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Operations CXO Status Report

Friday 1 February 2019 9.00am EST

During the last week Chandra completed the observing schedule as planned.

A real-time procedure was executed on Jan 31 to swap the prime solid-state recorder (SSR) from the B-side to the A-side. This swap concludes a six-month interval of health and trending data collection on SSR-B.

A Chandra press release was issued on Jan 29 describing results from a new approach to determining distance to quasars. Based on data from NASA's Chandra X-ray Observatory, ESA's XMM-Newton, and the Sloan Digital Sky Survey, the new method allows measurement of greater distances than has been possible earlier. While agreeing with the conventional cosmological model at smaller distances, the new approach suggests that there are deviations from the model at the largest distances, corresponding to the earliest stages of the Universe, that can be interpreted in terms of a dark energy density that increases with time. For details see:

The schedule of targets for next week is shown below and includes an observation of Mrk1018 coordinated with HST and an observation of MAXIJ1820+070 coordinated with VLA.

        Radiation Belts
        J0833+0959             ACIS-S
        MKN421                 ACIS-S/LETG
        MAXIJ1820+070          ACIS-S
        MKN421                 ACIS-S/LETG
        MAXIJ1820+070          ACIS-S       Feb  5
        MKN421                 ACIS-S/LETG
        SDSSJ1050+0017         ACIS-I
        Radiation Belts                     Feb  6
        Mrk1018                ACIS-S
        SDSSJ1050+0017         ACIS-I
        MKN421                 ACIS-S/LETG
        NGC424                 ACIS-S       Feb  7
        Mrk1018                ACIS-S
        A133filament           ACIS-I
        UGC4211                ACIS-S       Feb  8
        MKN421                 ACIS-S/LETG
        Radiation Belts
        A133filament           ACIS-I
        Radiation Belts                     Feb  9
        MKN421                 ACIS-S/LETG
        HCG57                  ACIS-S
        PSRJ1709-4429          ACIS-I
        Z31-72                 ACIS-S       Feb 10
        SDSSJ084205.57+07592   ACIS-S
        SDSSJ081331.13+04094   ACIS-S
        Radiation Belts                     Feb 11


All spacecraft subsystems continued to support nominal operations.

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