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181. http://hea-www.harvard.edu/AstroStat/astro193/HW_8+9_dueApr8.pdf
Homework Problems 8 and 9 Note: The Kernel Density estimation problem that was mentioned in class has been postponed. HW 8 (Bootstrap): Use bootstrap techniques to compute the mean and variance of the fit parameters for data used in HW 6 (MCMC). HW 9 (Fourier Transforms): Compute the FT of the functions f(x) = exp(-|x|/) f(x) = exp(-axІ)
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/HW_8+9_dueApr8.pdf -- 39.5 Кб -- 01.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/HW_8+9_dueApr8.pdf -- 39.5 Кб -- 01.04.2015
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182. http://hea-www.harvard.edu/AstroStat/astro193/HW_feb4.pdf
... 3. g = ln(a)-ln(b) Homework 3.2 : G21.5 Tsujimoto et al. ... 93­3. 01­3. 98­3. 05­3. 11­3. 95­3. 08­3. 05­3. 04) 12) 09) 16) 22) 06) 20) 09) 1. 1. 1. 1. 1. 1. 1. 1. 83 85 82 84 88 81 88 84 2.99 2.99 3.07 (3.03­3.11) 3.18 (3.14­3.22) 3.07 (3.03­3.11) 2.99 2. 2. 2. 3. 2. 3. 88­3. 83­2. 98­3. 08­3. 87­2. 05­3. 07) 98) 13) 25) 99) 16) 2.09 2.05 1.91 1.92 1.90 2.28 1. 1. 1. 1. 1. 1. 77 77 90 93 77 91 2.90 (2.87­2.94) 2.94 (2.91­2.98) 2.74 (2.72­2.77) 2.99 (2.98­3.00) 2.99 1.78 1.84 1.76 ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/HW_feb4.pdf -- 99.9 Кб -- 04.02.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/HW_feb4.pdf -- 99.9 Кб -- 04.02.2015
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183. http://hea-www.harvard.edu/AstroStat/astro193/HW_jan28.txt
Astro 193 Homework 2 28-jan-2015 Due Mon Feb 2, 2015 The goal is to measure the count rates [counts/second] of individual sources in an X-ray dataset of the Orion Nebula Cluster. ... For each selected source, define a region in which to collect source counts. ... For each selected source, define a region in which to collect background counts. ... The background counts scaled to under the source is (area_source/area_background)*(measured_background) Report the source counts and the errors. ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/HW_jan28.txt -- 2.8 Кб -- 28.01.2015
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/HW_jan28.txt -- 2.8 Кб -- 28.01.2015
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184. http://hea-www.harvard.edu/AstroStat/astro193/Handout_Jan26.pdf
... 26 Introduction W Jan.28 Data I M Feb. 2 Data II W Feb. ... 9 Basics of Model Fitting II W Feb 11 Probability Theory I M Feb 16 President's Day holiday no class W Feb 18 Probability Theory II M Feb 23 Parameter Estimation I W Feb 25 Parameter Estimation II M Mar 2 MCMC I W Mar 4 MCMC II M Mar 9 Model Selection I W Mar 11 Model Selection II M Mar 16 Spring break W Mar 18 Spring break M Mar 23 Nonparametric tests I W Mar 25 Nonparametric tests II M ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Handout_Jan26.pdf -- 162.7 Кб -- 26.01.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Handout_Jan26.pdf -- 162.7 Кб -- 26.01.2015
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185. http://hea-www.harvard.edu/AstroStat/astro193/Homework13_dueApr29.pdf
Homework 13 : Bayesian Blocks Due Apr 29 · For the time-tagged data of RT Cru from Homework 10, construct a Bayesian Blocks representation Comment on the difference between the results from HW 10 and the BB representation. Identify the biggest limiting factor in the usefulness of the first version (Scargle 1998) Identify the biggest limiting factor in the usefulness of the current version (Scargle+ 2013) · · ·
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Homework13_dueApr29.pdf -- 12.7 Кб -- 22.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Homework13_dueApr29.pdf -- 12.7 Кб -- 22.04.2015
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186. http://hea-www.harvard.edu/AstroStat/astro193/Lee+2011_apj_731_2_126.pdf
... Printed in the U.S.A. ACCOUNTING FOR CALIBRATION UNCERTAINTIES IN X-RAY ANALYSIS : EFFECTIVE AREAS IN SPECTRAL FITTING Hyunsook Lee1 , Vinay L. Kashyap1 , David A. van Dyk2 , Alanna Connors3 , Jeremy J. Drake1 , Rima Izem4 ... This method is implemented using recently codified Chandra effective area uncertainties for low-resolution spectral analysis and is verified using both simulated and actual Chandra data. ... Effect of calibration uncertainty on fitted parameters and error bars. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Lee+2011_apj_731_2_126.pdf -- 2913.9 Кб -- 28.01.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/etc/calerr_Lee+2011apj731p126.pdf -- 2913.9 Кб -- 28.01.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Lee+2011_apj_731_2_126.pdf -- 2913.9 Кб -- 28.01.2015
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187. http://hea-www.harvard.edu/AstroStat/astro193/Loader_locfit_tutorial.pdf
