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28 results on '"Croston, J. H."'

1. The LOFAR Two-Metre Sky Survey

Author

Hardcastle, M. J., primary, Horton, M. A., additional, Williams, W. L., additional, Duncan, K. J., additional, Alegre, L., additional, Barkus, B., additional, Croston, J. H., additional, Dickinson, H., additional, Osinga, E., additional, Röttgering, H. J. A., additional, Sabater, J., additional, Shimwell, T. W., additional, Smith, D. J. B., additional, Best, P. N., additional, Botteon, A., additional, Brüggen, M., additional, Drabent, A., additional, de Gasperin, F., additional, Gürkan, G., additional, Hajduk, M., additional, Hale, C. L., additional, Hoeft, M., additional, Jamrozy, M., additional, Kunert-Bajraszewska, M., additional, Kondapally, R., additional, Magliocchetti, M., additional, Mahatma, V. H., additional, Mostert, R. I. J., additional, O’Sullivan, S. P., additional, Pajdosz-Śmierciak, U., additional, Petley, J., additional, Pierce, J. C. S., additional, Prandoni, I., additional, Schwarz, D. J., additional, Shulewski, A., additional, Siewert, T. M., additional, Stott, J. P., additional, Tang, H., additional, Vaccari, M., additional, Zheng, X., additional, Bailey, T., additional, Desbled, S., additional, Goyal, A., additional, Gonano, V., additional, Hanset, M., additional, Kurtz, W., additional, Lim, S. M., additional, Mielle, L., additional, Molloy, C. S., additional, Roth, R., additional, Terentev, I. A., additional, and Torres, M., additional

Published
2023
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2. The LOFAR Two-metre Sky Survey

Author

Shimwell, T. W., Hardcastle, M. J., Tasse, C., Best, P. N., Röttgering, H. J. A., Williams, W. L., Botteon, A., Drabent, A., Mechev, A., Shulevski, A., van Weeren, R. J., Bester, L., Brüggen, M., Brunetti, G., Callingham, J. R., Chyży, K. T., Conway, J. E., Dijkema, T. J., Duncan, K., de Gasperin, F., Hale, C. L., Haverkorn, M., Hugo, B., Jackson, N., Mevius, M., Miley, G. K., Morabito, L. K., Morganti, R., Offringa, A., Oonk, J. B. R., Rafferty, D., Sabater, J., Smith, D. J. B., Schwarz, D. J., Smirnov, O., O’Sullivan, S. P., Vedantham, H., White, G. J., Albert, J. G., Alegre, L., Asabere, B., Bacon, D. J., Bonafede, A., Bonnassieux, E., Brienza, M., Bilicki, M., Bonato, M., Calistro Rivera, G., Cassano, R., Cochrane, R., Croston, J. H., Cuciti, V., Dallacasa, D., Danezi, A., Dettmar, R. J., Di Gennaro, G., Edler, H. W., Enßlin, T. A., Emig, K. L., Franzen, T. M. O., García-Vergara, C., Grange, Y. G., Gürkan, G., Hajduk, M., Heald, G., Heesen, V., Hoang, D. N., Hoeft, M., Horellou, C., Iacobelli, M., Jamrozy, M., Jelić, V., Kondapally, R., Kukreti, P., Kunert-Bajraszewska, M., Magliocchetti, M., Mahatma, V., Małek, K., Mandal, S., Massaro, F., Meyer-Zhao, Z., Mingo, B., Mostert, R. I. J., Nair, D. G., Nakoneczny, S. J., Nikiel-Wroczyński, B., Orrú, E., Pajdosz-Śmierciak, U., Pasini, T., Prandoni, I., van Piggelen, H. E., Rajpurohit, K., Retana-Montenegro, E., Riseley, C. J., Rowlinson, A., Saxena, A., Schrijvers, C., Sweijen, F., Siewert, T. M., Timmerman, R., Vaccari, M., Vink, J., West, J. L., Wołowska, A., Zhang, X., and Zheng, J.

