Hercules A

Hercules A
Radio-Optical View of the Galaxy Hercules A - Many thanks to: NASA, ESA, S. Baum and C. O'Dea (RIT), R. Perley and W. Cotton (NRAO/AUI/NSF), and the Hubble Heritage Team (STScI/AURA)

Monday, March 29, 2010

The great Solar type III radio storm of November 11-17 2006

Radio JOVE Participant Dusty Samouce, who lives in the mountains of beautiful Montana, has many wonderful entries in the Radio JOVE Archive. Read this article about his Observatory, in the June 2006 Radio JOVE Bulletin.

Last summer I was camping in the Rocky Mountains, and I stopped at his home shown above. Unfortunately he was not in. I hope to meet him some day.

Studying Solar events, I found his chart above showing five traces: Radio JOVE 20.1 MHz, NML 25.2 kHz, NLK 24.8 kHZ, a skylight sensor, and a magnetometer.

It shows the great type III storm of November 11-17 2006.

Above is the STEREO WAVES spectrum for November 16.

Storm statistics from Eastwood et al., 2009 , Fig. 3.

SOHO ultraviolet images at 304 and 171 angstrom.

The Sun is becoming more active, and we expect great radio storms like this one soon.

Monday, March 22, 2010

Io-B arcs in STEREO WAVES, March 20 2010

Near 21 UT
Detail from the STEREO WAVES spectrum March 20

Map coded by Junpei Azuma, Imai Laboratory, Kochi National College of Technology, Japan.

Saturday, March 20, 2010

Solar and Jovian activity, March 19 2010

A type III burst near 5 UT reached 16 MHz in the STEREO WAVES Ahead and Behind spectra.

There is an Io-D arc near 3 UT, and a non-Io-D arc one Jovian revolution later, near 13 UT. Faint Io-C activity near 21-23 UT.

Saturday, March 13, 2010

Io-D arcs and type III bursts, March 12 2010

Detail from the STEREO WAVES spectrum for March 12, near 2 UT.

Map coded by Junpei Azuma, Imai Laboratory, Kochi National College of Technology, Japan.

Sunday, March 7, 2010

High resolution LOFAR image of 3C 61.1 at 173 MHz

The Netherlands Institute for Radio Astronomy ASTRON, and the Joint Institute for Very Long Baseline Interferometry in Europe JIVE, have published an outstanding high resolution image of radio source 3C 61.1 obtained with the Low Frequency Array LOFAR in Europe.

The image was computed using a small fraction of the data from 60 hours of observation with 20 LOFAR stations, and has a resolution of better than 10 arcseconds.
A even better image is expected, using more of the available data.

For comparison, the image above was made with the Very Large Array (at 1.5 GHz) in the United States, by Leahy and Perley in 1991.

See also Progress of LOFAR for a very brief description of the instrument.

Wednesday, March 3, 2010

Jovian and Solar activity 2010 March 1

Non-Io-C arc near 9 UT.

Solar bursts near 23 UT.
Details above from the March 1 SWAVES spectrum.

B class X-ray flare and Solar eclipses recorded by the GOES-14 Observatory.

Many thanks to the STEREO WAVES and GOES-14 Teams.

Tuesday, March 2, 2010

Jovian Io-D activity 2010 February 27

Detail from the February 27 SWAVES spectrum.
SWAVES Behind shows Io-D radiation near 16 UT, followed by SWAVES Ahead Io-D radiation near 17 UT.

Many thanks to the STEREO WAVES Team.