November 1, 2017
Two new postdocs have joined the C-BASS project: Sebastian Kiehlmann in Caltech, and Stuart Harper in Manchester.
October 10, 2017
Moumita Aich will talk about C-BASS at the workshop on Post-Planck Cosmology: Enigma, Challenges and Visions at IUCAA, Pune, India.
September 29, 2017
Congratulations to Luke Jew, who successfully defended his PhD thesis on Measurements of Diffuse Galactic Emission at 5 GHz with C-BASS (University of Oxford).
November 1, 2016
Mike Peel is now a FAPESP Young Investigator fellow at the Departmento de Física Matemática, Instituto de Física, Universidade de São Paulo, Brazil; he is continuing to work on C-BASS.
October 11, 2016
We have a new PhD student in Oxford, Richard Grumitt, who will be working with us on C-BASS.
May 4, 2016
The C-BASS team is saddened by the death of Professor Richard Davis OBE, of the Jodrell Bank Centre for Astrophysics at Manchester University. He was an active member of the C-BASS team and made many important contributions to the project.
February 2016
Karenne Mata-Figueras was awarded an MSc (Manchester University) for her thesis on Steps towards Astronomical Component Separation with C-BASS.
December 2015
Michael Kennedy was awarded an MSc (Manchester University) for his thesis on Modelling of solar sidelobe profiles for the C-band All Sky Survey (C-BASS) North Telescope.
November 9, 2015
The C-BASS team is saddened by the death of Professor Rod Davies CBE FRS (8 January 1930 – 8 November 2015), former Director of Jodrell Bank Observatory and former President of the Royal Astronomical Society. He was a great supporter of C-BASS and contributed significantly to the project in many ways.
October 5, 2015
Adam Barr has joined C-BASS as a PhD student in Manchester.
April 7, 2015
The observations for the northern C-BASS survey have now been completed.
March 11, 2015
A paper on C-Band All-Sky Survey: a first look at the Galaxy by Mel Irfan and the C-BASS team has been published in Monthly Notices of the Royal Astronomical Society.
December 1-5, 2014
Results from C-BASS were reported at the conference Planck 2014: The microwave sky in temperature and polarization in Ferrara, Italy. Stephen Muchovej presented Early Results from C-BASS.
June 23, 2014
Melis Irfan and Luke Jew will present papers on C-BASS at the UK National Astronomy Meeting in Portsmouth this week.
June 23, 2014
Survey observations with the CBASS-S antenna have started at Klerefontein.
June 2, 2014
The receiver has been installed on the CBASS-S antenna at Klerefontein.
May 18, 2014
The receiver for CBASS-S has arrived at Klerefontein. A team from South Africa and Oxford are preparing it to start the southern survey observations.
May 16, 2014
The receiver for C-BASS south is now on its way across South Africa to its observing site at Klerefontein near Carnarvon in the Karoo (Northern Cape Province), following successful commissioning at the Hartebeesthoek Radio Astronomy Observatory (HartRAO).
March 20, 2014
Congratulations to Luke Jew on winning the second Oxford Science Slam with a performance entitled How C-BASS will help us understand the very first moments of creation. Science Slam UK “travel across the country to find the freshest young minds who can take an audience by storm, armed with nothing but their own research and ten minutes on the clock. In a battle of humour and wit, our insatiable slammers must lay their science on the line for the adoration of the audience and the chance to win the coveted slam Champ Boxing Gloves!” Watch the video.
March 2014
The receiver and software of the Southern C-BASS telescope are being put through final tests at Hartebeesthoek Radio Astronomy Observatory (HartRAO), and planning is under way to install the receiver at Klerefontein in the Karoo later this year. For more details, see the report in SKA South Africa eNews.
March 1, 2014
The paper The C-Band All-Sky Survey (C-BASS): Design and implementation of the northern receiver has been published in Monthly Notices
December 20, 2013
C-BASS is on wikipedia.
December 5, 2013
Rach Bhatawdekar (University of Manchester) was awarded a MSc by Research with Merit for her dissertation on Observations with C-BASS, focussing on the analysis of polarization calibrators.
October 26, 2013
A paper entitled The C-Band All-Sky Survey (C-BASS): Design and implementation of the northern receiver by O.G. King, Michael E. Jones, E.J. Blackhurst, C. Copley, R.J. Davis, C. Dickinson, C.M. Holler, M.O. Irfan, J.J. John, J.P. Leahy, J. Leech, S.J.C. Muchovej, T.J. Pearson, M.A. Stevenson, and Angela C. Taylor has been submitted to Monthly Notices of the Royal Astronomical Society (accepted 4 December, 2013). A preprint is available at
October 10, 2013
Mr Luke Jew has joined the C-BASS project as a D.Phil. student at Oxford University.
October, 2013
Charles Copley successfuly defended his Oxford D.Phil. thesis on C-BASS. Congratulations Charles! Charles is now a Research Associate at the Square Kilometre Array Project in South Africa, where he is managing the day-to-day activities of the southern C-BASS project in South Africa.
September 17, 2013
Commissioning of the southern C-BASS receiver at HartRAO continues with beam measurements using an artifical source. Meanwhile the infrastructure at Klerefontein (Karoo) is being readied to install the receiver after completion of commissioning at HartRAO.
July-September, 2013
Mr Thomas Armitage worked on C-BASS data analysis as a summer undergraduate student at the University of Manchester. He studied the beam profile of C-BASS north and investigated whether daytime observations can be cleaned of solar sidelobes sufficiently for inclusion in the sky maps.
August 30, 2013
Dr H. Cynthia Chiang and Professor Jonathan Sievers of the Astrophysics and Cosmology Research Unit ( ACRU), University of KwaZulu-Natal, Durban, South Africa have joined the C-BASS project. They and their PhD student Heiko Heilgendorff will be playing a leading role in the southern C-BASS survey as well as participating in the data reduction and analysis of the whole survey.
