We present a new , K –selected , optical–to–near infrared photometric catalog of the Extended Chandra Deep Field South ( ECDFS ) , making it publicly available to the astronomical community . Imaging and spectroscopy data and catalogs are freely available through the MUSYC Public Data Release webpage : http : //www.astro.yale.edu/MUSYC/ . The dataset is founded on publicly available imaging , supplemented by original z ^ { \prime } JK imaging data collected as part of the MUltiwavelength Survey by Yale–Chile ( MUSYC ) .
The final photometric catalog consists of photometry derived from UU _ { 38 } BVRIz ^ { \prime } JK imaging covering the full \frac { 1 } { 2 } \times \frac { 1 } { 2 } ~ { } \square ^ { \circ } of the ECDFS , plus H band photometry for approximately 80 % of the field .
The 5 \sigma flux limit for point–sources is K { \mathrm { { } ^ { ( AB ) } _ { tot } } } = 22.0 .
This is also the nominal completeness and reliability limit of the catalog : the empirical completeness for 21.75 < K < 22.00 is \gtrsim 85 % .
We have verified the quality of the catalog through both internal consistency checks , and comparisons to other existing and publicly available catalogs .
As well as the photometric catalog , we also present catalogs of photometric redshifts and restframe photometry derived from the ten band photometry .
We have collected robust spectroscopic redshift determinations from published sources for 1966 galaxies in the catalog .
Based on these sources , we have achieved a ( 1 \sigma ) photometric redshift accuracy of \Delta z / ( 1 + z ) = 0.036 , with an outlier fraction of 7.8 % .
Most of these outliers are X-ray sources .
Finally , we describe and release a utility for interpolating restframe photometry from observed SEDs , dubbed InterRest InterRest can be downloaded from http : //www.strw.leidenuniv.nl/ \sim ent/InterRest .
Documentation , including a complete walkthrough , is available from the same address . .
Particularly in concert with the wealth of already publicly available data in the ECDFS , this new MUSYC catalog provides an excellent resource for studying the changing properties of the massive galaxy population at z \lesssim 2 .