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ISDCCDCI
INTEGRAL Science Data Centre
ISDC Frequently Asked Questions
Frequently Asked Questions

  or     in all 146 FAQs

Note: The search is case insensitive, so use lower case characters to avoid confusion with categories. For clarity, answers are only displayed for a string search matching less than 10 FAQs.

Is it right that ii_light can cope with telemetry problems ? [ IBIS-031 : 2015-SEP-09 ]
What is the difference between isgri_srcl_res.fits and isgri_mosa_res.fits ? [ IBIS-030 : 2013-JAN-10 ]
What is the sensitivity of IBIS/ISGRI ? [ IBIS-029 : 2010-JUL-30 ]
What is the size of the fully-coded field of view of ISGRI ? [ IBIS-028 : 2010-JUL-26 ]
Why is there an option to fit negative sources in ISGRI images ? [ IBIS-027 : 2010-JUN-10 ]
Why is the Crab count rate not constant in ISGRI ? [ IBIS-026 : 2010-OCT-15 ]
Why do I get many ghost structures in my ISGRI mosaic with OSA 9 ? [ IBIS-025 : 2014-SEP-04 ]
How can I get a correct effective IBIS exposure map for my observation ? [ IBIS-024 : 2008-JUN-09 ]
Why does spectral fitting of an ISGRI spectrum of the Crab result in big residuals ? [ IBIS-023 : 2008-APR-30 ]
Rerunning the spectral extraction gives an error -122224, what shall I do ? [ IBIS-022 : 2007-OCT-24 ]
In which condition the flux error has a NULL value in ISGRI results ? [ IBIS-021 : 2007-JUN-28 ]
How can I recover from an error -122106 in ISGRI spectral analysis ? [ IBIS-020 : 2007-JUN-28 ]
What is the Crab count rate in IBIS/ISGRI ? [ IBIS-019 : 2007-NOV-20 ]
How to find a bad science window corrupting an ISGRI mosaic image ? [ IBIS-018 : 2005-MAY-27 ]
How can I estimate an upper limit for a non-detected source ? [ IBIS-017 : 2010-JUL-30 ]
What is the meaning and use of the OBS1_PixSpread parameter ? [ IBIS-016 : 2005-MAY-26 ]
Is there a dead area between the eight ISGRI detector modules ? [ IBIS-015 : 2005-MAY-26 ]
What is the origin of 4 or 8 sec periodicities found in ISGRI events ? [ IBIS-014 : 2005-MAY-26 ]
How can I force the ISGRI analysis to search for more sources ? [ IBIS-013 : 2012-JAN-10 ]
What is the meaning of ISGRI source flux errors equal to zero ? [ IBIS-012 : 2005-MAY-25 ]
What can I do if the obtained IBIS spectrum is not significant ? [ IBIS-011 : 2005-MAY-25 ]
How can I extract a spectrum for an arbitrary position in the ISGRI image ? [ IBIS-010 : 2005-MAY-25 ]
How can I estimate the ISGRI sensitivity for extended objects ? [ IBIS-009 : 2005-MAY-25 ]
What shall I do if my ISGRI spectral extraction fails because of too many sources ? [ IBIS-008 : 2005-MAY-25 ]
What shall I do if my ISGRI mosaicing always crashes at the same Science Window ? [ IBIS-007 : 2005-MAY-31 ]
Does the list of Science Windows needs to be sorted for ii_skyimage ? [ IBIS-005 : 2005-MAY-23 ]
Could it be that the ISGRI spectral extraction results depend on the input catalogue ? [ IBIS-004 : 2004-MAR-04 ]
Can I extract a meaningful spectrum from ISGRI mosaic images ? [ IBIS-003 : 2005-AUG-08 ]
How can I use my self-defined GTI in my IBIS analysis ? [ IBIS-002 : 2004-JAN-23 ]
Why is the IBIS mask pattern visible in some sky images ? [ IBIS-001 : 2003-SEP-10 ]
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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