SVOM Science Ground Segment

Transcription

1 SVOM Science Ground Segment Maohai Huang National Astronomical Observatories, CAS on behalf of the SVOM Ground Segment team Hotwiring the Transient Univserse V, Villanova, M. Huang 1

2 GRB Mission SVOM The Space-based multiband astronomical Variable Object Monitor (SVOM) is a collaborative project between China and France to detect, localize and study of ~60 Gamma Ray Bursts (GRBs) per year. SVOM is being transformed into a time-domain orbital observatory. Passed PDR and goes into Phase C starting Planned to be launched to a low inclination, low earth orbit in 2021, with a life of 3-5 years Hotwiring the Transient Univserse V, Villanova, M. Huang 2

3 Payload instruments ÉCLAIRs, dedicated to GRB trigger and localization, having a large field of view (FOV) which can detect GRBs in the hard X-ray energy band (CNES, IRAP, CEA, APC) GRM (Gamma Ray Monitor) dedicated to measurement of gamma-ray in high energy band (IHEP) VT (Visible Telescope ) an optical instrument dedicated to GRB follow-up observation on board (XIOPM) MXT (Micro-Channel X-ray Telescope) dedicated to GRB follow-up observation in soft X-ray band (CNES, CEA, LAL, UL, MPE). Ground based instruments C-GFT, the Chinese ground follow-up telescope nm GWAC, an array of ground wide angle cameras nm 5000 SqDeg F-GFT, the French ground follow-up telescope nm X-band antenna STR GRD VT GPS antenna Eclairs S-band antenna MXT VHF antenna STR Platform Hotwiring the Transient Univserse V, Villanova, M. Huang 3

4 Overview of SVOM ground segment French Ground Segment Chinese Ground Segment VHF network French X band station French S band station (ToO prog) CLTU, PDP, RAF Chinese S band station S band raw data,tc FGFT GFTs Instrument Burst Advocate GRB Alert French Science ECLAIRs instrument center VHF data MXT instrument center GRB notices and circulars Level 1, 2 and 3 French Network Operation French Payload Operation Orbit, pass-req, PLTM... L0c, Aux data, TC logbook Scientific products L1, L2, L3 Work Plan FPL TC plan, TC Logbook. FPL HK L0c, FPL S band HK0 Aux Data Chinese X band station X band raw data Mission X band raw data, S band HK0, Aux data, TC logbook, Space Science Data Science products SVOM users GRB worldwide network (GCN, VO) S band HK0, TC, Orbit,... Workplan, orbital events CPL TC plan Pointing TC plan L0c, Aux data, TC logbook Scientific products L1, L2, L3 Chinese Control Chinese Science GRB notices and circulars related to GRM and C-GOS General program : Call for OBS GWAC C-GOS SVOM PIs CGFT Pointing request : GRB Revisit, ToO OBS program TBC SVOM users Robotic telescopes Satellites SVOM users Hotwiring the Transient Univserse V, Villanova, M. Huang 4

5 SVOM Observing Programs Core Programs (GRB) General Programs ToO Programs Nominal ToO (including revisit of GRBs) Exceptional ToO Hotwiring the Transient Univserse V, Villanova, M. Huang 5

6 Core Program actions and time requirements from satellite to VOEvent network / GCN Data acquisition on board T0+22 sec Onboard instruments X-band and S- band telemetry VHF Network Ground Stations VHF Data (All onboard instruments) 5 sec GRB Notices 5 sec VOEnet, GCN FSC (CEA, Saclay) FGFT Alert notice 5 sec CSC (NAOC, Beijing) Alert notice 2 sec Mission Space Sci. Data L0 data T0+4 to +14 hour Final Products T0+24 hour Responsible Science (CSC or FSC) GRB Community GRB Notices and Circulars As soon as available Burst Advocate and Instr. Scientists and Engrs GFT Observing results 5 min GWAC results -5 min CGFT GWAC Many telescopes can be added to follow-up networks with flexibility Hotwiring the Transient Univserse V, Villanova, M. Huang 6

7 GRB (Core) Program Hotwiring the Transient Univserse V, Villanova, M. Huang 7

8 General Programs 1. PIs issue call for proposal once a year for ÉCLAIRs, VT, MXT, and ground instruments 2. Observers write and submit proposal with tools supported by the Science s 3. TAC evaluates, selects and allocates time, and form a one-year Pre-Planned Target 4. PPT executed by the Mission, subject to interruption and re-scheduling due to Core and ToO activities 5. Once observed, data are processed in standard pipeline and released to observer. the details are being refined Hotwiring the Transient Univserse V, Villanova, M. Huang 8

