Table information for 'ivoa.emptyobscore'

General

Table Description: An empty table having all columns of the obscore table. Useful internally, and sometimes for tricky queries.

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'

Citing this table

Reference the Table

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:ivoa_emptyobscore,
  year=2011,
  title={Untitled Resource},
  author={Sebastian Walter},
  url={http://dachs.planet.fu-berlin.de/tableinfo/ivoa.emptyobscore},
  howpublished={{VO} resource provided by the Planetary web services @ {FUB}}
}

Fields

Sorted alphabetically. [Sort by DB column index]

NameTable Head DescriptionUnitUCD
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.outline;obs.field
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

VOResource

VO nerds may sometimes need VOResource XML for this table.

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)