Improving Rubin/LSST photometry with atmospheric extinction measurements. Impact on cosmological probes

Submission Information
Publish Date: 
Wednesday, April 7, 2021
Archive Date: 
Wednesday, May 5, 2021
Job Summary
Job Category: 
Post-doctoral Positions and Fellowships
Institution Classification/Type: 
Research Laboratory
Laboratoire Irène Joliot-Curie
Department Name: 
Street Line 1: 
Centre Scientifique d’Orsay. Rue Ampère
Street Line 2: 
Bâtiment 200 – BP 34
Orsay cedex
Job Announcement Text: 

Scientific context

The post-doc will participate in the start-up of the LSST survey at the Vera Rubin Observatory. This start-up includes a commissioning phase of less than a year, which will be followed by a year of observation before the first data release.


The Dark Energy Study Group (GREEN = Groupe d’Étude de l’Énergie Noire) of IJCLab is composed of 8 researchers and teacher-researchers experts in astronomy, astrophysics and cosmology.

Web site:

Technical and scientific missions

Atmospheric absorption corrections during LSST main telescope observations will rely on the measurement of spectrophotometric standard spectra with a dedicated auxiliary telescope (Auxtel). Our group has equipped this telescope with a holographic disperser, in order to reach a final photometric precision of a few millimagnitudes. This precision is a key element that will allow a better estimation of the photometric redshifts, also one of the fields of activity of the group.

The postdoc will draw on our expertise in photometry and atmospheric models for the analysis and scientific exploitation of the auxiliary telescope data to develop correction procedures for the main telescope.

The postdoc will also be involved, depending on his/her background, in the scientific work of the GREEN host group of IJCLab, which deals with dark energy and dark matter issues.

Profile of the candidate, expected skills

The candidate should have a PhD in astronomy/astrophysics or fundamental physics with a cosmological component. He/she should have good computer skills, in particular in data analysis. Experience in observing with large telescopes will be appreciated.

The candidate should be fluent in written and spoken English and/or French, the two working languages of the host group.

Duration of the position, place of assignment

The position, assigned to the Laboratoire des deux infinis Irène Joliot-Curie (IJCLab-CNRS, Orsay, France), is to be filled for 2 consecutive years. The starting date is September 2021, but applications to start up to two months later will be considered.


The selected candidate will be required to travel for technical and observational missions and to participate in meetings, workshops and conferences, both nationally and internationally.

Pay Compensation
Salary Min: 
$37332.00 (USD)
Salary Max: 
$43044.00 (USD)
Included Benefits: 

This amount includes social charges, and in particular the general health insurance.

Application Deadline: 
Saturday, May 15, 2021
Selection Deadline: 
Sunday, May 30, 2021
Current Status of Position: 
Accepting Applicants
Apply to Job
Attention To: 
Marc Moniez
Inquiries About Job
Attention To: 
Marc Moniez
Rubin/LSST postdoc at IJCLab