DASCH: Digital Access to a Sky Century @ Harvard
A New Look at the Temporal Universe

Project Status

The DASCH project has been a herculean effort spanning two decades. In order to ensure that the plate scanning is brought to completion, and that the resulting data are archived and as useful as possible, the project is undergoing a technical overhaul under the direction of the Wolbach Library. During this time, our servers will be down and access to DASCH data via existing interfaces will be limited. Please contact Daina Bouquin, Head Librarian of the Wolbach Library, if you have questions. We will do everything we can to respond to your request.

By making the DASCH project part of the Library's portfolio of initiatives we are able to more fully benefit from resources available through the Harvard Library and the Weissman Preservation Center, in addition to gaining access to support from our expert colleagues at the Smithsonian Institution

We are excited about this new phase of the project and looking forward to sharing updates as we make progress.


The DASCH project at Harvard is grateful for partial support from NSF grants AST-0407380, AST-0909073, and AST-1313370; which should be acknowledged in all papers making use of DASCH data.

We acknowledge the one-time gift of the Cornel and Cynthia K. Sarosdy Fund for DASCH, and thank Grzegorz Pojmanski of the ASAS project for providing some of the source code on which the DASCH web-interface is based.

The ongoing AAVSO Photometric All-Sky Survey (APASS) has improved DASCH photometric calibration and is funded by the Robert Martin Ayers Sciences Fund.