Chandra Proposal Information

ANNOUNCEMENTS

12/18/25 The Cycle 28 deadline is 18 March 2026 at 6pm (EDT).


12/18/25 Cycle 28 CfP and POG released. See What's New this Cycle?


Proposal Submission


Instrument & Observatory Information

Count Rate Estimation & Simulators

  • Overview of proposal tools

  • PIMMS: count-rate & flux prediction (online version)

  • PIMMS: count-rate & flux prediction (command-line version)

  • MARX: Chandra data simulator

  • Sherpa: CIAO spectral analysis & simulation package

  • XSPEC: HEASARC spectral analysis & simulation package

  • WebSpec: web version of XSPEC

  • Colden: NH Calculator


Targets Observed & Scheduled with Chandra

Observation Visualization & Planning


Cost Proposals & Grant Info