Table information for 'ogle.ts_ssa'

General

Table Description: This table contains metadata about the OGLE the photometric time series in IVOA SSA format. The actual data is available through a datalink service.

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

Resource Description:

The Optical Gravitational Lensing Experiment (OGLE) is a long-term photometric survey operated by the University of Warsaw at Las Campanas Observatory. Most of the observations are carried out in the Cousins I filter, with auxiliary measurements in the V filter.

High-cadence, long-term observations of crowded fields have led to the systematic discovery and classification of variable stars. The OGLE Collection of Variable Stars (OCVS) contains over one million objects. OCVS light curves span three survey phases: OGLE-II (1996-2000), OGLE-III (2001-2009), and OGLE-IV (2010-present).

The VO-compliant re-publication of the OCVS light curve collection allows bulk download for objects with a specific variability class and parameters, which can be very handy for ML-based light curve analysis and related applications.

The original data of the republished collection can be found at: https://www.astrouw.edu.pl/ogle/ogle4/OCVS/.

While republishing, we almost preserve the original data structure. That is, there are tables with variable star parameters split by variability type (Cepheids, Eclipsing and Ellipsoidal Binaries, RR Lyrae stars, etc.) and by sky field: Galactic Bulge (BLG), Magellanic Clouds (LMC, SMC), Galactic Disc (GD). A few tables are related only to a variability class (e.g., Cataclysmic Variables - CV, BLAPs, Anomalous Cepheids in the Milky Way - ACEP/GAL) or a specific field (M54 variables, which comprise diverse classes).

All observed objects with their main parameters are aggregated in the object_all table, which facilitates generic queries across all classes. This table is served by Cone Search.

The ts_ssa table is the main table for light-curve queries. It is served by TAP and SSA services. The time series themselves, as well as previews of folded and unfolded light curves, can be accessed via DataLink from the ts_ssa and ObsCore tables. Direct links to previews of folded curves are placed in the preview column of both the ts_ssa and ObsCore tables.

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

Resource Reference URL: Resource info

Citing this table

@MISC{vo:ogle_ts_ssa,
  year=2025,
  title={{OGLE} Time series},
  author={Soszyński, I. and Udalski, A. and Szymański, M.K. and Szymański, G. and Poleski, R. and Pawlak, M. and Pietrukowicz, P. and Wrona, M. and Iwanek, P. and Mróz, M.},
  url={https://skvo.science.upjs.sk/tableinfo/ogle.ts_ssa},
  howpublished={{VO} resource provided by the Pavol Josef Šafárik University Archive}
}

Copyright, License, Acknowledgements

If you use or refer to the data obtained from this catalog in your scientific work, please cite the appropriate papers:

bibcode:	2015AcA....65....1U (OGLE-IV photometry)
bibcode:	2008AcA....58...69U (OGLE-III photometry)

Resource Documentation

The original OCVS data are provided as a set of tables with stellar parameters, split by variable-star class and sky field. Indeed, different variability classes have different sets of parameters. We preserve the division by variability class, but aggregate stars of a given class from all fields into unified tables with corresponding names, such as cepheids for Classical Cepheids or eclipsing for Eclipsing Binaries and so on. This allows more precise, variability-class–specific queries.

All observed objects, together with their basic parameters, are aggregated in the object_all table, which facilitates generic queries across all classes. This table is served via Cone Search.

The ts_ssa table is the main table for light-curve queries. It is served by TAP and SSA services. The time series themselves, as well as previews of folded and unfolded light curves, can be accessed via DataLink from the ts_ssa and ObsCore tables. Direct links to previews of folded curves are placed in the preview column of both the ts_ssa and ObsCore tables.

SELECT ssa_targname, accref, o.period FROM ogle.ts_ssa AS t JOIN ogle.rrlyr AS o
ON t.ssa_targname = o.object_id
WHERE o.period BETWEEN 0.5 AND 0.7 AND t.ssa_bandpass = 'I'

SELECT * from ogle.objects_all WHERE epoch > ivo_to_mjd('2027-01-01')

SELECT o.* FROM ogle.objects_all o JOIN ogle.ts_ssa t ON o.object_id = t.ssa_targname
AND t.ssa_bandpass='I' WHERE o.period > ssa_timeext

SELECT TOP 10 accref, preview, o.* FROM ogle.eclipsing o JOIN ogle.ts_ssa t ON o.object_id = t.ssa_targname
WHERE subtype='C' and ssa_length>100 ORDER BY o.period DESC

Columns

Sorted by DB column index. [Sort alphabetically]

Columns that are parts of indices are marked like this.

VOResource

VO nerds may sometimes need VOResource XML for this table.