a step antarctica search for transiting extrasolar planets
Post on 07-Jan-2016
44 Views
Preview:
DESCRIPTION
TRANSCRIPT
A STEPA STEP Antarctica Search for Transiting Antarctica Search for Transiting
Extrasolar PlanetsExtrasolar Planets
Technical design and work packages
Telescope choice
IRAIT Telescope Nasmyth focus adaptation
Excluded because of late problems of IRAITLots of dedicated systems for optical photometry would have been required
Telescope choice
Meade 16 telescope tube
Excluded because of problems of antarctisation of that telescopeNo real advantage on Newton telescope
Telescope choice
Minitrust optical design
Optical combination with 3 mirors for wide field photometry with active optics – no astigmatism and achromatic
Excluded because of problems with focal plane installation, necessity of redesigning for Antarctica, size of the central obstruction and weight (45 cm nominal design)
Telescope choice
Newton telescope vs Rictchey Chretien
Similar behaviours for fiels around 1 °, but increased sensibility of RC to telescope tube dilatations Important PSF shape changes with differential dilatations RC combination not optimal for slightly defocused telescopes
CCD DW 436 (Andor)Size 2048 x 2048Pixel size 13.5 m1.74 arcsec on sky
Telescope choice
Newton 30 cm or 40 cm
According to telescope mount possible payload
Specific prototype built with Optique & Vision and ERI
Telescope tube built with an INVAR structure and carbon fiber cover
CCD DW 436 (Andor)Size 2048 x 2048Pixel size 13.5 m1.74 arcsec on sky
Newton 40 cm nominal configuration
A STEP Characteristics:
Camera use:Defocused PSFPSF sampling: FWHM covering ~4 pixelTime exposure: 10sReadout time: 10s
Telescope mount:German Equatorial Astrophysics 1200With controlled heatingPointing precision tolerated ~.5”
Data storage: ~500 GB /campaignData retrieval at the beginning of Antarctic Summer for first campaigns
A STEP camera
CoRoT backup available CCDs
Excluded because of work to adapt and build CCDs environment for A STEP
Andor DW436
See Alain presentation
-2048x2048 pixel-Backwards illuminated CCD-Limited intra-pixel fluctuations (Karoff 2001)-Excellent quantum efficiency in red-USB2 with antarctisable connection-Performances guaranted by constructor
Telescope mount
Astrophysics 1200 or
New Astrophysics prototype if available on time
See Karim presentation
Telescope tube:INVAR structure With Carbon fiber cover
Thermal enclosure for focal instrumentation
Wynne Corrector
4Mpixel DW436 CCD
Newton optical combination
Work packages and early schedule
WP1 - Mechanical design
6 JB Daban-F Fressin-F Valbousquet-K Agabi-OCA groupe projet-LUAN groupe projet
Design of telescope tube structure, telescope to mount fixation
Early discussion on design with groupe projet (Sep ? Oct ?):Karim, JB, Franck: list of needed specifications – Heike Anders, Frederic tolerance on changes on PSF shapes for image substraction
Choice of the telescope size to be done according to telescope mount at the end of October and realisation
Work packages and early schedule
WP2 - Telescope and Camera software
-A Klotz-A Blazit-C Combier-K Agabi – organizing discussion-A le Van Suu-C Carol
Study of telescope guiding and tracking software and camera reading.Computer interfaces/redundancy/security
Meeting between LUAN and OHP teams soon (Sep ? Oct ?)to fix which software can be reused/adapted for A STEP
Work packages and early schedule
WP-3 Camera thermal enclosure design and tests/ filter and field corrections – > subcategory of WP-1
-A Blazit-JB Daban-F Jeanneaux -Y Fantei-F Fressin-K Agabi
Design of enclosure for camera / wynne corrector /filter or dichroïc, fixation on telesope tube
Work packages and early schedule
WP-4 Optical combination – Camera tests
A Blazit VP AssusF Fressin
A Erikson + F Pont in reaction mode – F Valbousquet real input
Zeemax simulations of the field – PSF shapes on every part of the field.
Work packages and early schedule
WP-5 - 2007 campaign tests
-D Mekarnia V-FX Schmider-E Fossat-K Agabi + F Valbousquet V + V : optical experiments – small mirrors including tulip mirror in zerodur September
Logistic needs for A STEP : to be defined for September 11
Checking the availability of new “optical experiments” site at Dome C, or preparing A STEP for Concordiastro site
Testing specific treatment on zerodur mirror at different places – behaviour of frost - optical behaviour of mirrors Foucault test
What do we send at Dome C in 2 months ?
Additional tests on Astro 1200 ? Different payloads ?