Subjects
Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey we present 120–168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44◦300 and 1h00m +28◦000 and spanning 4178 and 1457 square degrees respectively. The images were derived from 3451 h (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4 396 228 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 600 resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 µJy beam−1 ; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.200; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy beam−1 . By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit with an error on the derived spectral index of >±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 2000 resolution 120–168 MHz continuum images have a median rms sensitivity of 95 µJy beam−1 , and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 × 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8 mJy beam−1 at 40 and 2.2 mJy beam−1 at 2000; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.

Published
2022

3. The LOFAR Two-metre Sky Survey

Author

Shimwell, T. W., primary, Hardcastle, M. J., additional, Tasse, C., additional, Best, P. N., additional, Röttgering, H. J. A., additional, Williams, W. L., additional, Botteon, A., additional, Drabent, A., additional, Mechev, A., additional, Shulevski, A., additional, van Weeren, R. J., additional, Bester, L., additional, Brüggen, M., additional, Brunetti, G., additional, Callingham, J. R., additional, Chyży, K. T., additional, Conway, J. E., additional, Dijkema, T. J., additional, Duncan, K., additional, de Gasperin, F., additional, Hale, C. L., additional, Haverkorn, M., additional, Hugo, B., additional, Jackson, N., additional, Mevius, M., additional, Miley, G. K., additional, Morabito, L. K., additional, Morganti, R., additional, Offringa, A., additional, Oonk, J. B. R., additional, Rafferty, D., additional, Sabater, J., additional, Smith, D. J. B., additional, Schwarz, D. J., additional, Smirnov, O., additional, O’Sullivan, S. P., additional, Vedantham, H., additional, White, G. J., additional, Albert, J. G., additional, Alegre, L., additional, Asabere, B., additional, Bacon, D. J., additional, Bonafede, A., additional, Bonnassieux, E., additional, Brienza, M., additional, Bilicki, M., additional, Bonato, M., additional, Calistro Rivera, G., additional, Cassano, R., additional, Cochrane, R., additional, Croston, J. H., additional, Cuciti, V., additional, Dallacasa, D., additional, Danezi, A., additional, Dettmar, R. J., additional, Di Gennaro, G., additional, Edler, H. W., additional, Enßlin, T. A., additional, Emig, K. L., additional, Franzen, T. M. O., additional, García-Vergara, C., additional, Grange, Y. G., additional, Gürkan, G., additional, Hajduk, M., additional, Heald, G., additional, Heesen, V., additional, Hoang, D. N., additional, Hoeft, M., additional, Horellou, C., additional, Iacobelli, M., additional, Jamrozy, M., additional, Jelić, V., additional, Kondapally, R., additional, Kukreti, P., additional, Kunert-Bajraszewska, M., additional, Magliocchetti, M., additional, Mahatma, V., additional, Małek, K., additional, Mandal, S., additional, Massaro, F., additional, Meyer-Zhao, Z., additional, Mingo, B., additional, Mostert, R. I. J., additional, Nair, D. G., additional, Nakoneczny, S. J., additional, Nikiel-Wroczyński, B., additional, Orrú, E., additional, Pajdosz-Śmierciak, U., additional, Pasini, T., additional, Prandoni, I., additional, van Piggelen, H. E., additional, Rajpurohit, K., additional, Retana-Montenegro, E., additional, Riseley, C. J., additional, Rowlinson, A., additional, Saxena, A., additional, Schrijvers, C., additional, Sweijen, F., additional, Siewert, T. M., additional, Timmerman, R., additional, Vaccari, M., additional, Vink, J., additional, West, J. L., additional, Wołowska, A., additional, Zhang, X., additional, and Zheng, J., additional

Published
2022
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4. Sub-arcsecond imaging with the International LOFAR Telescope

