VISION − Vienna survey in Orion - I. VISTA Orion A Survey

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Table 3

Accessible data columns for our VISION survey.

Column name	Description	Unit

VISION_ID	internal numbering	#
RAJ2000	Right ascension (J2000)	hh:mm:ss
DEJ2000	Declination (J2000)	dd:mm:ss
(J/H/K_S)	corrected magnitude	mag
(J/H/K_S)_err	magnitude error	mag
Class_cog^a	kNN-morphology	{0, 1}
Class_sex^b	SExtractor-morphology	[0, 1]
(J/H/K_S)_mjd	effective MJD	d
(J/H/K_S)_exptime	eff. exposure time	s
(J/H/K_S)_fwhm	source FWHM	arcsec
(J/H/K_S)_seeing	local seeing	arcsec
(J/H/K_S)_coverage	frame coverage	# exposures
(J/H/K_S)_aper	aperture radius	arcsec
(J/H/K_S)_2mass_id	2MASS identifier
(J/H/K_S)_origin	original catalog

Notes. Apart from astrometric and photometric measurements, we also include several quality control parameters and two morphological classification schemes.

^(a)

Based on curve-of-growth (cog) characteristics and a subsequent kNN analysis with SDSS classifications in the training sample.

^(b)

Based on neural networks and delivered with SExtractor; the published value is the one across all three bands for which the best seeing conditions were measured.

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