Документ взят из кэша поисковой машины. Адрес оригинального документа : http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr15.pdf Дата изменения: Wed Apr 15 23:34:10 2015 Дата индексирования: Sun Apr 10 11:57:56 2016 Кодировка: Поисковые слова: arp 220

Astro 193 : 2015 Apr 15
· · · · · ·

Projects Haiku Q&A Some examples of likelihoods HW 11 (Periodograms) HW 12 (Upper Limits) Hw 10 (discussion)


Class Logistics
·

What we expect from the Projects
·

use data; apply techniques we have discussed in class (OK to go beyond); infer or compute an astronomically/astrophysically interesting quantity 5-slide, 10-minute presentation on May 4 and 6 from 2pm-4pm, 15 min each
· ·
th th

·

sequence TBD, will be announced Friday May 1

st

introduce the problem; describe the data; describe the analysis; show results; draw conclusions.

·

CHASC AstroStatistics Collaboration
· · ·

Mailing list : http://hea-www.harvard.edu/AstroStat/mailinglists.html Present projects to statisticians Suggest items to add to Stat jargon dictionary : http://hea-www.harvard.edu/ AstroStat/statjargon.html

·

Review class on Apr 15. Bring your questions.
·

ALSO: Give a one minute description of your project to the class. No slides.


Homework 10
· ·

Risk minimization: bias vs variance tradeoff, GCV in limits Binning/smoothing is always ambiguous. GCV is affected by method, choice of kernel, choice of Risk statistic Light curves from photon arrival time data
· · ·

·

GCV minimized at h=102 s locfit rectangle kernel GCV minimized at h=786 s locfit tricubic kernel GCV minimized at h=1141 s

·

Smooth curve through pairwise data
· ·

locfit tricubic kernel GCV minimized at h30 locfit rectangle kernel GCV minimized at h18