Author

Morabito, L. K., primary, Jackson, N. J., additional, Mooney, S., additional, Sweijen, F., additional, Badole, S., additional, Kukreti, P., additional, Venkattu, D., additional, Groeneveld, C., additional, Kappes, A., additional, Bonnassieux, E., additional, Drabent, A., additional, Iacobelli, M., additional, Croston, J. H., additional, Best, P. N., additional, Bondi, M., additional, Callingham, J. R., additional, Conway, J. E., additional, Deller, A. T., additional, Hardcastle, M. J., additional, McKean, J. P., additional, Miley, G. K., additional, Moldon, J., additional, Röttgering, H. J. A., additional, Tasse, C., additional, Shimwell, T. W., additional, van Weeren, R. J., additional, Anderson, J. M., additional, Asgekar, A., additional, Avruch, I. M., additional, van Bemmel, I. M., additional, Bentum, M. J., additional, Bonafede, A., additional, Brouw, W. N., additional, Butcher, H. R., additional, Ciardi, B., additional, Corstanje, A., additional, Coolen, A., additional, Damstra, S., additional, de Gasperin, F., additional, Duscha, S., additional, Eislöffel, J., additional, Engels, D., additional, Falcke, H., additional, Garrett, M. A., additional, Griessmeier, J., additional, Gunst, A. W., additional, van Haarlem, M. P., additional, Hoeft, M., additional, van der Horst, A. J., additional, Jütte, E., additional, Kadler, M., additional, Koopmans, L. V. E., additional, Krankowski, A., additional, Mann, G., additional, Nelles, A., additional, Oonk, J. B. R., additional, Orru, E., additional, Paas, H., additional, Pandey, V. N., additional, Pizzo, R. F., additional, Pandey-Pommier, M., additional, Reich, W., additional, Rothkaehl, H., additional, Ruiter, M., additional, Schwarz, D. J., additional, Shulevski, A., additional, Soida, M., additional, Tagger, M., additional, Vocks, C., additional, Wijers, R. A. M. J., additional, Wijnholds, S. J., additional, Wucknitz, O., additional, Zarka, P., additional, and Zucca, P., additional

Published
2022
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5. The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1

Author

Kondapally, R., primary, Best, P. N., additional, Hardcastle, M. J., additional, Nisbet, D., additional, Bonato, M., additional, Sabater, J., additional, Duncan, K. J., additional, McCheyne, I., additional, Cochrane, R. K., additional, Bowler, R. A. A., additional, Williams, W. L., additional, Shimwell, T. W., additional, Tasse, C., additional, Croston, J. H., additional, Goyal, A., additional, Jamrozy, M., additional, Jarvis, M. J., additional, Mahatma, V. H., additional, Röttgering, H. J. A., additional, Smith, D. J. B., additional, Wołowska, A., additional, Bondi, M., additional, Brienza, M., additional, Brown, M. J. I., additional, Brüggen, M., additional, Chambers, K., additional, Garrett, M. A., additional, Gürkan, G., additional, Huber, M., additional, Kunert-Bajraszewska, M., additional, Magnier, E., additional, Mingo, B., additional, Mostert, R., additional, Nikiel-Wroczyński, B., additional, O’Sullivan, S. P., additional, Paladino, R., additional, Ploeckinger, T., additional, Prandoni, I., additional, Rosenthal, M. J., additional, Schwarz, D. J., additional, Shulevski, A., additional, Wagenveld, J. D., additional, and Wang, L., additional

Published
2021
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6. The environments of radio-loud AGN from the LOFAR Two-Metre Sky Survey (LoTSS)

Author

Croston, J. H., primary, Hardcastle, M. J., additional, Mingo, B., additional, Best, P. N., additional, Sabater, J., additional, Shimwell, T. M., additional, Williams, W. L., additional, Duncan, K. J., additional, Röttgering, H. J. A., additional, Brienza, M., additional, Gürkan, G., additional, Ineson, J., additional, Miley, G. K., additional, Morabito, L. M., additional, O’Sullivan, S. P., additional, and Prandoni, I., additional

