More Than 40 Years of Contacts with Boudine Philippe Lemaire 21 October 2005

(Service d’Aéronomie, Verrières le Buisson) Jean-Pierre preceded me in SA by few months We have shared (with Roger Bonnet and few others) the same office during at least one year Jean-Pierre was already working on absorption cell (…) This was the period of Sahara rocket launches

(Service d’Aéronomie, Verrières le Buisson) We shared (with D. Samain) the same office Jean-Pierre was preparing ‘Dragon’ rocket to be launched in the Landes with a solar Helium absorption cell. I was making balloon launches with a solar Magnesium II spectrograph. We co-operated: Lemaire,P., Delaboudinière,J.P., (1968) Préparation au VIème plan - Proposition de satellite pour l'étude de la chromosphère solaire, Rapport interne du Service d'Aeronomie n°167 We competed on D2B (CNES): Charra,J., Huriet,H., Lemaire,P., (1968) Satellite D2B - Proposition d'expérience (Lα, Mg II, Ca II) Delaboudinière, J-P, (?) (1968) Satellite D2B – ( A, grazing incidence spectrometer ?) selected

(LPSP, Verrières le Buisson) We shared (with D. Samain) the same office Jean-Pierre has several unsuccessful rocket launches in the Landes We were preparing a bi-face rocket experiment on a Veronique: One side: solar Helium absorption cell (Boudine) Other side: solar absolute Mg II lines calibration (D. Sacotte, P. Lemaire et al) OSO8/NASA proposal selected : Lemaire,P., Vidal-Madjar,A., Vial,J.C., Bonnet,R.M., (1969) Study of the chromosphere fine structure by means of simultaneous high resolution observations of the profile of Lyman alpha, Lyman beta, MgII and CaII H and K lines

(LPSP, Verrières le Buisson) 1972, the Veronique rocket launch from Kourou (Guyana) failed (rocket cap not ejected). Then new instrumentations are built for a successful launch from White Sand in 1975 Use of the LURE ACO synchrotron ring to calibrate D2B optical components 1975, OSO8 (June) and D2B (December) are put in orbit D2B works one year and OSO8 three years and three months. D2B solar data (after a sophisticated treatment) are available as images at several wavelengths in Solar Geophysical Data

(LPSP, Verrières le Buisson) Jean-Pierre was involved in several proposals to measure the absolute flux of the Sun (DISCO?,..) and established contacts with several labs in URSS. I was involved in several proposals (CNES, NASA), in the development RASOLBA balloon gondola and instrumentation and in OSO8 data analysis

(LPSP, Verrières le Buisson) 1982, GRIST studies : Malinovsky-Arduini,M., Delaboudinière,J.P., Lemaire,P., Cougrand,B., Soufflot,A., (1982) Design and interface definition of a model focal plane instrument for GRIST: a normal incidence spectrometer 1982, proposal for a SOHO mission (ESA) Arduini-Malinovsky,M., Delaboudinière,J.P., Lemaire,P.,(LPSP), Huber,M.,(ETH-Zurich), Patchett,B.,(RAL-Chilton), Van Beek,H. (SRL-Utrecht), (1982), Solar High Resolution Observatory - SOHO - Investigation of the Dynamics and of the Mass Loss of the Outer Solar Atmosphere Other proposal (Columbus/ESA) Foing, B.H., Delaboudinière, J.-P., Gabriel, A.H., Lemaire, P., Patchett, B., Bromage, G., Bruner, M.E., Tarbell, T., Schmitt, J., Serio, S., (1985), Multiband Ultraviolet Subarcsec Imaging Cameras (MUSIC) 1983, Jean-Pierre is member of the LURE SUPERACO beam studies to obtain a calibration output for UV Astrophysics

(LPSP/IAS, Verrières le Buisson) , we shared the same office (Study and realization of a calibration station connected to SUPERACO synchrotron ring) IPHIR (cooperation with URSS) J-F Hochedez thesis on Characterization of back illuminated thin CCD (CNES-THOMPSON fellowship) EIT and SUMER are selected to be on-board of SOHO Delaboudinière, J.P., Gabriel, A.H., Artzner, GE., Michels, D., Dere, K., Howard, R., Catura, R., Stern, R., Lemen, J., Neupert, W., Cugnon, P., Koeckelenbergh, A., Van Dessel, E.L., Jamar, C., Maucherat, A., Chauvineau,J.P., Marioge, J.P.(1987) ‘EIT’ – Extreme-ultraviolet Imaging Telescope Wilhelm,K., Lemaire,P., Curdt,W., Gabriel,A.H., Huber,M.C.E., Jordan,S.D., Marsch,E., Poland,A.I., Richter,A.K., Thomas,R.J., Timothy,J.G., Vial,J.-C., + 30 Associated Scientists, (1987), Solar Ultraviolet Measurement of Emitted Radiations - SUMER

(IAS, Orsay) 1995, SOHO launch. EIT provides several full (and partial) solar images per day in 4 wavelengths; SUMER uses them to define the solar context Other common proposal (rejected): Hassler, D.M., Thompson, B.J., DeForest, C., Slater, D.C., Leka, K.D., Kucera, T.A., Judge, P.G., Harvey, K.L., Ayres, T.R., Hudson, H.S., Woods, T.N., Gurman, J.B., Longcope, D.W., Warren, H.P., Berghmans, D., Clette, F., Curdt, W., Delaboudinière, J.-P., Defise, J.-M., Hochedez, J.F., Lemaire, P., Mason, H.E., Rochus, P., Schuehle, U., Verwichte, E., Wilhelm, K., (2000) ESSEX (EUV Solar Spectroscopic Explorer)

Conclusion I have probably missed some important events We have survived 4 solar cycles of cooperation and competition One meeting point was the visit to the library, every day after lunch, to look at the new scientific magazines on the display unit I hope to continue to keep contact with Boudine during many years in the future