Version 4.0
December 2011

Cosmic Origins Spectrograph
Instrument Handbook
for Cycle 20

User Support

For prompt answers to any question, please contact the STScI Help Desk.

•	Send e-mail to: help@stsci.edu.

•	Phone: 410-338-1082.

•	Within the USA, you may call toll free: 1-800-544-8125.

World Wide Web

Information and other resources are available on the STScI COS World Wide Web site:

http://www.stsci.edu/instruments/cos

COS Handbook History

Version	Date	Editors
4.0	December 2011	Dixon, W. V.
3.0	December 2010	Dixon, W. V.
2.0	January 2010	Dixon, W. V., and Niemi, S.-M.
1.0	December 2007	Soderblom, D. R.

Additional Contributors

Please see the acknowledgments.

Citation

In publications, please refer to this document as

Dixon, W. V., et al. 2011, Cosmic Origins Spectrograph Instrument Handbook, Version 4.0 (Baltimore: STScI)