Paper Title: A Flux Scale for Southern Hemisphere 21cm EoR Experiments arxiv,data,fits If you look at typical catalogs of sources in the southern hemisphere epoch of reionization band you soon realize why measurements often disagree by 20%. Even the brightest sources one would use for calibration are uncertain. As you can see from the plot to […]
In which PAPER sets the standard Read More »
Title: The precision and accuracy of early Epoch of Reionization foreground models: comparing MWA and PAPER 32-antenna source catalogs This paper compares the fluxes in the first PAPER and MWA catalogs. These sources are the brightest foregrounds in front of the EoR HI emission. Various estimates suggest that we have to subtract these guys to anywhere
Publication: The precision and accuracy of early Epoch of Reionization foreground models Read More »
Today I needed a distraction so I transcoded some PAPER data into sound. It sounds really weird! Cross-posted at asuexplorers.sese.edu
The sound of PAPER Read More »
Title: “A Per-baseline, Delay-spectrum Technique for Accessing the 21 cm Cosmic Reionization Signature” This paper explains the PAPER method for measuring the EoR power spectrum. While some experiments plan on subtracting foregrounds, PAPER will stick to uncontaminated regions of power spectrum space. Narrow field simulations had previously expected this region to have little dependence on
Publication: The PAPER power spectrum method Read More »
Title: A Sensitivity and Array-configuration Study for Measuring the Power Spectrum of 21 cm Emission from Reionization PAPER will soon be performing long integrations to the power spectrum of high redshift Hydrogen. What is the best configuration? In the process of answering this question we also carefully (re) derive the relationship between the output of an
Publication: PAPER configuration and sensitivity Read More »
Here is a link to my PAPER thesis for posterity. It included a catalog, as well as studies of calibration stability and noise properties. I included a lot of extra information about the 32 antenna catalog that was cut from the original letter. Then, looking at 12 nights of data I found that despite high
My Doctoral Thesis Read More »
We’ve used data from April and September 2009 to make an image of the sky that covers 30000 square degrees. This is more than half of the entire sky! The results, including a list of the fluxes of known sources, are published in the Astrophysical Journal Letters. The data are also available here: PSA32 Healpix
Publication: First PAPER Catalog Read More »
Onward to 32! This month we added another shipment of 16 antenna to bring PAPER to 32 antennae. The arrangement of the antennae on the ground is very close to random, making geography tricky! I spent a good amount of time out there with the GPS pole and pack, marking out locations of antennae. We
PAPER 2010 Deployment Read More »
Adds some “essential” modules to CASA and the ability to install more via the casapython script. Currently adds the following modules: AIPY pyephem mpl_basemap pyfits vo.table setuptools psycopg2 Download: PAPERcasa-1.4.tar.bz2 18 Jul. 2012 PAPERcasa-1.3.tar.bz2 27 Feb. 2012 Installation: tar -xvf PAPERcasa-1.3.tar.bz2 cd PAPERcasa ./install_PAPERcasa.sh Usage: Install additional python libraries with: PAPERcasa/PAPERcasa_env.sh #required for packages that
Project: PAPERcasa Read More »
I’ve just returned from building the first 16 antenna section of PAPER in South Africa. The site is in the northern part of the country in the middle of the Karoo desert. With its brown sandy dirt and scrub brush the desert is much like middle New Mexico and felt just like home! Here is
PAPER 2009 Deployment Read More »