... Locfit is a software package performing local regression, likelihood and related smoothing procedures. ... Our example uses the ethanol dataset, studied extensively in Cleveland (1993), and fits a local quadratic model: > fit.et <- locfit(NOx~E, data=ethanol, + alpha=0.5) > plot(fit.et, get.data = T) Three arguments are given to the locfit() funcLocal regression was applied in a variety of fields in tion. ... Figure 1 shows the (Cleveland and Devlin 1988). plot of the fit. ... Visualizing Data. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Loader_locfit_tutorial.pdf -- 158.4 Кб -- 06.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Loader_locfit_tutorial.pdf -- 158.4 Кб -- 06.04.2015
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188. http://hea-www.harvard.edu/AstroStat/astro193/MengGu_PCAofMaGNA.pdf
PCA Analysis of MaNGA Sky Spectra Meng Gu What is PCA Set of observations of possibly correlated variables Set of values of linearly uncorrelated variables (PCs) Straightforward & Has been applied to astro. spectra for many purposes. QSO-PCA Bailey 2012 Why PCA in Sky Subtraction To deal with complex and ever-changing telluric featu L s el One Body ree,vPCA method is promising! ... 0.Body Level Three 2<mean flux<0.2 2.Variance dy thevel F<0.8 Bo of Le flux our 3. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/MengGu_PCAofMaGNA.pdf -- 2437.9 Кб -- 06.05.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/MengGu_PCAofMaGNA.pdf -- 2437.9 Кб -- 06.05.2015
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189. http://hea-www.harvard.edu/AstroStat/astro193/PhilipCowperthwaite_ay193talk_updated.pdf
... Philip Cowperthwaite AY193 Final Project Presentation May 6th 2015 A Primer On RV Curves Source: ESO Plenty of Data · A collection of ~850 RV curves for stars with confirmed planets from the Caltech Exoplanet Archive (http://exoplanetarchive.ipac.caltech.edu/) Data contains date of observations, spectroscopically determined radial velocity, and errors. (e.g., data is pre-reduced) · The Model and The Method · The Keplerian Model (Hou et al. ... Poor likelihood function. ... What Could We Do Better? ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/PhilipCowperthwaite_ay193talk_updated.pdf -- 751.2 Кб -- 06.05.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/PhilipCowperthwaite_ay193talk_updated.pdf -- 751.2 Кб -- 06.05.2015
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190. http://hea-www.harvard.edu/AstroStat/astro193/Rdemo.txt
193 getwd() #shows which directory you are in help.start() #pops up a browser window with online help apropos( FITS ) # FITSio is crucial for astronomers library( FITSio ) #load the FITSio library ? FITSio #get help about FITSio ls() #what is available a - c(1,1,2,3,5,8,13) #define an array ls() #now should see a str(a) #what does a look like? summary (a) #statistical summary of a # sequences ...
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Rdemo.txt -- 2.4 Кб -- 04.02.2015
[ Сохраненная копия ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Rdemo.txt -- 2.4 Кб -- 04.02.2015
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191. http://hea-www.harvard.edu/AstroStat/astro193/Tsujimoto+2011_AA_G21.5.pdf
A A 525, A25 (2011) DOI: 10.1051/0004-6361/201015597 c ESO 2010 Astronomy Astrophysics Cross-calibration of the X-ray instruments onboard the Chandra, INTEGRAL, RXTE, Suzaku, Swift, and XMM-Newton observatories using G21.5 ­ 0.9 M. Tsujimoto1 , M. Guainazzi2 , P.P.Plucinsky3 , A.P.Beardmore4 ,M. Ishida1 , L. Natalucci5 , J. L. L. Posson-Brown3 , A. M. Read4 ... Data 3.3. ... 2008), G21.5­0.9 was also used to compare the power-law index and flux in 2­10 keV band using the same data set. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/Tsujimoto+2011_AA_G21.5.pdf -- 1949.9 Кб -- 09.02.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/Tsujimoto+2011_AA_G21.5.pdf -- 1949.9 Кб -- 09.02.2015
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192. http://hea-www.harvard.edu/AstroStat/astro193/VLK_feb18.pdf
MI dof -- yes, the square is outside dof = (N-1) (1 + (N/(N+1))(Wii/Bii)) 2 · · · · least-squares fitting and HW 4 Moments and intervals Random Numbers Binomial , Poisson , Gamma, Normal, І, Student's t Moments · Mm = x p(x) dx or Mm = x p(x) M0=1, mean=M1, variance=M2-M 2 1 m m · Moment Generating Function e f(x) Mm = M/x x m m · Characteristic Function () = e f(x) dx (i) /k! M f(x) = d e -ix iz k k (i) /k! M k k ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_feb18.pdf -- 206.4 Кб -- 18.02.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_feb18.pdf -- 206.4 Кб -- 18.02.2015
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193. http://hea-www.harvard.edu/AstroStat/astro193/VLK_jan26.pdf
