TIPTOPbase

TIPTOPbase is a public, interactive database service implemented to access the atomic data computed in the international collaborations referred to as the Opacity Project (OP) and the IRON Project (IP). It is the upgrade of the TOPbase facility that was originally installed at CDS in 1993. The following databases and interactive servers are currently offered:

TOPbase: on-line interactive database containing LS atomic data (energy levels, f-values and photoionisation cross sections) computed in the OP
TIPbase: online interactive database containing fine-structure atomic data (energy levels, A-values and electron impact excitation collision strengths and rates) computed in the IP
OPserver: An interactive server for online computing of opacities for arbitrary chemical mixtures. Data and codes have been updated with the release OPCD_2.0 (01-12-04).

Complete package (data, codes and instructions) to compute mean opacities and accelerations is now available. It contains improved opacities and a suite of versatile, easy-to-use codes. Download from Opacity Project home page.

For further enquiries or user support, contact:

Claudio Mendoza: Physics Center, IVIC, Caracas, Venezuela.
Claude Zeippen: Observatoire de Paris, Meudon, France.
Anil Pradhan: Astronomy Department, Ohio State University, Columbus, USA.

An access to the old version of the Opacity Project database (topbase) as described in the paper by Cunto et al. (1993A&A...275L...5C) is still possible from here.