New dates of the conference August 31, September 1 and 2, 2022

Institut d'Astrophysique de paris

The dawn of astrometric microlensing, from cold planets to black-holes

25th international microlensing conference

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    1. Presentation of the conference

    - Scientific rationale

    Gravitational microlensing has been used for decades as a tool to probe the content of our galaxy, explore its structure and properties. For example, microlensing surveys have enabled the study of the cold exoplanet populations orbiting at the birthplace of giant planets all the way to the Galactic center, thus providing insights on the Galactic distribution of exoplanets and strong constraints for the models of planet formation and evolution. Microlensing has also become a source of constraints for models of the Milky Way, the initial mass function, and for the existence of primordial black holes. Yet the power of microlensing probes has not yet been fully realized and has the potential to expand our knowledge of the frequency and mass-function of exoplanets, brown dwarfs, and compact objects, including black holes and white dwarfs in the Milky Way. New facilities and techniques are unlocking this potential, including the photometric and astrometric capabilities of HST, Gaia, ground-based adaptive optics systems, interferometry, JWST, Rubin Observatory, and the Nancy Grace Roman Space Telescope.

    This 3-day conference will bring together members of the community to discuss all aspects related to microlensing, including (but not limited to):

    • Astrometric microlensing
    • Interferometric microlensing
    • Detection of free-floating planets, exoplanets, brown dwarfs, stars and binaries, compact objects, including white dwarfs and black holes
    • Cold planet demographics (observational constraints and theory)
    • Stellar populations and their properties in the Milky Way (and other galaxies)
    • Search for electromagnetic signatures of gravitational-wave sources through microlensing.
    • Synergies between ground-based facilities and/or space missions (Gaia, Roman, Euclid, Rubin, ELTs, etc.)
    • Data mining, numerical tools and technique

    Our intention is to hold the conference in-person at the Institut d’Astrophysique de Paris (France). However, the conference will be broadcast live and virtual presentations will be accepted.

     Should the safety restrictions due to the COVID-19 prevent us from meeting in Paris, the conference will become fully virtual.

    - Scientific Organizing Committee

    Clément Ranc, co-chair (IAP, Sorbonne University)

    Jessica Lu, co-chair (UC Berkeley)

    David Bennett (NASA Goddard)Aparna Bhattacharya (NASA Goddard)
    Sun-Ju Chung (Korea Astronomy and Space Science Institute)
    Somayeh Khakpash (University of Delaware)
    Przemek Mróz (Caltech)
    Matthew Penny (Louisiana State University)
    Takahiro Sumi (University of Osaka)
    Andrzej Udalski (University of Warsaw)
    Joachim Wambsganss (ARI/ZAH, University of Heidelberg)

    - Local Organizing Committee (provision list of confirmed members)

    Jean-Philippe Beaulieu (IAP)

    - Acknowledgements

    We acknowledge the financial support of the following agencies, institutes and national initiatives:
    ANR COLD-WORLDS (ANR-18-CE31-0002

    2. Registration

    - Registration fees:

    We will provide information about payment of the registration fees early Nov. We will ask payment by January 5 for your chosen option, in-person or virtual participation.

    The conference fees will also enable financial support for a few students who would not be able to attend the conference otherwise.


    Registration (in-person): 300€

    The registration fee includes the coffee breaks and light breakfast during the conference. 

    For in-person attendees, the conference fees include the conference dinner. More information about the conference dinner is coming soon

    Registration (virtual): 150€

    For a virtual attendance, the registration fees includes the set up required to film the talks and to broadcast them live.

    - Registration form:

      Full information about the Schengen VISA (if you need one, how to apply etc.) can be found here
      To start a VISA application, please visit:

      Please remember to submit your abstract by November 1rst, 2021.

      If you would like to be considered for a talk or poster, please provide

      The size of your file should not exceed 10 Mb. Only files jpg, jpeg, png, gif, pdf, doc, docx, ppt, pptx, odt, txt are accepted.

