Data Access (PDR2)

We have dedicated tools for you to retrieve the HSC data.  Click on an image to go directly to the tool’s page.  Follow ReadMe for detailed description of each tool.

Notes on User Registration

You need to register for a user account if you wish to search/request/retrieve the data.  The use of the HSC data archive is restricted to non-commercial, scientific/educational purposes.  The registration information will be used only for the operation, maintenance and development of the HSC data archive system. We occasionally send notices about system maintenance and new releases to all the registered users.

Online Registration

CAS Search


Direct access to the directory tree

S16A data sets are based on data of internal data release DR1/S16A, which has been reduced by hscPipe 4 as same version of pipeline as PDR1, though the public data release 2 (PDR2) paper mentions about this data set. Wide layer data of S16A of public release come from DR1/S16A_Wide2 set, while DR1/S16A of internal data release has 2 versions; i.e. DR1/S16A_Wide and DR1/S16A_Wide2.

Client Tools

We offer a few command-line tools to retrieve data from our server as well as some useful off-line tools.

This tool allows you to send a query and retrieve data from your terminal.  This will be useful for sequential data retrieval.

We currently do not offer an environment in which users can upload their catalogs and match with the PDR2 database tables, but this tool allows you to do essentially the same job.

If you want postage-stamps of your objects in color, you can upload an object list with this tool.

A patch is a 4k x 4k image.  It is relatively large, but one may wish to generate a larger image.  This tool stitches adjacent patches in the same tract together.

Similar to Image Stitcher #1, but this one allows you to stitch patches in different tracts together.  The HSC (or LSST) pipeline has to be installed to use this tool.  The overlapping regions between the adjacent tracts are not exactly the same; tract A may have slightly different DNs and astrometry from tract B in the overlapping region.  This tool simply adopts the pixels from tract B in the resultant image.  This tool can also be used for CCD images to visualize a full focal plane image from a visit.

Coadd images have a mask layer, which carries useful information about object footprint, various pixel masks, etc.  This tool overlays a specific mask bit on a coadd image using ds9.

Ancillary Data Products

Some of the ancillary data products such as a collection of public spectroscopic redshifts are available from the database, but some are provided as fits files.  Links to these fits files can be found in the Available Data page.