Table information for 'gaia_dem.epn_core'

General

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

Resource Description: GAIA-DEM
GAIA-DEM is a database of Differential Emission Measure (DEM) maps. The DEM is a measure of the thermal structure of the coronal plasma, representing the quantity of light emitting plasma along the line of sight, at different temperatures. In GAIA-DEM, the DEM is modelled by a specific function of temperature, namely a Gaussian of the logarithm of electron temperature. GAIA-DEM maps are then maps of the DEM maximum temperature, of the DEM integral (total Emission Measure), and DEM width (in temperature). These maps are obtained by inversion from the SDO/AIA EUV images in 6 coronal channels (9.4, 13.1, 17.1, 19.3, 21.1, and 33.5 nm). In addition, maps of the χ² for the inversion are provided.
GAIA-DEM is available from a specific interface at http://medoc-dem.ias.u-psud.fr, as well as part of the generic MEDOC interface which is currently located at https://idoc-medoc.ias.u-psud.fr. These interfaces are based on the CNES SiTools2 framework. GAIA-DEM is also available from IDL and Python scripts, using a specialization of the generic SiTools2 IDL and Python clients developed by MEDOC.

For a list of all services and tables belonging to this table's resource, see Information on resource 'SDO GAIA-DEM'

Resource Reference URL: http://medoc-dem.ias.u-psud.fr

Citing this table

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

@MISC{vo:gaia_dem_epn_core,
  year=2018,
  title={{SDO} {GAIA}-{DEM}},
  author={{IDOC}: Integrated Data and Operating Center},
  url={http://idoc-dachs.ias.u-psud.fr/tableinfo/gaia_dem.epn_core},
  howpublished={{VO} resource provided by the {IDOC}: Integrated Data and Operating Center}
}

