Time Domain Astrophysics

The Digital Access to a Sky Century @ Harvard (DASCH) project is pleased to release its second production data release (DR2), covering Galactic latitude b = +75 to +60deg, joining results from DR1 and the 5 "Development Fields" from which the hardware and software pipelines for DASCH were developed. These represent ~6% of the Harvard plate data (1885 - 1992; full-sky). A brief overview of DASCH is given in Grindlay et al (2012) "Opening the 100-Year Window for Time Domain Astronomy" in arXiv:1211.1051 or IAU Symposium Vol. 285 p 29-34.