HEK: Heliophysics Events Knowledgebase http://helioviewer.org http://www.lmsal.com/hek HER: Events Registry HCR: Coverage Registry http://www.lmsal.com/isolsearch Astro 193 : 2015-jan-26 : VLK See latest image of Sun taken with SDO/AIA using helioviewer HEK lists events and regions of interest on the Sun. ... Look at specific items using isolsearch, e.g., find a flare, look at its movie, download the data for detailed analysis. Flares on EV Lac Huenemoerder et al. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_jan26.pdf -- 641.5 Кб -- 27.01.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_jan26.pdf -- 641.5 Кб -- 27.01.2015
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194. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_Feb4.pdf
... What is R? · · Statistical computing environment programmable/scriptable C-like language (similar to matlab, IDL) Huge number of analysis packages, written for and by statisticians · · Where to get it from? · http ://www.r-project.org/ Recommended reading: Tutorial on AstroStatistics and R http ://hea-www.harvard.edu/AstroStat/Tutorial2014/ Some functionalities of R arithmetic linear algebra bootstrap resampling empirical distribution tests exploratory data ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_Feb4.pdf -- 299.6 Кб -- 04.02.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_Feb4.pdf -- 299.6 Кб -- 04.02.2015
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195. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr01.pdf
· · · · Spearman's and Kendall's Class on Apr 10 Gibbs sampler acceptance rates: third time's the charm Adaptive MCMC · · Bias- Variance Tradeoff / Kernel Density Estimation Signal Processing: Fourier Transforms Adaptive MCMC · Run a chain for a short number of iterations in the kth block with modified step size (Hyungsuk Tak) compute acceptance rate if 0.4/npar, inflate step size by f+=e+min{ 0.07 ,1/k} if 0.2/npar, deflate step ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr01.pdf -- 62.7 Кб -- 01.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr01.pdf -- 62.7 Кб -- 01.04.2015
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196. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr06.pdf
Astro 193 : 2015 Apr 6 · Follow-up · · · · · p-value vs Linear smoothing edge effects Kernel Density Estimation locfit HW 10 · · Signal Processing: Fourier Transforms Signal Processing: Wavelets Kernel Density Estimation · A kernel K(x) is a non-negative real-valued function such that xR dx K(x) = 1 ; E[x] = x R dx x K(x) = 0 ; E[x2] = xR dx x K(x) · The Kernel density estimator for a ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr06.pdf -- 271.6 Кб -- 06.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr06.pdf -- 271.6 Кб -- 06.04.2015
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197. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr13.pdf
... Orthonormal Wavelet Basis · · · · Fourier Transforms: Aliasing Lomb-Scargle Periodograms BayesFT Gaussian Processes, CAR Models 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 ... N}; Model f(t) = B1 cos(t) + B2 sin(t) + N(0,І) Schuster Periodogram C() = | ... N dj exp[itj] |І ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr13.pdf -- 135.6 Кб -- 13.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr13.pdf -- 135.6 Кб -- 13.04.2015
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198. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr15.pdf
... 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 ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr15.pdf -- 19.4 Кб -- 15.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr15.pdf -- 19.4 Кб -- 15.04.2015
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199. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr20.pdf
Astro 193 : 2015 Apr 20 · Follow-up · · · Bayesian Fourier Components HW 11 on Periodograms is online HW 12: on exposure time · · Gaussian Processes, CAR models Bayesian Blocks Bayesian Blocks · Studies in Astronomical Time Series Analysis. V. Bayesian Blocks, A New Method to Analyze Structure in Photon Counting Data, Scargle, J.D., 1998, ApJ 504, 405 Studies in Astronomical Time Series Analysis. ... 2011 Bayesian Blocks : Dynamic Programming Scargle et al. ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr20.pdf -- 489.1 Кб -- 20.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr20.pdf -- 489.1 Кб -- 20.04.2015
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200. http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr22.pdf
David van Dyk visit on Mon Apr 27 The Q: Feedback is open Homework 11: significance CAR : likelihood Homework 13 alteration · · Upper Limits Deconvolution Upper Limits · Critical point: cannot talk about an upper limit without invoking the process of detection Limits are placed on model intensity, not on measured ...
[ Текст ]  Ссылки http://hea-www.harvard.edu/AstroStat/astro193/VLK_slides_apr22.pdf -- 725.4 Кб -- 22.04.2015
[ Текст ]  Ссылки http://hea-www.harvard.edu/astrostat/astro193/VLK_slides_apr22.pdf -- 725.4 Кб -- 22.04.2015
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