Columns

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
granule_uid Granule_uid Internal table row index Unique ID in data service, also in v2. Can be alphanumeric. N/A meta.id
granule_gid Granule_gid Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric. N/A meta.id
obs_id Obs_id Associates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation. N/A meta.id
dataproduct_type Dataproduct_type The high-level organization of the data product, from enumerated list (e.g., 'im' for image, sp for spectrum) [Note et_prod] N/A meta.code.class
target_name Target_name Standard IAU name of target (from a list related to target class), case sensitive N/A meta.id;src
target_class Target_class Type of target, from enumerated list N/A meta.code.class;src
time_min Time_min Acquisition start time (in JD) d time.start
time_max Time_max Acquisition stop time (in JD) d time.end
time_sampling_step_min Time_sampling_step_min Sampling time for measurements of dynamical phenomena, lower limit. s time.interval;stat.min
time_sampling_step_max Time_sampling_step_max Sampling time for measurements of dynamical phenomena, upper limit s time.interval;stat.max
time_exp_min Time_exp_min Integration time of the measurement, lower limit. s time.duration;obs.exposure;stat.min
time_exp_max Time_exp_max Integration time of the measurement, upper limit s time.duration;obs.exposure;stat.max
spectral_range_min Spectral_range_min Spectral range (frequency), lower limit. Hz em.freq;stat.min
spectral_range_max Spectral_range_max Spectral range (frequency), upper limit Hz em.freq;stat.max
spectral_sampling_step_min Spectral_sampling_step_min spectral sampling step, lower limit. Hz em.freq.step;stat.min
spectral_sampling_step_max Spectral_sampling_step_max spectral sampling step, upper limit Hz em.freq.step;stat.max
spectral_resolution_min Spectral_resolution_min Sectral resolution, lower limit. Hz spect.resolution;stat.min
spectral_resolution_max Spectral_resolution_max Sectral resolution, upper limit Hz spect.resolution;stat.max
c1min C1min Right Ascension (ICRS), lower limit. deg pos.eq.ra;stat.min
c1max C1max Right Ascension (ICRS), upper limit deg pos.eq.ra;stat.max
c2min C2min Declination (ICRS), lower limit. deg pos.eq.dec;stat.min
c2max C2max Declination (ICRS), upper limit deg pos.eq.dec;stat.max
c3min C3min Distance from coordiate origin, lower limit. m phys.distance;stat.min
c3max C3max Distance from coordiate origin, upper limit m phys.distance;stat.max
s_region S_region ObsCore-like footprint, valid for celestial, spherical, or body-fixed frames. N/A phys.outline;obs.field
c1_resol_min C1_resol_min Resolution in the first coordinate, lower limit. deg pos.resolution;stat.min
c1_resol_max C1_resol_max Resolution in the first coordinate, upper limit deg pos.resolution;stat.max
c2_resol_min C2_resol_min Resolution in the second coordinate, lower limit. deg pos.resolution;stat.min
c2_resol_max C2_resol_max Resolution in the second coordinate, upper limit deg pos.resolution;stat.max
c3_resol_min C3_resol_min Resolution in the third coordinate, lower limit. m pos.resolution;stat.min
c3_resol_max C3_resol_max Resolution in the third coordinate, upper limit m pos.resolution;stat.max
spatial_frame_type Spatial_frame_type Flavor of coordinate system, defines the nature of coordinates. From enumerated list N/A meta.code.class;pos.frame
incidence_min Incidence_min Incidence angle (solar zenithal angle) during data acquisition, lower limit. deg pos.posAng;stat.min
incidence_max Incidence_max Incidence angle (solar zenithal angle) during data acquisition, upper limit deg pos.posAng;stat.max
emergence_min Emergence_min Emergence angle during data acquisition, lower limit. deg pos.posAng;stat.min
emergence_max Emergence_max Emergence angle during data acquisition, upper limit deg pos.posAng;stat.max
phase_min Phase_min Phase angle during data acquisition, lower limit. deg pos.phaseAng;stat.min
phase_max Phase_max Phase angle during data acquisition, upper limit deg pos.phaseAng;stat.max
instrument_host_name Instrument_host_name Standard name of the observatory or spacecraft. N/A meta.id;instr.obsty
instrument_name Instrument_name Standard name of instrument N/A meta.id;instr
measurement_type Measurement_type UCD(s) defining the data, with multiple entries separated by hash (#) characters. N/A meta.ucd
processing_level Processing_level CODMAC calibration level; see the et_cal note http://dc.g-vo.org/tableinfo/titan.epn_core#note-et_cal for what values are defined here. [Note et_cal] N/A meta.code;obs.calib
creation_date Creation_date Date of first entry of this granule N/A time.creation
modification_date Modification_date Date of last modification (used to handle mirroring) N/A time.update
release_date Release_date Start of public access period N/A time.release
service_title Service_title Title of resource (an acronym really, will be used to handle multiservice results) N/A meta.title
access_url Access_url URL of the data file, case sensitive. Can point to a script. N/A meta.ref.url;meta.file
access_format Access_format File format type (RFC 6838 Media Type a.k.a MIME type) N/A meta.code.mime
access_estsize Access_estsize Estimated file size in kbyte. kbyte phys.size;meta.file
thumbnail_url Thumbnail_url URL of a thumbnail image with predefined size (png ~200 pix, for use in a client only). N/A meta.ref.url;meta.file
file_name File_name Name of the data file only, case sensitive. N/A meta.id;meta.file
publisher Publisher A short string identifying the entity running the data service used. N/A meta.ref
spatial_coordinate_description Spatial_coordinate_description ID of specific coordinate system and version / properties N/A meta.code.class;pos.frame
spatial_origin Defines the frame origin meta.ref;pos.frame N/A meta.code.class;pos.frame
target_distance_min Target_distance_min Min observer-target distance km pos.distance;stat.min
target_distance_max Target_distance_max Max observer-target distance km pos.distance;stat.max
target_time_min Target_time_min Min observing time in target frame N/A time.start;src
target_time_max Target_time_max Max observing time in target frame N/A time.end;src
datalink_url Datalink Datalinks and services for this objet N/A meta.ref.url;meta.datalink

Columns that are parts of indices are marked like this.

Other

The following services may use the data contained in this table:

VOResource

VO nerds may sometimes need VOResource XML for this table.

Notes

Copyright and such: This research has been made at MEDOC