Archives of Photographic PLates for Astronomical USE

Exposure time and observation time (applause_dr1.exposure)

The table has 55691 rows, 39 columns.

Description

Exposure time and observation time for plates. Observing time is given (if possible and available) in various formats. Unique Identifier exposure_id

Attribution

If you have made substantial use of the data provided by APPLAUSE DR1, kindly include this acknowledgement

Funding for APPLAUSE has been provided by DFG (German Research Foundation, Grant), Leibniz Institute for Astrophysics Potsdam (AIP), Dr. Remeis Sternwarte Bamberg (University Nuernberg/Erlangen) and the Hamburger Sternwarte (University of Hamburg).

Columns

Name Type UCD Unit Description
exposure_id int meta.id
meta.main

Exposure identification number

plate_id int meta.id

Plate identification number

archive_id int meta.id

Archive identification number

exposure_num short meta.record

Exposure number within the plate

object_name char meta.id

Name of the observed object or field

object_type char meta.code

Object type, as listed in the WFPDB

ra_orig char pos.eq.ra

Original recorded right ascension of the telescope pointing (plate center)

dec_orig char pos.eq.dec

Original recorded declination of the telescope pointing (plate center)

flag_coord char meta.code.qual

Quality flag of the recorded coordinates (right ascension and declination)

raj2000 double pos.eq.ra deg

Right ascension of the telescope pointing in decimal degrees (equinox J2000)

dej2000 double pos.eq.dec deg

Declination of the telescope pointing in decimal degrees (equinox J2000)

raj2000_hms char pos.eq.ra

Right ascension of the telescope pointing (equinox J2000, sexagesimal format "h:m:s")

dej2000_dms char pos.eq.dec

Declination of the telescope pointing (equinox J2000, sexagesimal format "d:m:s")

flag_wcs short meta.code

1 if coordinates are taken from WCS solution, 0 otherwise

date_orig_start char time.start
obs.exposure

Original recorded date of the start of observation (evening date)

date_orig_end char time.end
obs.exposure

Original recorded date of the end of observation (evening date)

time_orig_start char time.start
obs.exposure

Original recorded time of the start of the observation (format "TZ hh:mm:ss", where TZ is time zone). Time zone can be "ST" (sidereal time), "UT" (universal time), or any time zone. Multiple time notations are separated with commas.

time_orig_end char time.end
obs.exposure

Original recorded time of the end of the observation

flag_time char meta.code.qual

Quality flag of the recorded observation time: "error","missing", "uncertain"

ut_start char time.start
obs.exposure
Time[yyyy-mm-dd hh:mm:ss]

UT date and time of the start of exposure

ut_mid char time.epoch
obs.exposure
Time[yyyy-mm-dd hh:mm:ss]

UT date and time of the mid-point of exposure

ut_weighted char time.epoch
obs.exposure
Time[yyyy-mm-dd hh:mm:ss]

UT date and time of the weighted mid-point of exposure

ut_end char time.end
obs.exposure
Time[yyyy-mm-dd hh:mm:ss]

UT date and time of the end of exposure

year_start double time.start
obs.exposure

Decimal year of the start of exposure

year_mid double time.epoch
obs.exposure

Decimal year of the mid-point of exposure

year_weighted double time.epoch
obs.exposure

Decimal year of the weighted mid-point of exposure

year_end double time.end
obs.exposure

Decimal year of the end of exposure

jd_start double time.start
obs.exposure

Julian date at the start of exposure

jd_mid double time.epoch
obs.exposure

Julian date at the mid-point of exposure

jd_weighted double time.epoch
obs.exposure

Julian date at the weighted mid-point of exposure

jd_end double time.end
obs.exposure

Julian date at the end of exposure

hjd_mid double time.epoch
obs.exposure

Heliocentric Julian date at the mid-point of exposure

hjd_weighted double time.epoch
obs.exposure

Heliocentric Julian date at the weighted mid-point of exposure

exptime float time.interval
obs.exposure
s

Exposure time

num_sub short meta.number

Number of sub-exposures

method short meta.code

Observation method. A list of possible values is given in the WFPDB.

focus float stat.value

Focus value (from logbook)

timestamp_insert char time.creation Time[yyyy-mm-dd hh:mm:ss]

Timestamp of insert

timestamp_update char time.creation Time[yyyy-mm-dd hh:mm:ss]

Timestamp of last update