WFRF:(Van Der Horst A. J.)
Sökning: WFRF:(Van Der Horst A. J.) > Lofar low-band ante...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 06442naa a2201633 4500 | |
| 001 | oai:research.chalmers.se:d7b6b6d5-4808-4bbe-afab-ba963877058a | |
| 003 | SwePub | |
| 008 | 171008s2014 | |||||||||||000 ||eng| | |
| 009 | oai:DiVA.org:lnu-51546 | |
| 024 | 7 | a https://research.chalmers.se/publication/2057362 URI |
| 024 | 7 | a https://doi.org/10.1088/0004-637X/793/2/822 DOI |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-515462 URI |
| 040 | a (SwePub)cthd (SwePub)lnu | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a van Weeren, R. J.4 aut |
| 245 | 1 0 | a Lofar low-band antenna observations of the 3C 295 and boötes fields: Source counts and ultra-steep spectrum sources |
| 264 | 1 | c 2014 |
| 520 | a We present Low Frequency Array (LOFAR) Low Band observations of the Bootes and 3C 295 fields. Our images made at 34, 46, and 62 MHz reach noise levels of 12, 8, and 5 mJy beam(-1), making them the deepest images ever obtained in this frequency range. In total, we detect between 300 and 400 sources in each of these images, covering an area of 17-52 deg(2). From the observations, we derive Euclidean-normalized differential source counts. The 62 MHz source counts agree with previous GMRT 153 MHz and Very Large Array 74 MHz differential source counts, scaling with a spectral index of -0.7. We find that a spectral index scaling of -0.5 is required to match up the LOFAR 34 MHz source counts. This result is also in agreement with source counts from the 38 MHz 8C survey, indicating that the average spectral index of radio sources flattens toward lower frequencies. We also find evidence for spectral flattening using the individual flux measurements of sources between 34 and 1400 MHz and by calculating the spectral index averaged over the source population. To select ultra-steep spectrum (alpha | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a large array | |
| 653 | a deep | |
| 653 | a frequency sky survey | |
| 653 | a mini-survey | |
| 653 | a 74 mhz | |
| 653 | a scale structure survey | |
| 653 | a wide-field | |
| 653 | a active galactic nuclei | |
| 653 | a redshift radio galaxies | |
| 653 | a extragalactic survey | |
| 653 | a Astroparticle Physics | |
| 700 | 1 | a Williams, W. L.4 aut |
| 700 | 1 | a Tasse, C.4 aut |
| 700 | 1 | a Rottgering, H.4 aut |
| 700 | 1 | a Rafferty, D.4 aut |
| 700 | 1 | a van der Tol, S.4 aut |
| 700 | 1 | a Heald, G.4 aut |
| 700 | 1 | a White, G. J.4 aut |
| 700 | 1 | a Shulevski, A.4 aut |
| 700 | 1 | a Best, P.4 aut |
| 700 | 1 | a Intema, H. T.4 aut |
| 700 | 1 | a Bhatnagar, S.4 aut |
| 700 | 1 | a Reich, W.4 aut |
| 700 | 1 | a Steinmetz, M.4 aut |
| 700 | 1 | a van Velzen, S.4 aut |
| 700 | 1 | a Ensslin, T. A.4 aut |
| 700 | 1 | a Prandoni, I.4 aut |
| 700 | 1 | a De Gasperin, F.4 aut |
| 700 | 1 | a Jamrozy, M.4 aut |
| 700 | 1 | a Brunetti, G.4 aut |
| 700 | 1 | a Jarvis, M. J.4 aut |
| 700 | 1 | a McKean, J. P.4 aut |
| 700 | 1 | a Wise, M. W.4 aut |
| 700 | 1 | a Ferrari, C.4 aut |
| 700 | 1 | a Harwood, J.4 aut |
| 700 | 1 | a Oonk, J. B. R.4 aut |
| 700 | 1 | a Hoeft, M.4 aut |
| 700 | 1 | a Kunert-Bajraszewska, M.4 aut |
| 700 | 1 | a Horellou, Cathy,d 1967u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)horellou |
| 700 | 1 | a Wucknitz, O.4 aut |
| 700 | 1 | a Bonafede, A.4 aut |
| 700 | 1 | a Mohan, N. R.4 aut |
| 700 | 1 | a Scaife, A. M. M.4 aut |
| 700 | 1 | a Kloeckner, H. -R.4 aut |
| 700 | 1 | a van Bemmel, I.4 aut |
| 700 | 1 | a Merloni, A.4 aut |
| 700 | 1 | a Chyz̊y, K.T.4 aut |
| 700 | 1 | a Engels, D.4 aut |
| 700 | 1 | a Falcke, H.4 aut |
| 700 | 1 | a Pandey-Pommier, M.4 aut |
| 700 | 1 | a Alexov, A.4 aut |
| 700 | 1 | a Anderson, J.4 aut |
| 700 | 1 | a Avruch, I. M.4 aut |
| 700 | 1 | a Beck, R.4 aut |
| 700 | 1 | a Bell, M. E.4 aut |
