Friday 22 March 2024 9.00am EDT
During the last week the observing schedule was replanned to incorporate observations of EP240315A which was accepted as a Director's Discretionary Time Target of Opportunity on Mar 17. Impacted observations will be rescheduled in a future week. Chandra passed through the 24th and 25th eclipses of the season on Mar 17 and 20 respectively, with nominal power and thermal performance. Chandra press and image releases were issued on Mar 21 describing observations of quasar H1821+643. The black hole in the center of the quasar appears to be underactive. Using Chandra, the team found the density of gas near the black hole in the center of the galaxy is much higher, and the gas temperatures much lower, than in regions farther away. Scientists expect the hot gas to behave like this when there is little or no energy input (which would typically come from outbursts from a black hole) to prevent the hot gas from cooling down and flowing toward the center of the cluster. For details, see https://chandra.harvard.edu/press/24_releases/press_032124.html Of note this week, was a letter to the Chandra Community from the Director. See: https://cxc.harvard.edu/cdo/announcement.html The schedule of targets for the next week is shown below and includes observations of A0620-00, which was accepted as a Director's Discretionary Time Target of Opportunity on Mar 7 and is coordinated with JWST. |
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2MASSJ08194059+0823 ACIS-I Mar 25
NGC4261 HRC-I
A0620-00 ACIS-S
Radiation Belts
1E161348-5055.1 ACIS-S Mar 26
MCXCJ0928.6+3747 ACIS-I
NGC4261 HRC-I
A0620-00 ACIS-S
VCC450 ACIS-S Mar 27
2MASSJ08194059+0823 ACIS-I
VCC1450 ACIS-S
4C+62.29 ACIS-S
NGC6204 ACIS-I
Radiation Belts Mar 28
4FGLJ0140.4+5114 ACIS-S
NGC4261 HRC-I
4FGLJ0140.4+5114 ACIS-S Mar 29
SDSSJ122404.62+04563 ACIS-S
4FGLJ0140.4+5114 ACIS-S
SDSSJ131206.32+3909 ACIS-S
FRB20211127I ACIS-S
SNR1987A HRC-S /LETG
NVSSJ122810-092702 ACIS-S Mar 30
DES0424-3317 ACIS-I
RMJ120920.0-021330.2 ACIS-I
DES0424-3317 ACIS-I
SDSSJ094422.03+4727 ACIS-S
Radiation Belts Mar 31
SDSSJ125142.28+2404 ACIS-S
4C+62.29 ACIS-S
SDSSJ125142.28+2404 ACIS-S
UGC4305 ACIS-I
NGC4261 HRC-I------------------------------------------
All spacecraft subsystems continued to support nominal operations.
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Revised: July 08, 2022