Table information for 'ivoa.ObsCore'

General

Table Description: The IVOA-defined obscore table, containing generic metadata for datasets within this datacenter.

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: Definition and support code for the ObsCore data model and table.

For a list of all services and tables belonging to this table's resource, see Information on resource '__system__/obscore'

Fields

Sorted alphabetically. [Sort by DB column index]

Name	Table Head	Description	Unit	UCD
access_estsize	Access_estsize	Estimated size of data product	kbyte	phys.size;meta.file
access_format	Access_format	MIME type of the resource at access_url	N/A	meta.code.mime
access_url	Access_url	The URL at which to obtain the data set.	N/A	meta.ref.url
calib_level	Calib_level	Amount of data processing that has been applied to the data [Note calib]	N/A	meta.code;obs.calib
dataproduct_subtype	Dataproduct_subtype	Data product specific type	N/A	meta.id
dataproduct_type	Dataproduct_type	High level scientific classification of the data product, taken from an enumeration	N/A	meta.id
em_max	Em_max	Maximal wavelength represented within the data set	m	em.wl;stat.max
em_min	Em_min	Minimal wavelength represented within the data set	m	em.wl;stat.min
em_res_power	Em_res_power	Spectral resolving power delta lambda/lamda	N/A	spect.resolution
em_ucd	Em_ucd	Nature of the product's spectral axis	N/A	meta.ucd
em_xel	Em_xel	Number of elements (typically pixels) along the spectral axis.	N/A	meta.number
facility_name	Facility_name	Name of the facility at which data was taken	N/A	meta.id;instr.tel
instrument_name	Instrument_name	Name of the instrument that produced the data	N/A	meta.id;instr
o_ucd	O_ucd	UCD for the product's observable	N/A	meta.ucd
obs_collection	Obs_collection	Name of a data collection (e.g., project name) this data belongs to	N/A	meta.id
obs_creator_did	Obs_creator_did	Dataset identifier assigned by the creator.	N/A	meta.id
obs_id	Obs_id	Unique identifier for an observation	N/A	meta.id
obs_publisher_did	Obs_publisher_did	Dataset identifier assigned by the publisher.	N/A	meta.ref.url;meta.curation
obs_title	Obs_title	Free-from title of the data set	N/A	meta.title;obs
pol_states	Pol_states	List of polarization states in the data set	N/A	meta.code;phys.polarization
pol_xel	Pol_xel	Number of elements (typically pixels) along the polarization axis.	N/A	meta.number
s_dec	S_dec	Dec of (center of) observation, ICRS	deg	pos.eq.dec
s_fov	S_fov	Approximate spatial extent for the region covered by the observation	deg	phys.angSize;instr.fov
s_pixel_scale	S_pixel_scale	Sampling period in world coordinate units along the spatial axis	arcsec	phys.angSize;instr.pixel
s_ra	S_ra	RA of (center of) observation, ICRS	deg	pos.eq.ra
s_region	S_region	Region covered by the observation, as a polygon	N/A	phys.angArea;obs
s_resolution	S_resolution	Best spatial resolution within the data set	arcsec	pos.angResolution
s_xel1	S_xel1	Number of elements (typically pixels) along the first spatial axis.	N/A	meta.number
s_xel2	S_xel2	Number of elements (typically pixels) along the second spatial axis.	N/A	meta.number
t_exptime	T_exptime	Total exporure time	s	time.duration;obs.exposure
t_max	T_max	Upper bound of times represented in the data set, as MJD	d	time.end;obs.exposure
t_min	T_min	Lower bound of times represented in the data set, as MJD	d	time.start;obs.exposure
t_resolution	T_resolution	Minimal significant time interval along the time axis	s	time.resolution
t_xel	T_xel	Number of elements (typically pixels) along the time axis.	N/A	meta.number
target_class	Target_class	Class of the target object (star, QSO, ...)	N/A	src.class
target_name	Target_name	Object a targeted observation targeted	N/A	meta.id;src

Columns that are parts of indices are marked like this.

Other

Notes

Note calib

The calib_level flag takes the following values:

0	Raw Instrumental data requiring instrument-specific tools
1	Instrumental data processable with standard tools
2	Calibrated, science-ready data without instrument signature
3	Enhanced data products (e.g., mosaics)