The DASCH Photometry Catalog

This preliminary release of the DASCH photometry catalog contains photographic blue photometry for stars within 6 degrees of the center of M44 (08:40:24.000 +19:40:58.80). The photometric errors are typically 0.10 - 0.15 mag with minimum values for stars with magnitudes in the range B ~ 11-13. Details of the photometry are reported in Laycock et al (2010, AJ), Tang et al (2010, ApJL), and Tang et al 2011 in preparation. This release contains 30,739,321 magnitude measurements for over 183,830 GSC 2.3.2 catalog stars. All positions are precessed to J2000 coordinates. Extracts of scanned images are not currently available as part of this release.
To access photometric data enter object ID's (one per line) in the window below. Valid identifications are: J2000 RA DEC (5.45 -81.5 or 5:26:50 -81:35:12 or 8 41 43.8 +19 43 33.5), GSC2.3.2 ID (for the gsc2.3.2 dataset only; e.g. N2312220181), Simbad-searchable object name (S Cnc or X Cnc), or DASCH object (DASCH_J123349.2-113822). All stars within d arcsecs from center, having more than N measurements will be listed. To obtain object's light curve, click on its listed ID.

N >= d <= arcsec

Use frame format Use separate tabs
Name and address (Optional)


Thanks to Grzegorz Pojmanski of the ASAS project for providing the source code on which this interface is based.

Magnitude estimates in the APASS dataset were made possible through the use of the AAVSO Photometric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund.

This work is supported in part by NSF grants AST0407380 and AST0909073 and now also the Cornel and Cynthia K. Sarosdy Fund for DASCH.