Work packages and early schedule
WP-6 Dome C specific problems: open questions that require study groups
- Karim V
How to do flat fields at Dome C ? Mandatory for good photometric precision – frequency needed ?
Necessity of a protection for bad condition days/summer ? Availability of “flower domes” ?
Electrical problems/overcharges – all electronic control
Duplication ? Of camera ? Encoder (mount) Control computer
Who will run A STEP in 2007 ?
Work packages and early schedule
WP–7 Data pipeline – Light curves extraction and analysis
-H Rauer V-A Erikson-F Pont-T Guillot-FX Scmider-F Fressin
What is reused from BEST data pipeline ? Design of the alarm mode and photometric control. What has to be fixed before A STEP departure for Dome C?
Need to drive A STEP on sky in France before computing the real pipeline – define specific alarm mode too –
Proposal: input from Heike – development as a team approach – raise fundings – archiving A STEP data – Proposal fro A STEP/BEST 2 comparisons/summer/winter network - internal DLR funding application by spring 2007
Work packages and early schedule
WP-8 Target fields selection – survey strategy
-T Guillot-FX Schmider-F Pont-H Rauer-C Moutou-M Deleuil-S Aigrain-F Fressin
Need for preliminary observations – or data base on target fields ? Specific needs for seismology targets ?
Target field selection from Holger thesis
Starting discussion with Marseille field selectors for CoRoT
Work packages and early schedule
WP-9 Data analysis – Follow up of candidates
-T Guillot-FX Schmider-F Pont-H Rauer -A Erikson-F Bouchy-F Fressin-S Aigrain-C Moutou
What is necessary to fix soon ?
Work packages and early schedule
WP-10 Future prospects – the best design for global transit search
-T Guillot-H Rauer -Y Fantei : internet site soon-A Erikson-F Pont-FX Scmider-F Fressin
comparative simulations with CoRoTlux – experience from BEST-2 – A STEP connection and CoRoT preliminary results
Necessity to propose different designs soon for visibility and outreach ?
Developping webpage / internal and public ? Yan Fantei
Observatoire de la Côte d'Azur (Laboratoires Cassiopée et Gemini):
Tristan Guillot (PI)
Scientific preparation, operation supervision, preparation of modelling tools, analysis of the results and scientific interpretation
Francois Fressin (IS)Scientific and technical preparation, modelling tools, analysis of the results and scientific interpretation
Alain BlazitResponsible of the camera team; Developpement of test and acquisition tools.
Jean GayFollow-up of the telescope conception; Technical preparation, optical properties modelling
Yves Rabbia Telescope environment, follow-up of the telescope conception
Jean-Pierre Rivet Telescope environment, flat fielding system
Dominique Albanese Camera control softwares & camera testing expertise
Laboratoire Universitaire d'Astrophysique de Nice:
François-Xavier SchmiderScientific and technical preparation (telescope), Dome C logistics, analysis of the results and scientific interpretation
Karim Agabi (PM)Technical preparation, Dome C logistics, telescope design and telescope control systems
Jean-Batiste DabanTechnical preparation, Dome C logistics, telescope design and telescope control systems
Eric FossatDome C logistics, analysis of the results and scientific interpretation
Lyu Abe Quality control, tests and installation
Cécile Combier Telescope and camera control softwares
François Jeanneaux Mechanical study of the camera environment
Yan Fantei Temperature regulation system, camera control system
Observatoire Astrophysique de Marseille Provence (LAM & OHP):
Claire MoutouScientific preparation, follow-up of transit candidates, photometric reduction
Magali Deleuil Scientific preparation, follow-up of transit candidates
Marc FerrariConsulting on optical properties of the telescopes, tests and optical simulations
François Bouchy Scientific preparation, follow-up of transit candidates
Antoine Llebaria Image processing, stellar photometry
Michel BoerResponsible for providing a telescope control system based on TAROT, scientific interpretation
Hervé Le Corroler Scientific interpretation
Alain Klotz Telescope and camera control software, scientific interpretation
Auguste Le van Suu Computer interfaces, telescope control system
Jérome Eysseric System engineer
Claudine Carol Computer engineer
Observatoire de Genève:
Frédéric PontScientific preparation, specifications, analysis of the results, follow-up of transit candidates, scientific interpretation
Deutsches zentrum für Luft und Raumfart:
Anders EriksonAdaptation of the data reduction pipeline; Experience with running the transit surveys BEST (OHP) and BEST II (La Silla)
Heike RauerScientific preparation, specifications, analysis of the results, comparison of BEST II / A STEP data
THEA STEP TEAM
Schedule of A STEP
top related