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ASTRO-F Observer's Manual ASTRO-F Observer’s Manual Version 3.2 — for Open Time Observation Planning — ASTRO-F User Support Team in Institute of Space and Astronautical Science / JAXA contact: iris [email protected] European Space Astronomy Centre / ESA contact: http://astro-f.esac.esa.int/esupport/ November 29, 2005 Version 3.2 (November 29, 2005) i Revision Record 2005 Nov. 29: Version 3.2 released. Updated description of IRC FoV and slit (Section 5.1.4 and 5.1.5). Updated IRC04 detection and saturation limits. Also improve the description (Section 5.5.9). Section 5.4.2 revised to clarify the point. Units for Ho given value in p.113. 2005 Nov. 8: Version 3.1 released. Updated Visibility Map for Open Time Users (Figure 3.4.3) Information for the handling of Solar System Object observations (Section 3.4) Updated saturation limits for FTS (FIS03) mode (Table 4.4.16) IRC04 detection limits for NG+Np added (Table 5.5.25,5.5.26) Updated worked examples using the latest versions of the Tools (Section B) ESAC web pages URL and Helpdesk contact address updated Numerous errors and typos corrected 2005 Sep.20: Version 3.0 released. Contents 1 Introduction 1 1.1Purposeofthisdocument............................... 1 1.2RelevantInformation.................................. 3 2 Mission Overview 5 2.1TheASTRO-FMission................................ 5 2.2 Satellite . ........................................ 6 2.2.1 TheBusModule................................ 6 2.2.2 AttitudeDeterminationandControlSystem................. 7 2.2.3 Cryogenics................................... 8 2.3Telescope........................................ 9 2.3.1 Specification.................................. 9 2.3.2 Pre-flightperformance............................. 10 2.4Focal-PlaneInstruments................................ 11 2.4.1 SpecificationOverview............................. 11 2.4.2 Focal-PlaneLayout............................... 14 2.4.3 TheFocal-PlaneStarSensor(FSTS)..................... 15 2.5TheASTRO-FObservationProgramms....................... 16 3 Satellite Operations 17 3.1OrbitandObservingAttitude............................. 17 3.2AttitudeOperationModesforObservations..................... 19 3.2.1 SurveyMode.................................. 19 3.2.2 PointingMode................................. 19 3.3MissionPhases..................................... 22 3.4 Sky Visibility . ................................. 23 4 FIS: Far-Infrared Surveyor 27 4.1HardwareSpecification................................. 28 4.1.1 Overview.................................... 28 4.1.2 OpticsandFilters............................... 29 4.1.3 DetectorSystem................................ 31 4.1.4 TheFourierTransformSpectrometer(FTS)................. 33 4.1.5 InstrumentOperation............................. 35 4.2Pre-flightperformance................................. 36 4.2.1 Optics...................................... 36 4.2.2 Detectorsystem................................ 40 4.2.3 FTSmode.................................... 46 4.3TheFISAll-SkySurvey................................ 49 4.3.1 Operation.................................... 49 ii Version 3.2 (November 29, 2005) iii 4.3.2 ExpectedPerformance............................. 50 4.4TheFISPointedObservations:AOTs........................ 52 4.4.1 FIS01:Photometry/MappingofSmallArea................ 52 4.4.2 ExpectedPerformanceofFIS01........................ 55 4.4.3 FIS02:Mappingoflargearea......................... 57 4.4.4 ExpectedPerformanceofFIS02........................ 58 4.4.5 FIS03:FTSSpectroscopy........................... 59 4.4.6 RemarksandConstraintsoftheFISObservations............. 63 5 IRC: Infrared Camera 65 5.1HardwareSpecification................................. 66 5.1.1 Overview.................................... 66 5.1.2 Optics...................................... 67 5.1.3 FiltersandDispersionElements....................... 68 5.1.4 FieldofView(FoV).............................. 69 5.1.5 SlitsforSpectroscopy............................. 69 5.1.6 Detectors.................................... 70 5.2Pre-flightperformance................................. 71 5.2.1 Optics...................................... 71 5.2.2 Detectorsystem................................ 78 5.3TheIRCInstrumentOperation............................ 80 5.3.1 PointedObservations............................. 80 5.3.2 TheIRCScanObservation.......................... 82 5.4TheIRCAll-SkySurvey................................ 83 5.4.1 Operation.................................... 83 5.4.2 ExpectedPerformance............................. 84 5.5TheIRCAOTs..................................... 85 5.5.1 DetectionLimitsandSaturationLimits:GeneralRemarks......... 86 5.5.2 IRC00:DeepImagingMode.......................... 