Known limitations of the generic tools

• (revision 1 and 2 of the archive) In addition to the time correlation corrections listed in Walter et al, 2003 (A&A 411, L25) a new correction should be added on data taken between 20th August 2003 (rev. 104) and 29th June 2004 (rev. 209) . All UTC (IJD) time stamps derived from on board time should be increased by 385 microseconds. This correction is taken into account in reprocessed data (revision 2 of the archive).
• In revision 3 of the archive, these corrections are not necessary.
• lc_pick: since template version 7.7 a new column was added to the JMX[1,2]-SRC.-LCR and JMX[1,2]-DETE-LCR templates. Therefore the new lc_pick (version 3 and above) cannot work with old data (produced with template version , like OSA 4.2) as input data.
• Make sure that the FTOOLS Package (http://ftools.gsfc.nasa.gov) release you use is 5.3 or newer.
• Spectral analysis tools which are strict with OGIP definitions, e.g., SHERPA or ISIS, refuse to read the OSA produced spectra, because they use a non-standard naming of the extensions and of some keywords. Xspec has been hacked by its developers to overcome this issue.