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 an overhaul under the direction of the Harvard College Observatory. During this time, our servers will be down and access to DASCH data via existing interfaces will be limited. Please contact Purvang Patel, Executive Director at the Harvard College Observatory, if you have questions.


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.