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INTEGRAL Science Data Centre
ISDC Frequently Asked Questions
Frequently Asked Questions

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Why is my data download script from Browse issuing many errors ? [ DATA-014 : 2013-MAY-22 ]
When is barycentrization important ? [ DATA-013 : 2010-APR-12 ]
Why should auxiliary data files always be read only ? [ DATA-012 : 2004-MAY-26 ]
What is the time resolution of INTEGRAL ? [ DATA-011 : 2004-MAR-02 ]
Is there a bug in the conversion from OBT to IJD ? [ DATA-010 : 2003-JUL-31 ]
Is the Science Window identifier the same for Near Real Time (NRT) and Consolidated (CONS) data ? [ DATA-009 : 2003-MAY-08 ]
What is the format of the On-Board Time (OBT) ? [ DATA-008 : 2003-APR-11 ]
What is the time origin of the INTEGRAL Julian Date ? [ DATA-007 : 2005-JUL-13 ]
How can I obtain the OBT from the 4 sub-columns stored in FITS files ? [ DATA-006 : 2002-NOV-27 ]
What are the TNULL values usually used in the Housekeeping packets ? [ DATA-005 : 2001-JUN-13 ]
What are the rules for converting housekeeping parameters into FITS compatible names ? [ DATA-004 : 2001-NOV-05 ]
What is the definition of the various exposure times like TELAPSE, LIVETIME, etc. ? [ DATA-003 : 2000-NOV-22 ]
In a FITS table, what is the meaning of other column types like 1U, 1V, etc. ? [ DATA-002 : 2000-MAR-17 ]
In a FITS table, what is the meaning of the column type symbols 1I, 1J, 15A, etc. ? [ DATA-001 : 2000-JUL-25 ]
Complementary information can be found in the ISDC Glossary and in OSA Known Issues.
Please send unanswered questions to the INTEGRAL Helpdesk.
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