August 20, 2013
Dr Michael Peel of the University of Manchester has joined the C-BASS project.
August 22, 2013
Tim Pearson presented Preliminary results on AME from C-BASS at a Workshop on AME (Anomalous Microwave Emission) at Caltech. This was based on work done by Matthew Stevenson for his thesis.
July 12, 2013
Matthew Stevenson successfully defended his Caltech PhD thesis on Observational and Theoretical Advances in Cosmological Foreground Emission. Congratulations Matthew! On August 1, Matthew left the C-BASS project and took up a position as Senior Algorithm Architect at Synaptics, Inc., in San Jose, California.
June 14, 2013
Clive Dickinson makes a presentation on C-BASS at CMB2013 in Okinawa, Japan.
June 14, 2013
C-BASS makes a brief appearance in the new Superman movie Man of Steel. This scene was filmed at OVRO on February 3, 2012.
April 2, 2013
Melis Irfan presents a poster on C-BASS and foreground separation at the conference The Universe as seen by Planck held at Noordwijk, The Netherlands.
March 27, 2013
The SKA South Africa Project issues a press release to announce the start of work to commission C-BASS-S in South Africa.
March 21, 2013
ESA and NASA release the first full-sky maps from the Planck satellite, in intensity only; polarization maps are expected in 2014. The C-BASS polarization map will be essential for fully understanding the Planck polarization results.
February 25, 2013
The C-BASS-S receiver arrives in HartRAO and is met by Jamie, Charles, and Angela. See the commissioning blog.
February 16, 2013
C-BASS-N is back on the air after repair of the receiver cold-head.
February 12, 2013
The completed C-BASS-S receiver is shipped from Oxford to HartRAO for commissioning.
November 28, 2012
Mike Jones makes a presentation on C-BASS at the meeting on Polarized Foreground for Cosmic Microwave Background, MPIfA, Garching, Germany.
September 28, 2012
Rachana (Rach) Bhatawdeka, a new MSc student at Manchester, is now working on C-BASS.
July 4-6, 2012
C-BASS collaboration meeting in Oxford.
June 6, 2012
Matthew Stevenson gives a talk about C-BASS at the CASCA-12 meeting of the Canadian Astronomical Society in Calgary, Canada.
February 13-17, 2012
C-BASS presentations at the meeting Astrophysics from the radio to the sub-millimetre: Planck and other experiments in temperature and polarization in Bologna, Italy
January 8, 2012
Oliver King presents a poster about C-BASS at the American Astronomical Society meeting in Austin, Texas.
July 27-29, 2011
C-BASS collaboration meeting in Oxford - see the picture!
July 2011
RFI improves with notch filters and additional bandpass filters. We’ve been increasingly concerned about the wide range of RFI near 5 GHz that appears to be getting in and contaminating large areas of our maps. Two notch filters and an additional bandpass filter have really cleaned things up (see our pictures page) and we are now confident that we can get on with the main survey.
Spring 2011
New secondary support improves stability of telescope! Due to some problems with our foam cone support we had to replace the old one with a new and stiffer assembly. The secondary is now carbon fibre and therefore much lighter than the original design.
Winter 2010
Electronics shakedown: We've been improving our system by identifying and removing pickup from various electronic components. Our data are now much cleaner and we achieving 1/f knee frequencies of ~10-30 mHz.
Fall 2010
Growing pains for CBASS. We’ve had a few issues with the telescope and CBASS learns the joy of "getting what you paid for" when the elevation drive for the telescope gifted to us by JPL failed. This was replaced and we're back in action.
8 June 2010
The OVRO dish has recently been upgraded with an absorbing tunnel around the edge of the primary. Not only does look pretty, it helps with our sidelobe performance! Take a look in our pictures page.
14 May 2010
Our FIRST MAP is here! The colour scale shows the total-power in the Cygnus region of the sky. Cygnus-A is the bright spot on the right, while the diffuse emission is Galactic emission from the Cygnus-X region and Galactic plane, which is dominated by free-free (thermal) emission.
22 December 2009
FIRST LIGHT! We now have first light on the Moon with the full system! See here for proof!
6 August 2009
The C-BASS receiver is now on the OVRO 6.1m dish and cold! (see the pictures page for a photo!)
1 August 2009
The C-BASS receiver has just arrived at OVRO (from Oxford). We will now begin testing the equipment and begin commissioning the system on the telescope!
30 June 2009
Webpage has been updated!
30 June 2009
Receiver #1 is undergoing final testing at Oxford, before it gets shipped to California for the commissioning phase.
30 June 2009
We are pleased to announce that the National Centre for Mathematics and Physics at King Abdulaziz City for Science and Technology (KACST) has joined the C-BASS collaboration. KACST will be funding the construction of a 2nd receiver system, designed at the University of Oxford. This will allow the southern survey to start earlier as well as to allow dual observations with 2 telescopes, which will eventually provide more sensitive maps, and better control of systematics (e.g. RFI, bad weather etc.) The 2nd receiver will be constructed at the Universities of Manchester and Oxford, with help from technicians and engineers from KACST.
Luke Jew

Luke Jew presents C-BASS results at Cosmology on Safari, KwaZulu-Natal, South Africa (February 15, 2017).

C-BASS at Klerefontein

Installing the receiver on the C-BASS southern antenna at Klerefontein (June 2, 2014).


Northern receiver paper (King et al. 2014; March 2014).

Last modified: Tue Oct 24 14:04:01 PDT 2017