pix 2.4 Å/pix -

Spectral resolution 1.5 Å 7.0 Å 7.2 Å -

**Table 1:** Instruments and observations.
	integral field spectroscopy	long-slit spectroscopy	imaging
Telescope	Calar Alto 3.5 m	SAO 6 m	SAO 6 m	CFHT 3.6 m
instrument	PMAS	MPFS	LSS	OSIS
Date of observation	28.10.2001	15.03.2002	14-15.01.2002	11.03.2000
Exposure time	$4\times900$ s mosaic, - offsets: 4 $^{\prime \prime }$	$2\times900$ s	1800 s (N1-3)	$2\times1200$ s (H $\alpha$ )
			2700 s (N4-5)	$2\times300$ s (R)
				$2\times500$ s (B)
Seeing	1.0 $^{\prime \prime }$	1.5-2.0 $^{\prime \prime }$	1.5 $^{\prime \prime }$ /1.1 $^{\prime \prime }$	$\sim$ $0.7^{\prime\prime}$
Field of view	8 $^{\prime \prime }$ $\times$ 8 $^{\prime \prime }$ , 12 $^{\prime \prime }$ $\times$ 12 $^{\prime \prime }$ (mosaic)	16 $^{\prime \prime }$ $\times$ 16 $^{\prime \prime }$	2 $^{\prime\prime}\times140^{\prime\prime}$	3 $^{\prime }$ $\times$ 3 $^{\prime }$
Pixel scale	0.5 $^{\prime \prime }$ /pix	1.0 $^{\prime \prime }$ /pix	0.41 $^{\prime \prime }$ /pix	0.088 $^{\prime \prime }$ /pix
Image size in pixels	2048 $\times$ 4096 (binned 2 $\times$ 2)	1024 $\times$ 1024	1024 $\times$ 1024	2048 $\times$ 2048
Spectral coverage	4450-5140 Å	4210-6820 Å	4330-6750 Å	-
Dispersion	0.76 Å/binned pix	2.7 Å/pix	2.4 Å/pix	-
Spectral resolution	1.5 Å	7.0 Å	7.2 Å	-

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and data reduction
	3 Optical counterpart of the ULX HoII X-1
	4 Emission line properties
	5 Chandra and XMM observations of HoII X-1
	6 Discussion
	References