Page created: Tuesday, 09 Jun 2026 21:20:53 UTC

The target - Cyg X-1 - is being observed by ACIS-S and the High Energy Transmission Grating (HETG) for 2 hours and 46 minutes. The observation started 1 hour ago and ends in 2 hours, and is part of the proposal Simultaneous Chandra and XRISM Spectroscopy of the Multi-Phase Focused Wind in Cygnus X-1. The target - also called HD 226868 - is located in the constellation Cygnus and is a High Mass X-ray Binary. More information on the target can be found at SIMBAD.

This is a time-critical observation.

This is an observation from a TOO (target of opportunity) proposal.

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