research

HERA Prescott – Starting to look like a dish!

This weekend, in a burst of activity with lots of hard work by students from ASU and Embry Riddle, it almost looks like we have dish. We’ve added the primary support pipes and in a marathon session of angle grinding, cut all the mesh pieces.  Next time we’ll be putting the rest of the supports and installing the mesh! Thanks …

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HERA Prescott – Cement. lots of cement

Today progress on the Prescott HERA dish took the form of building the dish hub and rim.  The hub is where all the dish supports (25′ pvc pipes) meet. The hub is made using concentric “sonotube” concrete forms in which are embedded 3″ plastic pipes set in a radial pattern.  Its basically a giant tinker toy hub made of cement. At …

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First ECHO paper

Our first paper about the drone calibrator is out on the arxiv today!  Using data from our field tests last year we measured the stability and accuracy of the beam maps. The repeatability compared well to measurements made using satellites (thats the plot on the right) and the measurements matched up well with the models. There were a few issues though. …

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HERA Prescott

When building any kind of instrument its really important for the people looking at the data to understand all the little things that go into building it and from an experimental perspective its key to be able to experiment with the hardware.  With the primary construction going on in South Africa this is a challenge. Travel to site is key, …

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First map of MWA tile!

Last week the ECHO team took the (relatively) short drive from Tempe up to Prescott, Arizona and Embry Riddle Aeronautical University to do some more testing at a new location.  The Embry-Riddle Physics department has put together a very nice campus observatory which is predominantly devoted to radio science, both astronomy and aerospace. Under the leadership of Professor Andri …

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First 19 HERA dishes activated in the Karoo.

Here’s some great news, the first stage of the Hydrogen Epoch of Reionization Array (HERA) has been finished and is now taking data. Now, witness the might of this fully operational battlestation. Well, actually we’re far from full size, so far we’ve got 19 out of the planned 350 dishes.  Here’s a picture.Each dish is 14 meters (42ft) across. …

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Early Science from Low-frequency Radio Telescopes

This year the Murchison Widefield Array annual December meeting was hosted by Arizona State University, here in Tempe. In celebration of over a year of active observing the meeting was opened to attendance and contributions from the wider community. The result was a rare convocation of the low frequency radio astronomy community. Topics ranged from …

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