Is there a place online where one can download papers that have appeared in the Asterisque if "your institution subscribes"? I am especially interested in back issues: Asterisque series published a lot of interesting papers which I would like to read, yet it seems to me the only way to access them is to take a trip to your library and pray that it has them in print. This being ridiculous in 21st century, I wonder if there is a place online with *.pdf versions of the issues...
I requested Mme Hélène Falavard of Numdam some years ago to digitise the old volumes of Astérisque. Here is her reply (12/12/2005):
la collection Astérisque n'est malheureusement pas prévue dans notre programme de numérisation car la Société mathématique de France n'a pour l'instant pas donné son accord. Peut-être cela changera-t'il un jour ......
Update 2/6/2017 The whole Astérisque collection is currently being digitised and will appear before the end of this year on the Numdam site. --- European mathematical society
The first 180 volumes of Astérisque are now electronically available for free
The issue of providing online access to Asterisque is a difficult one. The SMF offers electronic versions of its other journals, and the subscription rates for these has apparently significantly dropped. Asterisque is now the most profitable publication of the SMF and there is a lot of reluctance to join the 21st century and jeopardize this profitability. I agree with Obelisque that the best solution is to buy the old issues, but the ones that are most in demand are also out of print. All of these topics are currently being discussed (electronic versions, reprinting the back issues, ...). It is also not impossible that the Bourbaki seminars will soon be available online, maybe with a five year buffer, as the contract beween Bourbaki and the SMF gives total freedom to Bourbaki.
EDIT : of course, one reason why the standard model for journals does not quite apply to Asterisque is because it's part journal, part book series...
One can also buy the volumes; old issues are pretty cheap (when not out of print).
In general the answer is 'no'. There seems to be no offer of the SMF, which produces Asterisque, to buy electronic versions; see the SMF catlogue offering only printed versions.
The Asterisque collection has been partially digitised and is now online for subscribers starting from year 2015. See the website of the SMF, which says:
Asterisk : from the year 2015 (and volume 367-368), the series is accessible on the SMF server as they are released for subscribed members. A volume may be presented component by component (eg article by article for the annual Bourbaki volume). Previous volumes (1-366, from 1973 to 2014) are offered for sale and are not available online.
The Asterisk series is being digitized by the Mathdoc Cell within its Mersenne program: an online publication is planned by 2018. Other online releases are being studied, according to modalities to be specified.