Chandra X-Ray Observatory

Chandra Proposal Information

Submit a Proposal (RPS)
Call for Proposals (CfP)
Proposers' Observatory Guide (POG)
CXC HelpDesk
DDT and/or TOO Requests

Cycle 18 proposal deadline:
March 15, 2016, 6PM EDT

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What's New this Cycle?


12/15/2015 The Cycle 18 Call for Proposals and Proposers' Observatory Guide have been Released. Refer to the What's New page for a list of the most significant changes in Cycle 18.

12/15/2015 Please be aware that a complete proposal will include the following components as separate files:

   1: Proposal Form (submitted through RPS; required)
   2: Science Justification (separate file upload in RPS; required)
   3: Previous Chandra Experience List (separate file upload in RPS; required if appropriate)
   4: Curriculum vitae (separate file upload in RPS; optional)

Proposal Related Documentation
Instrument and Observatory Information
Proposal Threads (from Cycle 17 unless marked updated)
Archive and Theory Proposals
  • Proposals to fund archival research or theoretical work using public Chandra data should be submitted through RPS. Archival proposals must include a short justification of costs. Refer to the CfP for specific details.

Observing Proposal Preparation and Submission
Cost Proposals and Grant Information (Cycle 17)
Tools to Aid in Proposal Preparation
Targets Observed and Scheduled with Chandra
Count Rate Estimation and Simulators
Observation Visualization and Planning
Useful Proposal Preparation Tools
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The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA.   Email: Smithsonian Institution, Copyright © 1998-2016. All rights reserved.