Day 28

Wednesday.  Gave a talk, I should have rewritten it to suit the topic of the conference.


1106.5052
Are priors responsible for cosmology favoring additional neutrino species?
Gonzalez-Morales, Poltis, Sherwin, Verde


There are (weak) cosmological and and flavor oscillation experiments (MiniBooNE and LSND) evidence for low-mass sterile neutrinos.  Once the prior-dependence is removed, the latest cosmological data show no evidence for deviations from the standard number of neutrino species.


Preprint
Photometric redshift requirements for lens galaxies in galaxy-galaxy lensing analysis
Nakajima, Mandelbaum, Cohn, Seljak, Cool


* writing down summary of the conclusion section to help me read, otherwise I'll fall asleep.


- We used SDSS DR8 5-band photo-z with ZEBRA.  Choose minimal scatter, correct for bias.

- Test the calibration set and check for exceptional observing conditions.  Used 6 subsamples.

- Photo-z bias/scatter and the derived quantities measured, mostly lens photoz.  Accuracy of 2% for a known lens redshift.  Additional blue or faint objects.  

- Biases in the "stacking quantities" that depend on redshift.  k-correction enabled due to SED.

- Specific cautions for calibration fields: full depth of photometric survey, average out LSS, survey conditions.  Scatter determines the binning width of stacking.