It's currently 6 PM EDT on Mar 14. There are now 24 hours remaining in the #ChandraCycle25 Call for Proposals. 🛰️
#ChandraScience #Astrodon

Don't forget -- the #Chandra Cycle 25 Call for Proposals closes on March 15 at 6 PM EDT.

All the information you can need is given on our page for proposers: https://cxc.harvard.edu/proposer/, including a section on What's New and FAQs.

Still need help? We're answering your HelpDesk tickets with enhanced staffing. Submit your questions now: https://cxc.harvard.edu/helpdesk/

And remember -- your references now get their own page! #ChandraScience #Astrodon #XRayAstronomy #Astrophysics #Astronomy #NASA

Did you catch our recent #ChandraScience image of Abell 2256, a spectacular merger of at least three galaxy clusters? The hot gas components of these clusters is traced with X-rays -- shown here in blue, using data from us (#Chandra) and our ESA-led friends at #XMM-Newton. This cosmic collision is also a source of radio emission, shown in red from #LOFAR, #GMRT, and the #VLA, produced via particle acceleration. For more details, see
https://chandra.si.edu/photo/2023/a2256/
#Astronomy #Astrodon #Astrophysics

For further information, please see the original announcement concerning the anomaly: https://groups.google.com/a/cfa.harvard.edu/g/chandra-announce/c/xU-JkgAD0Vg/m/dqYqcfKwBgAJ; the follow-up from two weeks later: https://groups.google.com/a/cfa.harvard.edu/g/chandra-announce/c/uGepynsSipk/m/cC8GOdNDBwAJ; and the most recent previous update from this September: https://groups.google.com/a/cfa.harvard.edu/g/chandra-announce/c/7O064uJmQ4Y/m/UZiaCU1BAgAJ.

Summarizing these previous announcements: Last February, the HRC instrument was found to be in an anomalous state and was shut down. The issue was traced to the +/- 15 V power supply. #Chandra #ChandraXRay #ChandraScience

An update on the HRC Return to Science. A text version is available here: https://groups.google.com/a/cfa.harvard.edu/g/chandra-announce/c/XfWZdG8juMM/m/LLC1gdvGAQAJ

In short: following the anomaly of last year, science and engineering teams have devised a mode of operations that has been successful for four observations. This involves limiting durations of observing segments to 15 ks. We intend to begin scheduling HRC observations under these constraints the week of 06 March. #Chandra #ChandraXRay #ChandraScience #Astrophysics #Astrodon #Astronomy #NASA