The target - ZwCl 0857.9+2107 - was observed by ACIS-S for 2 hours and 46 minutes, ended 19 minutes ago, and is part of the proposal What triggered the quasar outburst in the relaxed, cool core cluster Zw2089? The target is located in the constellation Cancer. See related observations: 30381, 30388, 30391, 30400, 30721, 30722, 30723, 30724, 30725, 30726, 30021, 30382, 30386, 30389, 30384, 30385, 30387, 30383, 30755, 30756, 30757, 30396, 30758, 30759, 30397, 30774, 30775, 30776, 30777, 30778, 30779, 30392, 30395, 32105, 32106, 32122, 32123, 30390, 32130, 32131, 32132, 30393, 32144, 30399, 32146.
This was a joint observation with National Radio Astronomy Observatory (NRAO) (for 1 hour and 6 minutes). However, it does not necessarily mean that the observations were done at the same time!
| Target: | ZwCl 0857.9+2107 |
| Observation Details: | 32145 |
| Sequence Summary: | 802203 |
| Proposal Id: | 26800092 |
| Proposal: | Cycle 26, General Observer, CLUSTERS OF GALAXIES |
| Instrument: | ACIS-S |
| Chips: | ACIS-5678 |
| Data Mode: | VFAINT |
| Date: | 17:46 Friday, 6 February 2026 (UTC) |
| Exposure (approved): | 2 hours and 46 minutes |
| Right Ascension: | 09h 00m 36.8s |
| Declination: | +20° 53' 40.1" |
| Roll: | 222° |
| Constellation: | Cancer |
| Joint with: | National Radio Astronomy Observatory (NRAO) for 1 hour and 6 minutes |
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