Published
2019
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7. The LOFAR Two-metre Sky Survey

Author

Duncan, K. J., primary, Sabater, J., additional, Röttgering, H. J. A., additional, Jarvis, M. J., additional, Smith, D. J. B., additional, Best, P. N., additional, Callingham, J. R., additional, Cochrane, R., additional, Croston, J. H., additional, Hardcastle, M. J., additional, Mingo, B., additional, Morabito, L., additional, Nisbet, D., additional, Prandoni, I., additional, Shimwell, T. W., additional, Tasse, C., additional, White, G. J., additional, Williams, W. L., additional, Alegre, L., additional, Chyży, K. T., additional, Gürkan, G., additional, Hoeft, M., additional, Kondapally, R., additional, Mechev, A. P., additional, Miley, G. K., additional, Schwarz, D. J., additional, and van Weeren, R. J., additional

Published
2019
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8. The LOFAR Two-metre Sky Survey

Author

Shimwell, T. W., primary, Tasse, C., additional, Hardcastle, M. J., additional, Mechev, A. P., additional, Williams, W. L., additional, Best, P. N., additional, Röttgering, H. J. A., additional, Callingham, J. R., additional, Dijkema, T. J., additional, de Gasperin, F., additional, Hoang, D. N., additional, Hugo, B., additional, Mirmont, M., additional, Oonk, J. B. R., additional, Prandoni, I., additional, Rafferty, D., additional, Sabater, J., additional, Smirnov, O., additional, van Weeren, R. J., additional, White, G. J., additional, Atemkeng, M., additional, Bester, L., additional, Bonnassieux, E., additional, Brüggen, M., additional, Brunetti, G., additional, Chyży, K. T., additional, Cochrane, R., additional, Conway, J. E., additional, Croston, J. H., additional, Danezi, A., additional, Duncan, K., additional, Haverkorn, M., additional, Heald, G. H., additional, Iacobelli, M., additional, Intema, H. T., additional, Jackson, N., additional, Jamrozy, M., additional, Jarvis, M. J., additional, Lakhoo, R., additional, Mevius, M., additional, Miley, G. K., additional, Morabito, L., additional, Morganti, R., additional, Nisbet, D., additional, Orrú, E., additional, Perkins, S., additional, Pizzo, R. F., additional, Schrijvers, C., additional, Smith, D. J. B., additional, Vermeulen, R., additional, Wise, M. W., additional, Alegre, L., additional, Bacon, D. J., additional, van Bemmel, I. M., additional, Beswick, R. J., additional, Bonafede, A., additional, Botteon, A., additional, Bourke, S., additional, Brienza, M., additional, Calistro Rivera, G., additional, Cassano, R., additional, Clarke, A. O., additional, Conselice, C. J., additional, Dettmar, R. J., additional, Drabent, A., additional, Dumba, C., additional, Emig, K. L., additional, Enßlin, T. A., additional, Ferrari, C., additional, Garrett, M. A., additional, Génova-Santos, R. T., additional, Goyal, A., additional, Gürkan, G., additional, Hale, C., additional, Harwood, J. J., additional, Heesen, V., additional, Hoeft, M., additional, Horellou, C., additional, Jackson, C., additional, Kokotanekov, G., additional, Kondapally, R., additional, Kunert-Bajraszewska, M., additional, Mahatma, V., additional, Mahony, E. K., additional, Mandal, S., additional, McKean, J. P., additional, Merloni, A., additional, Mingo, B., additional, Miskolczi, A., additional, Mooney, S., additional, Nikiel-Wroczyński, B., additional, O’Sullivan, S. P., additional, Quinn, J., additional, Reich, W., additional, Roskowiński, C., additional, Rowlinson, A., additional, Savini, F., additional, Saxena, A., additional, Schwarz, D. J., additional, Shulevski, A., additional, Sridhar, S. S., additional, Stacey, H. R., additional, Urquhart, S., additional, van der Wiel, M. H. D., additional, Varenius, E., additional, Webster, B., additional, and Wilber, A., additional

