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Zwicky Transient Facility (ZTF)

astronomy object detection parquet survey

Description

The Zwicky Transient Facility (ZTF) is a time-domain astronomy survey that uses the Palomar 48 inch Schmidt telescope and a custom-built wide-field camera to image the night sky in three photometric filters (g, r, and i). It is a fully-automated survey aimed at a systematic exploration of optical transient phenomena. It completes a scan of the observable northern sky approximately every three nights.

Update Frequency

ZTF datasets may be updated approximately twice per year. The data may also be presented in new ways as the products become available.

License

https://irsa.ipac.caltech.edu/data_use_terms.html

Documentation

https://irsa.ipac.caltech.edu/Missions/ztf.html

Managed By

See all datasets managed by IRSA.

Contact

https://irsa.ipac.caltech.edu/docs/help_desk.html

How to Cite

Zwicky Transient Facility (ZTF) was accessed on DATE from https://registry.opendata.aws/ztf. If you use the Objects Table, please cite the Digital Object Identifier (DOI): 10.26131/IRSA597. If you use the Lightcurves, please cite the Digital Object Identifier (DOI): 10.26131/IRSA598. In addition, please follow the ZTF acknowledgement guidelines and the IRSA acknowledgement guidelines.

Usage Examples

Tutorials

Resources on AWS

  • Description
    Objects Table is a catalog of PSF-fit photometry detections extracted from ZTF reference images. The reference images were generated by stacking single exposures acquired from all science programs in the survey, resulting in photometry up to 2.5 magnitudes deeper than single-exposure detections. Objects Table contains both point-like and extended objects. The survey covers ~25,000 square degrees of the northern hemisphere. This version of the catalog is in Apache Parquet format and partitioned following the Hierarchical Adaptive Tiling Scheme (HATS).
    Resource type
    S3 Bucket
    Amazon Resource Name (ARN)
    arn:aws:s3:::ipac-irsa-ztf/contributed/dr23/objects/hats
    AWS Region
    us-east-1
    AWS CLI Access (No AWS account required)
    aws s3 ls --no-sign-request s3://ipac-irsa-ztf/contributed/dr23/objects/hats/
  • Description
    Lightcurves is a catalog of PSF-fit photometry detections extracted from single-exposure images at the locations of Objects Table detections. An object ID identifies related data in both catalogs. Photometry is in the native ZTF photometric system and the epoch-dependent zeropoints have already been applied. Note that Lightcurves detections may be missing, for example, in cases where the Objects Table detection is fainter or approximately equal to the single-exposure sensitivity limits. This version of the catalog is in Apache Parquet format and partitioned following the Hierarchical Adaptive Tiling Scheme (HATS).
    Resource type
    S3 Bucket
    Amazon Resource Name (ARN)
    arn:aws:s3:::ipac-irsa-ztf/contributed/dr23/lc/hats
    AWS Region
    us-east-1
    AWS CLI Access (No AWS account required)
    aws s3 ls --no-sign-request s3://ipac-irsa-ztf/contributed/dr23/lc/hats/

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