      3. Invited speakers

      • Julie E. McEnery (NASA Goddard Space Flight Center)
      • Benjamin Fulton (Cahill Center for Astronomy & Astrophysics, Caltech / IPAC-NASA Exoplanet Science Institute)
      • Greg Olmchenck (NASA Goddard Space Flight Center)
      • Knut Olsen (NSF’s NOIRLab)
      • Astrid Lamberts (Observatoire de la Côte d’Azur, France)
      • … More coming soon 🙂

      4. Important dates

      June 1rst, 2022

      Confirmation of in-person or online participation

      June 1rst, 2022

      From June 15th, 2022

      early registration and abstract submission deadline.

      Step 1: Administrative pre-registration

      • a –  Follow the link:
      • b – Fill in the form and choose your registration fee:
        – 300 Euro for in-person attendance;
        – 150 Euro for remote attendance;
        – 0 Euro if you have been invited by the SOC or selected to receive financial support.
      • c –  Click « Next. »

      You should receive a confirmation email from «« 

      The administration will validate your pre-registration within 48 hours.


      Step 2: Payment of registration fees

      • a – Once validated, you will receive a 2nd email with a link to make your payment.
      • b  – Click on the link and proceed on to make payment online. Please follow this link to complete the registration, even if your registration fees have been waived by the SOC.
      From June 15th, 2022

      July 20, 2022

      Deadline for payment

      Thank you to make sure that all payments are made before July 20th, 2022

      July 20, 2022

      August 31, September 1 and 2, 2022

      25th International Conference on Microlensing

      At the Institut d’Astrophysique de Paris, France. 

      August 31, September 1 and 2, 2022

      5. Venue and local information

       How to get to the venue? 

      By metro or bus

      Metro stations: Saint-Jacques (line 6) or Denfert-Rochereau (line 4 and 6) RER B (express lines): Denfert-Rochereau station Bus: 38, 68, 88 (Denfert-Rochereau or Arago stop)

      By train

      - From Gare du Nord train station
      Take RER B heading South (to Denfert-Rochereau via Paris) or metro line 4 heading towards Porte d'Orléans, and get off at Denfert-Rochereau station. Travel Time: 30 mins.

      - From Gare de Lyon train station
      Take metro line 14, heading towards Olympiades. Switch at Bercy station and take metro line 6, heading towards Charles de Gaulle-Etoile. Get off at Saint-Jacques station. Travel time: 20 mins.

      -From Gare de l’Est train station
      Take metro line 4 towards Mairie de Montrouge, and get off at Denfert-Rochereau station. Travel Time: 30 mins.

      From Paris Airport

      - From Roissy Charles de Gaulle airport
      Take RER B heading South (Denfert-Rochereau via Paris). Travel time: 1 hour. You can also take a shuttle Le Bus Direct Paris Aéroport Line 4 to Gare-Montparnasse. Then take metro line 4 towards Mairie de Montrouge, and get off at Denfert-Rochereau station. Travel time: 1 hour.

      - From Orly airport
      Take the automatic metro Orlyval up to Antony station, then take RER B heading to Gare du Nord up to Denfert-Rochereau. Travel time: 40 mins. You can also take the Orlybus to Denfert-Rochereau. Travel time: 35 mins.

      A selection of hotels

      Category 4

        232, boulevard Raspail – 75014 Paris
        4, boulevard Raspail – 75007 Paris
        17, boulevard Saint-Jacques – 75014 Paris

      Category 3

        57, Boulevard Saint-Marcel – 75013 Paris
        124, rue de Rennes – 75006 Paris
        4, Avenue René Coty – 75014 Paris
        6, rue Jolivet – 75014 Paris
        8 bis avenue de la Soeur Rosalie – 75013 Paris
        155, boulevard du Montparnasse – 75014 Paris
        107, boulevard Saint-Michel – 75005 Paris
        203, boulevard Raspail – 75014 Paris
        212, boulevard Raspail – 75074 Paris
        20, rue du Sommerard – 75005 Paris

      Category 2

        1, avenue du Général Leclerc – 75014 Paris
        22, rue Cels – 75014 Paris
        22, rue Daguerre – 75014 Paris
        74, rue du Moulin Vert – 75014 Paris
        5 rue Véronèse – 75013 Paris
        22 rue Boulard – 75014 Paris

