The Public ESO Spectroscopic Survey of Transient Objects (PESSTO) is one of the two on-going ESO public spectroscopic surveys. It aims to deliver detailed, high-quality, time series optical and near infrared spectroscopy of 150 optical transients covering the full range of parameter space that the current synoptic surveys now deliver: luminosity, host metallicity, explosion mechanisms. This will build a comprehensive understanding of the exotic, explosive Universe.

Data products resulting from the first release of PESSTO are now available via the dedicated Phase 3 query interface at the ESO Science Archive Facility. This data release consists of optical (NTT/EFOSC2) and NIR (NTT/SOFI) wavelength-calibrated 1-dimensional spectra of supernovae and optical transients brighter than 20.5mag, observed between April 2012 and April 2013 under ESO program ID 188.D-3003. The total number of data files submitted in this release is 909 1-d spectra and the corresponding 909 2-d spectra (downloadable as ancillary files associated to the 1-d products), of 298 unique targets. The total data volume of this release is 3 GB.

The 1d spectra are published using the tabular format following the established standard for ESO science data products. The PESSTO public survey data release is accompanied by a comprehensive description.

Instructions on how to read or display data in the ESO/SDP tabular data format can be found in the 1D spectrum data format help page.