Table information for 'basecom.epn_core'


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

Resource Description: Since 1973, the 18-cm lines of the OH radical have been systematically observed in a number of comets with the Nançay radio telescope. This allowed an evaluation of the cometary water production rates and their evolution with time, as well as a study of several physical processes: the excitation mechanisms of the OH radio lines, the expansion of the cometary atmospheres, their anisotropy in relation with non-gravitational forces, the Zeeman effect in relation with the cometary magnetic field. The Nançay observations of 53 cometary apparitions between 1982 and 2009 are now organized in this database.

For a list of all services and tables belonging to this table's resource, see Information on resource 'The Nançay Cometary Database'

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Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference various either in addition to or instead of the service reference.

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

  title={The Nançay Cometary Database},
  howpublished={{VO} resource provided by the {PADC} {TAP} Server on}


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
granule_gid Granule_gid Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric. N/A
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
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;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;instr.obsty
instrument_name Instrument_name Standard name of instrument N/A;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 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
access_md5 Access_md5 MD5 Hash for the file N/A meta.checksum;meta.file
time_scale Time_scale Always UTC in data services (may be relaxed in computational services such as ephemeris) - from enumerated list N/A time.scale
publisher Publisher A short string identifying the entity running the data service used. N/A meta.ref
bib_reference Bib_reference Bibcode preferred if available (does that include link?), doi, or other biblio id, URL N/A meta.bib
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
target_region Target_region Type of region of interest N/A;class
species Species Identifies a chemical species, case sensitive N/A;phys.atmol
alt_target_name Alt_target_name Provides alternative target name if more common (e.g. comets) N/A;src
file_name File_name Name of the data file only, case sensitive. N/A;meta.file
external_link External_link Link to a web page providing more details on the granule N/A meta.ref.url
tperihelion tperihelion Date of perihelion, UTC N/A time.epoch
dsun0 dsun0 Sun Distance at Perihelion au pos.distance;pos.heliocentric
comet_type comet_type Type of comet N/A meta.code.class
obsqual obsqual Observation quality: marginal/clear N/A meta.code.qual
status status N/A N/A meta.code.status
freq freq Frequency Hz em.freq
polar polar Polarisation N/A phys.polarization.circular
sun_distance_min Sun_distance_min Min target heliocentric distance in au au pos.distance;stat.min
sun_distance_max Sun_distance_max Max target heliocentric distance in au au pos.distance;stat.max
earth_distance_min Earth_distance_min Min target-Earth distance in au au pos.distance;stat.min
earth_distance_max Earth_distance_max Max target-Earth distance in au au pos.distance;stat.max
rdot rdot Heliocentric radial velocity km/s phys.veloc.orbital;pos.heliocentric
inv1 inv1 OH maser inversion 1 N/A arith
inv2 inv2 OH maser inversion 2 N/A arith
tbg tbg Background brightness temperature K instr.skyTemp
line_area spect_area Line area phys.area;spect.line
line_area_error line_area_error Line area error phys.area;spect.line;stat.error
line_strength line_strength Line maximum intensity mJy spect.line.strength
line_strength_error line_strength_error Line maximum intensity error mJy spect.line.strength;stat.error
v0 v0 Line central velocity km/s spect.dopplerVeloc
v0_error v0_error Line central velocity error km/s spect.dopplerVeloc;stat.error
dv0 dv0 Line FWHM km/s spect.line.width
dv0_error dv0_error Line FWHM error km/s spect.line.width;stat.error
q1oh q1oh OH production rate 1 (unit=10**28/s) N/A arith.rate;phys.mass.loss
q1_error q1_error OH production rate 1 error (unit=10**28/s) N/A arith.rate;phys.mass.loss;stat.error
q2oh q2oh OH production rate 2 (unit=10**28/s) N/A arith.rate;phys.mass.loss
q2_error q2_error OH production rate 2 error (unit=10**28/s) N/A arith.rate;phys.mass.loss;stat.error
ra ra N/A deg pos.eq.ra
offra offra RA Offset from target deg pos.eq.ra;arith.diff
dec dec N/A deg pos.eq.dec
offdec offdec Dec Offset from target deg pos.eq.dec;arith.diff
ds_id Dataset ID Housekeeping info for datalink services N/A
datalink_url Datalink Positional ephemeris via datalink N/A meta.ref.url;meta.datalink

Columns that are parts of indices are marked like this.


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Copyright and such: Crovisier et al 2002, A&A 393, 1053–1064.