88 5.5.3 ExpectedPerformance............................. 89 5.5.4 IRC02:ImagingwithTwoFilters....................... 90 5.5.5 ExpectedPerformance............................. 91 5.5.6 IRC03:ImagingwithThreeFilters...................... 92 5.5.7 ExpectedPerformance............................. 93 5.5.8 IRC04:Spectroscopicmode.......................... 94 5.5.9 ExpectedPerformance............................. 96 5.5.10IRC11:Slow-Scanmode............................ 98 5.5.11ExpectedPerformance............................. 99 5.6NotesandRestrictionsfortheIRCObservations.................. 100 6 Data Reduction and Products 101 6.1BasicPolicy....................................... 102 6.2LargeAreaSurveys................................... 103 6.2.1 All-SkySurvey................................. 103 6.2.2 ASTRO-FPointSourceCatalogues...................... 103 6.2.3 ImageMaps................................... 104 6.3PointedObservationData............................... 105 6.3.1 FISDataReduction:AOTFIS01,02..................... 105 6.3.2 FISDataReduction:AOTFIS03....................... 105 6.3.3 IRCDataReduction:AOTIRC00,02,03.................. 106 iv ASTRO-F Observer’s Manual 6.3.4 IRCDataReduction:AOTIRC04...................... 106 6.3.5 IRCDataReduction:AOTIRC11...................... 107 A Confusion Limits and ASTRO-F 109 A.1Introduction....................................... 109 A.2ConfusionduetoInfraredCirrus........................... 109 A.3 The Extragalactic Source Confusion Limit . ................ 110 B ASTRO-F Cookbook for Open Time Observations 115 B.1Introduction....................................... 115 B.2 Example 1: Imaging of extragalactic fields with the IRC and FIS ......... 116 B.2.1ScientificBackground............................. 116 B.2.2 Selection of Target Field and Target Visibility ................ 117 B.2.3PreparationofTargetList........................... 119 B.2.4TargetListValidation............................. 123 B.2.5DuplicationCheckTool............................ 125 B.2.6EstimationofSensitivityforIRC....................... 127 B.2.7EstimationofSensitivityforFIS....................... 127 B.2.8 Submission of Proposal . ....................... 131 B.3Example2:SpectroscopyofPlanetaryNebulaewiththeIRC........... 132 B.3.1ScientificBackground............................. 133 B.3.2 Target Visibility . ....................... 134 B.3.3PreparationofTargetList........................... 135 B.3.4TargetListValidation............................. 137 B.3.5DuplicationChecker.............................. 138 B.3.6EstimationofSensitivityforIRC....................... 139 B.3.7 Submission of Proposal . ....................... 141 Chapter 1 Introduction 1.1 Purpose of this document This ASTRO-F Observer’s Manual, is issued as the reference for ASTRO-F observers, for obser- vation planning and the preparation for the data analysis. The current version (3.0) is mainly used for the preparation of Open Time Proposals. The document covers the specifications of the satellite and the instruments, their perfor- mance, flight operation plan, including definitions of the Astronomical Observation Templates (AOTs), and the data reduction system. It contains the most up-to-date estimates of the detec- tion limits of the instruments (based on the performance evaluation tests carried out over the last few months). This version (version 3) contains more a detailed introduction to the mission and instruments, guidance to the users on how to prepare their observations, and the scope for the data reduction. Information about the scientific programmes and proposal handling are not included in this document. Users are suggested to refer to other information resources (see the next page). Note that some of the instrumental performance information was not yet available by the time of the publication of this edition version. Frequent updates will be given on the Observer’s support Web page. 1 2 ASTRO-F Observer’s Manual Figure 1.1.1: ASTRO-F on the vibration test bench (May, 2005). Version 3.2 (November 29, 2005) 3 1.2 Relevant Information ASTRO-F Observer’s Web The ISAS Web page contains some additional information and data useful for the ob- servers. Also links to the user support tools are given: URL:http://www.ir.isas.jaxa.jp/ASTRO-F/Observation/ The ESAC page includes mission overview, fact sheet, and user support policy for the European Open Time proposals. Web tools are also available. URL:http://astro-f.esac.esa.int/ Helpdesk Any questions and comments on ASTRO-F observations and user support are addressed to the ASTRO-F Helpdesks. iris [email protected]: for Japanese & Korean Open Time Users and general inquiry. http://astro-f.esac.esa.int/esupport/ :forESAOpenTimeUsers 4 ASTRO-F Observer’s Manual Chapter 2 Mission Overview 2.1 The ASTRO-F Mission ASTRO-F
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