9 GP and ToO workflow as of PDR Hotwiring the Transient Univserse V, Villanova, M. Huang 9

10 Exceptional ToO Obs Proposal Exceptional ToO Obs Proposal PI ToO obs feasibility OK System tool PI T0 ToO obs feasibility ToO Request T0 + 2h OK System tool Exceptional ToO OCG approval Exceptional ToO observation: from obs. proposal to satellite execution T0 T0 + 4h T0 + 6h ToO Request FPL command Plan Development French Payload Operation Mission Merging of French and Chinese PL Command Plans OK ToO Work plan Elaboration CPL Command Plan Development Mission ToO Obs plan ID ToO Type Mission Horizon Targets ID Targets Coordinates. PF Command Plan Development Chinese Control Mission Merging of all command plans Satellite Command T0 + 7h Plan upload Chinese Control Satellite command Plan Chinese Control Satellite Command Plan upload Chinese Ground Station French Ground Station Chinese Control Chinese Ground Station French Ground Station Maxi T0 + 12h Maxi T0 + 12h Satellite On board execution Satellite On board execution Hotwiring the Transient Univserse 10 V, Villanova, M. Huang

11 ToO Summary ToO Approval From acceptance/ trigger GRB interruption ToO-NOM PI <48h Yes ToO-EX PI <12h No Frequency Duration MAX 1/day => 5/day Tiling process Science product availablity VHF Canal VHF data 1 orbit No 24h No - MAX 1/month 1-14 orbits No 24h No - ToO-MM Automatic +PI <12h No MAX 1/month 1-14 orbits Yes, 3 tiles/orbit VHF<1h BX 24h Yes MXT photon-list ToO-NOM : ToO-CP (GRB revisit) ToO-GP-PP (Pre-plannedGeneral Program targets) ToO-GP-NP (General Program targets not planned) ToO-EX : for exceptional astrophysical events ToO-MM : search for EM counterpart to multi-messenger alert Hotwiring the Transient Univserse V, Villanova, M. Huang 11

12 Ground telescopes SVOM to use External large and robotic telescopes and missions VHF alerts, Circulars VOENet GCN GWAC FSC Burst Advocate CSC VOE Node VTP/XMPP/ZMQ Data Server F-GFT VOE Node Data Prod. VOE Node VOE Node Internet VTP/XMPP/ZMQ C-GFT Data Server Data I/O Server Data I/O Server FTP VOE Node San Pedro Martir Obs. (Mexico ) FTP Data Server Dynamic expandable GFT network. Baseline location at Xinglong Two base-line ground follow-up telescopes with guaranteed fast (T0+5 min) turn around photometric results. More telescopes can and will join the network with flexibility (implementing a standard interface). A wide angle camera array as a time-machine (T0-5 min) Burst Advocates (BAs) will coordinate extensive use external large telescopes and missions for multiband and spectroscopic follow-ups Hotwiring the Transient Univserse V, Villanova, M. Huang 12

13 Overall development approach There is significant risk in SGS readiness if a Water Fall development approach is adopted, where a full functional system only come into existence at the end of Satellite/System development. To mitigate the risk, the Science s are to follow an iterative approach to develop a Basic simulation system, a Core function system, and a Full system in Phase B, C, D, respectively. The goal is that by the time of launch, the SGS will be highly mature. It will have been used by its users for years to process simulation data, ground instrument data, and payload testing data during development phases. There will be a smooth, seamless transition between mission phases Hotwiring the Transient Univserse V, Villanova, M. Huang 13

14 summary SVOM ground segment is being designed to offer guaranteed followup capabilities, quick reaction time, a flexible architecture, and essential infrastructure to meet the requirements of SVOM observation programs as time-domain astronomy enters a rapidly expanding period. Wishes A pool of follow-up telescopes implementing a standard interface (data, control, condition), ready to observe with little human negotiation. Automated broker/aggregator to provide not only all available data of a given position with error box, but also all scheduled observation of that position in a given time window in near future. APIs need to be in place by telescope facilities for this. A mobile multimedia platform to connect BAs, IS/IEs (instr. Scientists and experts), proposal observers, and anyone who has observed the target, and make result sharing easy Hotwiring the Transient Univserse V, Villanova, M. Huang 14

15 Thank you Hotwiring the Transient Univserse V, Villanova, M. Huang 15