Table information for 'bgds2.lc_allbands'

General

Table Description: BGDS DR2 lightcurves as arrays. This is available only for objects with sufficient coverage. To obtain positions and mean photometry, join with the corresponding phot_all or, better, with the appropriate phot_(band) table. Note that mags is mixed-band; obtain the filter used from the filter column.

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

Resource Description:

From the Bochum Galactic Disk Survey, time series have been obtained in the r and i bands on an (up to) nightly basis. Depending on the field, the time series contain up to more than 300 nights over 9 years. Each measurement in r and i represents the averaged flux over 10 minutes of observation (from 9 averaged 10s images). Additionally, intermittent measurements in Johnson UVB, Sloan z and the narrowbands OIII, NB, Halpha and SII have been recorded as well.

The Bochum Galactic Disk Survey is a project to monitor the stellar content of the Galactic disk in a 6 degree wide stripe centered on the Galactic plane. The data has been recorded from September 2010 to September 2019 in Sloan r and i simultaneously with the Robotic Bochum Twin Telescope (RoBoTT) at the Universitaetssternwarte Bochum near Cerro Armazones in the Chilean Atacama desert. It contains measurements of about 2x10^7 stars over nine years.

The source images are available from ivo://org.gavo.dc/bgds/q/sia.

For a list of all services and tables belonging to this table's resource, see Information on resource 'BGDS DR2 time series'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2015AN....336..590H (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

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

@MISC{vo:bgds2_lc_allband,
  year=2024,
  title={{BGDS} DR2 time series},
  author={Hackstein, M. and Haas, M. and Fein, C. and Chini, R.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/bgds2.lc_allbands},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

If you use GDS data, please cite 2015AN....336..590H.

Resource Documentation

The time series from BGDS DR2 by default come as IVOA Spectral Data Model compliant VOTables. If you what plain text instead, add &format=txt to the dlget URIs. The columns you get back then are epoch in MJD, magnitude and magnitude error in mag, and a link to a cutout showing where the measurement came from.

Columns

Sorted alphabetically. [Sort by DB column index]

NameTable Head DescriptionUnitUCD
mag_errs Err(mag)[] An array containing per-epoch errors for the mags array. mag stat.error;phot.mag
mags mag[] An array containing the magnitude for the times in mjd mag phot.mag
mjds T[] An array containing the time values of the time series d time.epoch
obs_id Obs_id Main identifier of this observation (a single object may have multiple observations in different bands and fields) N/A meta.id;meta.main
ssa_bandpass Bandpass Bandpass (i.e., rough spectral location) of this dataset; this should be the most appropriate term from the vocabulary http://www.ivoa.net/rdf/messenger. N/A instr.bandpass
ssa_length Length Number of points in the spectrum N/A N/A
ssa_specend Band end Upper value of spectral coordinate m em.wl;stat.max
ssa_specmid Mid. Band Midpoint of region covered in this dataset m instr.bandpass
ssa_specstart Band start Lower value of spectral coordinate m em.wl;stat.min
time_avg <Obs> Mean epoch of observation d time.epoch;stat.mean
time_max Last Obs Last timestamp in time series (MJD Topocentric UTC) d time.epoch;stat.max
time_min 1st Obs First timestamp in time series (MJD Topocentric UTC) d time.epoch;stat.min

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.