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| Acronym | Explanation |
|---|---|
| ACIS | Chandra CCD Imaging Spectrograph |
| AHF | Attitude History File |
| AMS | Archival Management Subsystem |
| AO | Announcement of Opportunity |
| AOCS | Attitude and Orbit Control and Measurement Subsystem |
| CAMEX | CMOS Amplifier and Multiplexer Chip |
| CCD | Charge Coupled Device |
| CCF | Current Calibration File |
| Chandra | Chandra X-Ray Observatory |
| CTE | Charge Transfer Efficiency |
| CTI | Charge Transfer Inefficiency |
| DPU | Digital Processing Unit |
| EPIC | European Photon Imaging Camera |
| ERMS | EPIC Radiation Monitor Subsystem |
| ESAC | European Space Astronomy Centre |
| FAQ | OM Field Acquisition |
| FITS | Flexible Image Transport System |
| FOV | Field Of View |
| FWHM | Full Width at Half Maximum |
| GO | Guest Observer |
| GT | Guaranteed Time |
| GUI | Graphical User Interface |
| HEASARC | (NASA) High Energy Astrophysics Science Archive Research Center |
| HED | High Energy Detector (of the ERMS) |
| HER | RGS high event rate (selectable mode) |
| HETG | (Chandra) High Energy Transmission Grating |
| HEW | Half Energy Width |
| HRC | (Chandra) High Resolution Camera |
| LED | Low Energy Detector (of the ERMS) |
| LETG | (Chandra) Low Energy Transmission Grating |
| LSF | Line-spread Function |
| MCP | Micro-Channel Plate |
| MIC | Micro-Channel Plate Intensified CCD |
| MIP | Minimum Ionising Particle |
| MOS | Metal Oxide Semi-conductor |
| MPM | RGS Multipointing Mode |
| OCB | On-Chip Binning |
| ODF | Observation Data File |
| OM | Optical Monitor |
| OTAC | Observatory Time Allocation Committee |
| PHA | Pulse Height Analyser |
| PHS | Proposal Handling Subsystem |
| PI | Principal Investigator |
| PIMMS | Portable, Interactive Multi-Mission Simulator |
| PPS | Pipeline Processing Subsystem |
| PSF | Point-Spread Function |
| PV | Performance Verification |
| QE | Quantum Efficiency |
| RAF | Raw Attitude File |
| RFC | RGS Focal Camera |
| RFS | Refreshed Frame Store (readout mode of EPIC MOS) |
| RGA | Reflection Grating Assembly (of the RGS) |
| RGS | Reflection Grating Spectrometer |
| RPE | Relative Pointing Error |
| RPS | Remote Proposal Submission software |
| SAS | Science Analysis Software |
| SciSim | XMM-Newton Science Simulator |
| SDF | Slew Data File |
| SOC | XMM-Newton Science Operations Centre |
| SSC | Survey Science Centre |
| UHB | XMM-Newton Users Handbook |
| URL | Unique Resource Location |
| UT | Universal Time |
| W90 | 90% energy width |
| XID | X-ray source identification (by the SSC) |
| XMM-Newton | X-ray Multi-Mirror Mission |
| XRPS | XMM-Newton Remote Proposal Submission software |
| XSA | XMM-Newton Science Archive |
European Space Agency - XMM-Newton Science Operations Centre