      Restaurants for lunch break


      • [A] – Le Comptoir De Milana (6-10 euros)
        24 rue Daguerre, 75014 Paris [open every day except on Monday]
      • [B] – Moisan (6-10 euros)
        4 Avenue du Général Leclerc, 75014 Paris [open every day except on Monday]
      • [C] – Paul (6-10 euros)
        7 place Denfert Rochereau, 75014 Paris
      • [D] – Thevenin (6-10 euros)
        14 rue Daguerre, 75014 Paris [open every day except on Wednesday]


      • [E] – La Belle ronde (10 euros)
        19 rue Daguerre, 75014 Paris
      • [F] – L’Ile O’crêpes (15-20 euros)
        6 rue René Coty, 75014 Paris


      • [G] – Café Daguerre (20-25 euros)
        4 avenue du Général Leclerc, 75014 Paris
      • [H] – Café du Rendez-vous (20-25 euros)
        2 avenue du Général Leclerc, 75014 Paris
      • [I] – Café Oz Denfert-Rochereau (15-20 euros)
        3 place Denfert Rochereau, 75014 Paris
      • [J] – Le Lakanal (15-20 euros)
        2 avenue René Coty, 75014 Paris
      • [K] – Maison Péret (20-25 euros)
        6 rue Daguerre, 75014 Paris
      • [L] – Le Petit Daguerre (20-25 euros)
        22 rue Daguerre, 75014 Paris

      Other restaurants

      • [M] – McDonald’s (American, 7-10 euros)
        5 avenue du Général Leclerc, 75014 Paris
      • [N] – Swann et Vincent (Italian, 20-25 euros)
        22 place Denfert Rochereau, 75014 Paris
      • [O] – Ayko Sushi (Japanese, 10-15 euros)
        11 place Denfert Rochereau, 75014 Paris
      • [P] – Baladna (Libanese, 15-20 euros)
        26 place Denfert Rochereau, 75014 Paris
      • [Q] – Indiana café (Mexican, 20-25 euros)
        1bis avenue du Général Leclerc, 75014 Paris

      6. Agenda

      7. Code of conduct


      The conference organizers are committed to making this meeting productive and enjoyable for everyone, regardless of gender, sexual orientation, disability, physical appearance, body size, race, nationality or religion. Harassment of participants in any form will not be tolerated.

      To participate at the 25th International Microlensing Conference, please follow these guidelines:

      • Behave professionally.

      Harassment and sexist, racist, or exclusionary comments or jokes are not appropriate. Harassment includes sustained disruption of talks or other events, inappropriate physical contact, sexual attention or innuendo, deliberate intimidation, stalking, and photography or recording of an individual without consent. It also includes offensive comments related to gender, sexual orientation, disability, physical appearance, body size, race or religion.

      • All communication should be appropriate for a professional audience including people of many different backgrounds. Sexual language and imagery is not appropriate.

      • Be respectful and do not insult or put down other attendees or facilitators of the event. Critique ideas not people.

      • If participants wish to share photos or contents of talks/slides of any attendee or speaker on social media, we ask that they first get permission.

      Participants asked to stop any inappropriate behaviour are expected to comply immediately. Attendees violating these rules may be asked to leave the event at the sole discretion of the organizers without a refund of any charge.

      This code of conduct is based on the “London Code of Conduct“, as originally designed for the conference “Accurate Astrophysics. Correct Cosmology”, held in London in July 2015. The London Code of Conduct was adapted with permission by Andrew Pontzen and Hiranya Peiris from a document by Software Carpentry (, which itself derives from original Creative Commons documents by PyCon and Geek Feminism. It is released under a CC-Zero licence for reuse. To help track people’s improvements and best practice, please retain this acknowledgement, and log your re-use or modification of this policy at

      Any participant who wishes to report a violation of this policy is invited to contact, in confidence, to Clément Ranc, Jean-Philippe Beaulieu, or Jessica Lu.

      8. List of participants

      9. Contacts

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      If you have any questions or need further information, please feel free to contact us

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