Published
2019
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9. LoTSS/HETDEX: Optical quasars

Author

Gürkan, Gülay, primary, Hardcastle, M. J., additional, Best, P. N., additional, Morabito, L. K., additional, Prandoni, I., additional, Jarvis, M. J., additional, Duncan, K. J., additional, Calistro Rivera, G., additional, Callingham, J. R., additional, Cochrane, R. K., additional, Croston, J. H., additional, Heald, G., additional, Mingo, B., additional, Mooney, S., additional, Sabater, J., additional, Röttgering, H. J. A., additional, Shimwell, T. W., additional, Smith, D. J. B., additional, Tasse, C., additional, and Williams, W. L., additional

Published
2019
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10. The LOFAR Two-metre Sky Survey

Author

Williams, W. L., primary, Hardcastle, M. J., additional, Best, P. N., additional, Sabater, J., additional, Croston, J. H., additional, Duncan, K. J., additional, Shimwell, T. W., additional, Röttgering, H. J. A., additional, Nisbet, D., additional, Gürkan, G., additional, Alegre, L., additional, Cochrane, R. K., additional, Goyal, A., additional, Hale, C. L., additional, Jackson, N., additional, Jamrozy, M., additional, Kondapally, R., additional, Kunert-Bajraszewska, M., additional, Mahatma, V. H., additional, Mingo, B., additional, Morabito, L. K., additional, Prandoni, I., additional, Roskowinski, C., additional, Shulevski, A., additional, Smith, D. J. B., additional, Tasse, C., additional, Urquhart, S., additional, Webster, B., additional, White, G. J., additional, Beswick, R. J., additional, Callingham, J. R., additional, Chyży, K. T., additional, de Gasperin, F., additional, Harwood, J. J., additional, Hoeft, M., additional, Iacobelli, M., additional, McKean, J. P., additional, Mechev, A. P., additional, Miley, G. K., additional, Schwarz, D. J., additional, and van Weeren, R. J., additional

Published
2019
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11. LoTSS DR1: Double-double radio galaxies in the HETDEX field

Author

Mahatma, V. H., primary, Hardcastle, M. J., additional, Williams, W. L., additional, Best, P. N., additional, Croston, J. H., additional, Duncan, K., additional, Mingo, B., additional, Morganti, R., additional, Brienza, M., additional, Cochrane, R. K., additional, Gürkan, G., additional, Harwood, J. J., additional, Jarvis, M. J., additional, Jamrozy, M., additional, Jurlin, N., additional, Morabito, L. K., additional, Röttgering, H. J. A., additional, Sabater, J., additional, Shimwell, T. W., additional, Smith, D. J. B., additional, Shulevski, A., additional, and Tasse, C., additional

Published
2019
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12. The LoTSS view of radio AGN in the local Universe

Author

Sabater, J., primary, Best, P. N., additional, Hardcastle, M. J., additional, Shimwell, T. W., additional, Tasse, C., additional, Williams, W. L., additional, Brüggen, M., additional, Cochrane, R. K., additional, Croston, J. H., additional, de Gasperin, F., additional, Duncan, K. J., additional, Gürkan, G., additional, Mechev, A. P., additional, Morabito, L. K., additional, Prandoni, I., additional, Röttgering, H. J. A., additional, Smith, D. J. B., additional, Harwood, J. J., additional, Mingo, B., additional, Mooney, S., additional, and Saxena, A., additional

Published
2019
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13. Radio-loud AGN in the first LoTSS data release