| 700 | 1 | a Bentum, M. J.4 aut |
| 700 | 1 | a Bernardi, G.4 aut |
| 700 | 1 | a Breitling, F.4 aut |
| 700 | 1 | a Broderick, J.4 aut |
| 700 | 1 | a Brouw, W. N.4 aut |
| 700 | 1 | a Brueggen, M.4 aut |
| 700 | 1 | a Butcher, H. R.4 aut |
| 700 | 1 | a Ciardi, B.4 aut |
| 700 | 1 | a de Geus, E.4 aut |
| 700 | 1 | a de Vos, M.4 aut |
| 700 | 1 | a Deller, A.4 aut |
| 700 | 1 | a Duscha, S.4 aut |
| 700 | 1 | a Eislöffel, J.4 aut |
| 700 | 1 | a Fallows, R. A.4 aut |
| 700 | 1 | a Frieswijk, W.4 aut |
| 700 | 1 | a Garrett, M. A.4 aut |
| 700 | 1 | a Griessmeier, J.4 aut |
| 700 | 1 | a Gunst, A. W.4 aut |
| 700 | 1 | a Hamaker, J. P.4 aut |
| 700 | 1 | a Hassall, T. E.4 aut |
| 700 | 1 | a Horandel, J.4 aut |
| 700 | 1 | a van der Horst, A.4 aut |
| 700 | 1 | a Iacobelli, M.4 aut |
| 700 | 1 | a Jackson, N. J.4 aut |
| 700 | 1 | a Juette, E.4 aut |
| 700 | 1 | a Kondratiev, V. I.4 aut |
| 700 | 1 | a Kuniyoshi, M.4 aut |
| 700 | 1 | a Maat, P.4 aut |
| 700 | 1 | a Mann, G.4 aut |
| 700 | 1 | a McKay-Bukowski, D.4 aut |
| 700 | 1 | a Mevius, M.4 aut |
| 700 | 1 | a Morganti, R.4 aut |
| 700 | 1 | a Munk, H.4 aut |
| 700 | 1 | a Offringa, A. R.4 aut |
| 700 | 1 | a Orru, E.4 aut |
| 700 | 1 | a Paas, H.4 aut |
| 700 | 1 | a Pandey, V. N.4 aut |
| 700 | 1 | a Pietka, G.4 aut |
| 700 | 1 | a Pizzo, R.4 aut |
| 700 | 1 | a Polatidis, A. G.4 aut |
| 700 | 1 | a Renting, A.4 aut |
| 700 | 1 | a Rowlinson, A.4 aut |
| 700 | 1 | a Schwarz, D.4 aut |
| 700 | 1 | a Serylak, M.4 aut |
| 700 | 1 | a Sluman, J.4 aut |
| 700 | 1 | a Smirnov, O.4 aut |
| 700 | 1 | a Stappers, B. W.4 aut |
| 700 | 1 | a Stewart, A.4 aut |
| 700 | 1 | a Swinbank, J.4 aut |
| 700 | 1 | a Tagger, M.4 aut |
| 700 | 1 | a Tang, Y.4 aut |
| 700 | 1 | a Thoudam, Satyendrau Radboud University Nijmegen, The Netherlands4 aut0 (Swepub:lnu)sathaa |
| 700 | 1 | a Toribio, C.4 aut |
| 700 | 1 | a Vermeulen, R.4 aut |
| 700 | 1 | a Vocks, C.4 aut |
| 700 | 1 | a Zarka, P.4 aut |
| 710 | 2 | a Chalmers tekniska högskolab Radboud University Nijmegen, The Netherlands4 org |
| 773 | 0 | t Astrophysical Journalg 793:2, s. art. 82-q 793:2<art. 82-x 1538-4357x 0004-637X |
| 856 | 4 8 | u https://research.chalmers.se/publication/205736 |
| 856 | 4 8 | u https://doi.org/10.1088/0004-637X/793/2/82 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-51546 |
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- Williams, W. L.
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- Heald, G.
- White, G. J.
- Shulevski, A.
- Best, P.
- Intema, H. T.
- Bhatnagar, S.
- Reich, W.
- Steinmetz, M.
- van Velzen, S.
- Ensslin, T. A.
- Prandoni, I.
- De Gasperin, F.
- Jamrozy, M.
- Brunetti, G.
- Jarvis, M. J.
- McKean, J. P.
- Wise, M. W.
- Ferrari, C.
- Harwood, J.
- Oonk, J. B. R.
- Hoeft, M.
- Kunert-Bajraszew ...
- Horellou, Cathy, ...
- Wucknitz, O.
- Bonafede, A.
- Mohan, N. R.
- Scaife, A. M. M.
- Kloeckner, H. -R ...
- van Bemmel, I.
- Merloni, A.
- Chyz̊y, K.T.
- Engels, D.
- Falcke, H.
- Pandey-Pommier, ...
- Alexov, A.
- Anderson, J.
- Avruch, I. M.
- Beck, R.
- Bell, M. E.
- Bentum, M. J.
- Bernardi, G.
- Breitling, F.
- Broderick, J.
- Brouw, W. N.
- Brueggen, M.
- Butcher, H. R.
- Ciardi, B.
- de Geus, E.
- de Vos, M.
- Deller, A.
- Duscha, S.
- Eislöffel, J.
- Fallows, R. A.
- Frieswijk, W.
- Garrett, M. A.
- Griessmeier, J.
- Gunst, A. W.
- Hamaker, J. P.
- Hassall, T. E.
- Horandel, J.
- van der Horst, A ...
- Iacobelli, M.
- Jackson, N. J.
- Juette, E.
- Kondratiev, V. I ...
- Kuniyoshi, M.
- Maat, P.
- Mann, G.
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- Mevius, M.
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- Offringa, A. R.
- Orru, E.
- Paas, H.
- Pandey, V. N.
- Pietka, G.
- Pizzo, R.
- Polatidis, A. G.
- Renting, A.
- Rowlinson, A.
- Schwarz, D.
- Serylak, M.
- Sluman, J.
- Smirnov, O.
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