Events
IPAC organizes and hosts a number of meetings and conferences.
IPAC hosts seminars every Wednesday from 12-1pm in IPAC's Large Conference Room (102) except where noted. Directions can be found on the visitor information page. Pizza and soda are available for purchase at a modest fee. Some weeks, the Time Domain Forum talk (which is not a lunch talk) is held on Thursday afternoons at 2:30 pm.
To receive seminar notification emails, you may sign up here. If you are interested in presenting a talk or seminar, please contact Peter Capak (Extragalactic), or Stephen Kane (Galactic/Solar System/Exoplanets). To present at the Time Domain Forum, contact Luisa Rebull.
Here is a partial list of astronomy-related talks in Pasadena:
- Caltech Astronomy Tea Talk (Mondays, 4pm)
- Caltech DPS Division Seminar (Mondays, 4pm)
- IR/sub-mm/mm Sack lunch series (Tuesdays, 12:15pm)
- Carnegie Colloquia series (Tuesdays, 4pm)
- Caltech Astronomy Colloquia (Wednesdays, 4pm)
- Caltech Physics Research Conference (Thursdays, 4pm)
- Carnegie Lunch Talk Series (Fridays, 12:15pm)
Special Note: For more astronomy related talks around Pasadena, check the following list maintained by IPAC scientist Solange Ramirez.
Wednesday, May 08, 2013
The Dark Energy Survey (DES) has recently completed its science verification phase and will start regular survey operations in Oct 2013, observing 2500 square degrees (23.5 mag i-band) by March 2014. This high quality data set will be extended to 5000 square degrees (24 mag i-band) over the next 4 years and it poses new challenges for the precise modelling of observables of the Universe's Large-Scale Structure (LSS), and its astrophysical and observational systematics. The tightest constraints on cosmology and dark energy models will be obtained from a joint analysis of all probes (e.g., weak lensing, galaxy clustering, and magnification) that can be extracted from the DES data set. Such joint analyses face several difficulties: First, the cosmological information is highly correlated, which requires a joint likelihood including all cross correlations between the individual probes. Second, even more problematic are the correlations of various systematic effects originating from astrophysics and the measurements themselves. In this talk I will outline a coherent framework for a joint likelihood analysis of LSS observables, specifically addressing the problems of correctly modelling the non-linear evolution of the density field, the impact of baryonic physics and the importance of precise modelling of cross-correlation terms in the covariance. I will summarize plans to apply this framework to DES data and outline necessary improvements for future data sets from LSST, Euclid, and WFIRST.
