visit1_quicklook

Information from Summit Rapid Analysis about each visit in visit system 1 (visit per exposure); describes processed visit images (or calibrated exposures)

Columns

name	datatype	description	unit	nullable	ivoa:ucd	tap:std	votable:utype
visit_id foreign key	long	Unique identifier.		false		0
day_obs primary key foreign key	int	Day of observation.		false	meta.id.part	0
seq_num primary key foreign key	int	Sequence number.		false	meta.id.part	0
n_inputs	int	Number of CCDs used to compute the visit aggregates.		true		0
pixel_scale	float	Measured detector pixel scale.	arcsec/pixel	true		0
astrom_offset_mean	float	Mean offset of astrometric calibration matches.	arcsec	true		0
astrom_offset_std	float	Standard deviation of offsets of astrometric calibration matches.	arcsec	true		0
astrom_ra	double	Central Spatial Position in ICRS; Right ascension of the CCD center. In contrast with #exposure.s_ra, which is the targeted sky position, this is the position fitted after plate solving the image.	deg	true	pos.eq.ra	1	Char.SpatialAxis.Coverage.Location.Coord.Position2D.Value2.C1
astrom_dec	double	Central Spatial Position in ICRS; Declination of the CCD center. In contrast with #exposure.s_dec, which is the targeted sky position, this is the position fitted after plate solving the image.	deg	true	pos.eq.dec	1	Char.SpatialAxis.Coverage.Location.Coord.Position2D.Value2.C2
astrom_sky_rotation	double	Fitted sky rotation angle based on plate solving. This quantity can be compared to #exposure.sky_rotation, the targeted sky rotation angle.	deg	true	pos.posAng	0
eff_time	float	Effective exposure time calculated from PSF sigma, sky background, and zero point.	s	true		0
eff_time_psf_sigma_scale	float	Scale factor for effective exposure time based on PSF sigma.		true		0
eff_time_sky_bg_scale	float	Scale factor for effective exposure time based on sky background.		true		0
eff_time_zero_point_scale	float	Scale factor for effective exposure time based on zero point.		true		0
stats_mag_lim	float	Magnitude limit at fixed SNR (default SNR=5) calculated from exposure summary stats.	mag	true		0
mean_var	float	Mean of the variance plane.		true		0
n_psf_star	int	Number of stars used for PSF model.		true		0
psf_area	float	PSF area.		true		0
psf_ixx	float	PSF Ixx moment.		true		0
psf_ixy	float	PSF Ixy moment.		true		0
psf_iyy	float	PSF Iyy moment		true		0
psf_sigma	float	PSF sigma.		true		0
psf_star_delta_e1_median	float	Median E1 residual (starE1 - psfE1) for PSF stars.		true		0
psf_star_delta_e1_scatter	float	Scatter (via MAD) of E1 residual (starE1 - psfE1) for PSF stars.		true		0
psf_star_delta_e2_median	float	Median E2 residual (starE2 - psfE2) for PSF stars.		true		0
psf_star_delta_e2_scatter	float	Scatter (via MAD) of E2 residual (starE2 - psfE2) for PSF stars.		true		0
psf_star_delta_size_median	float	Median size residual (starSize - psfSize) for PSF stars.		true		0
psf_star_delta_size_scatter	float	Scatter (via MAD) of size residual (starSize - psfSize) for stars.		true		0
psf_star_scaled_delta_size_scatter	float	Scatter (via MAD) of size residual scaled by median size squared.		true		0
psf_trace_radius_delta	float	Delta (max - min) of model PSF trace radius values evaluated on a grid of unmasked pixels.		true		0
psf_ap_flux_delta	float	Delta (max - min) of model psf aperture flux (with aperture radius of max(2, 3*psfSigma)) values evaluated on a grid of unmasked pixels.		true		0
psf_ap_corr_sigma_scaled_delta	float	Delta (max - min) of psf flux aperture correction factors scaled (divided) by the psfSigma evaluated on a grid of unmasked pixels.		true		0
max_dist_to_nearest_psf	float	Maximum distance of an unmasked pixel to its nearest model PSF star.		true		0
sky_bg	float	Average sky background.		true		0
sky_noise	float	RMS noise of the sky background.		true		0
seeing_zenith_500nm	double	Measured PSF sigma, corrected to 500nm and an airmass of 1.		true		0
zero_point	float	Photometric zero point.		true		0
low_snr_source_count	int	Count of low signal-to-noise-ratio sources.	count	true		0
high_snr_source_count	int	Count of high signal-to-noise-ratio sources.	count	true		0

Constraints

Constraint	Type	Definition	Description
fk_visit1_quicklook_obs_id	ForeignKey	Columns: visit_id References: exposure.exposure_id	Quicklook visit_id must be an Exposure exposure_id.
fk_visit1_quicklook_ds	ForeignKey	Columns: day_obs, seq_num References: exposure.day_obs, exposure.seq_num	Quicklook day_obs must be an Exposure day_obs.
fk_visit1_quicklook_visit_id_ds	ForeignKey	Columns: visit_id, day_obs, seq_num References: exposure.exposure_id, exposure.day_obs, exposure.seq_num	Quicklook visit_id/day_obs/seq_num must match an Exposure.