[ASA] SkyMapper DR2

[Christopher Onken]

Dear colleagues,

the SkyMapper Team is pleased to announce that Data Release 2 (DR2) from the SkyMapper Southern Survey is now available for use by Australian astronomers at http://skymapper.anu.edu.au.

DR2 covers nearly the entire Southern sky in the six SkyMapper filters (uvgriz), and totals more than 4.7 billion detections from over 120,000 images, including the first deeper images from the Main Survey. In the i and z filters, the vast majority of the hemisphere has at least the initial set of Main Survey visits. DR2 also incorporates significant improvements in photometric calibration. The individual detections have been merged into a mean photometry catalogue of over 500 million unique objects. These objects have been pre-matched against a variety of external catalogues (Gaia, Pan-STARRS1, and more).

Catalogue access (through Cone Search and TAP/ADQL) and image cutouts are available via the SkyMapper node of the All-Sky Virtual Observatory (ASVO) and with tools like TOPCAT and Aladin (see http://skymapper.anu.edu.au/how-to-access/). Australian astronomers initially have exclusive access to DR2, after which the data will become available to researchers worldwide. Please also note the authorship and publication policy for DR2 data, available at http://skymapper.anu.edu.au/policies.

More information on the survey and DR2 are available at the website<http://skymapper.anu.edu.au>. Future data releases will incorporate even deeper coadded images, 2D PSF fitting, and further refinement of the photometric calibration.

Access to the SkyMapper Southern Survey has been provided through a LIEF grant from the Australian Research Council. The SkyMapper ASVO node received grant funding from the Australian Government through the National Collaborative Research Infrastructure Strategy (NCRIS) program via Astronomy Australia Limited (AAL).

Feedback, questions, and bug reports may be directed to skymapper at anu.edu.au<mailto:skymapper at anu.edu.au>

- Christopher Onken, on behalf of the SkyMapper Team

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