The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 20 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. The survey is open until Dec 18, 2023. We thank you in advance for your valuable feedback.
Return to the PCA Digest page.
Background model epoch boundaries are listed below. Observers who
still use invidividual background files can download them from here.
Use these only if you have a special need.
NOTE: It will be much more convenient to use the mission-long
background models listed on the main PCA
Digest page.
If you have a question about RXTE, please send email to one of our
help desks.
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