Author

Hardcastle, M. J., primary, Williams, W. L., additional, Best, P. N., additional, Croston, J. H., additional, Duncan, K. J., additional, Röttgering, H. J. A., additional, Sabater, J., additional, Shimwell, T. W., additional, Tasse, C., additional, Callingham, J. R., additional, Cochrane, R. K., additional, de Gasperin, F., additional, Gürkan, G., additional, Jarvis, M. J., additional, Mahatma, V., additional, Miley, G. K., additional, Mingo, B., additional, Mooney, S., additional, Morabito, L. K., additional, O’Sullivan, S. P., additional, Prandoni, I., additional, Shulevski, A., additional, and Smith, D. J. B., additional

Published
2019
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14. LOFAR MSSS: The scaling relation between AGN cavity power and radio luminosity at low radio frequencies

Author

Kokotanekov, G., primary, Wise, M., additional, Heald, G. H., additional, McKean, J. P., additional, Bîrzan, L., additional, Rafferty, D. A., additional, Godfrey, L. E. H., additional, de Vries, M., additional, Intema, H. T., additional, Broderick, J. W., additional, Hardcastle, M. J., additional, Bonafede, A., additional, Clarke, A. O., additional, van Weeren, R. J., additional, Röttgering, H. J. A., additional, Pizzo, R., additional, Iacobelli, M., additional, Orrú, E., additional, Shulevski, A., additional, Riseley, C. J., additional, Breton, R. P., additional, Nikiel-Wroczyński, B., additional, Sridhar, S. S., additional, Stewart, A. J., additional, Rowlinson, A., additional, van der Horst, A. J., additional, Harwood, J. J., additional, Gürkan, G., additional, Carbone, D., additional, Pandey-Pommier, M., additional, Tasse, C., additional, Scaife, A. M. M., additional, Pratley, L., additional, Ferrari, C., additional, Croston, J. H., additional, Pandey, V. N., additional, Jurusik, W., additional, and Mulcahy, D. D., additional

Published
2017
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15. LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group

Author

Clarke, A. O., primary, Heald, G., additional, Jarrett, T., additional, Bray, J. D., additional, Hardcastle, M. J., additional, Cantwell, T. M., additional, Scaife, A. M. M., additional, Brienza, M., additional, Bonafede, A., additional, Breton, R. P., additional, Broderick, J. W., additional, Carbone, D., additional, Croston, J. H., additional, Farnes, J. S., additional, Harwood, J. J., additional, Heesen, V., additional, Horneffer, A., additional, van der Horst, A. J., additional, Iacobelli, M., additional, Jurusik, W., additional, Kokotanekov, G., additional, McKean, J. P., additional, Morabito, L. K., additional, Mulcahy, D. D., additional, Nikiel-Wroczyñski, B. S., additional, Orrú, E., additional, Paladino, R., additional, Pandey-Pommier, M., additional, Pietka, M., additional, Pizzo, R., additional, Pratley, L., additional, Riseley, C. J., additional, Rottgering, H. J. A., additional, Rowlinson, A., additional, Sabater, J., additional, Sendlinger, K., additional, Shulevski, A., additional, Sridhar, S. S., additional, Stewart, A. J., additional, Tasse, C., additional, van Velzen, S., additional, van Weeren, R. J., additional, and Wise, M. W., additional

Published
2017
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17. Radiative age mapping of the remnant radio galaxy B2 0924+30: the LOFAR perspective.

Author

Shulevski, A., Morganti, R., Harwood, J. J., Barthel, P. D., Jamrozy, M., Brienza, M., Brunetti, G., Röttgering, H. J. A., Murgia, M., White, G. J., Croston, J. H., and Brüggen, M.

Subjects
RADIO galaxies, ACTIVE galactic nuclei, GALAXY spectra, SYNCHROTRON radiation, TELESCOPES
Abstract

We have observed the steep spectrum radio source B2 0924+30 using the LOw Frequency ARray (LOFAR) telescope. Hosted by a z = 0.026 elliptical galaxy, it has a relatively large angular size of 12' (corresponding to 360 kpc projected linear size) and a morphology reminiscent of a remnant Fanaroff-Riley type II (FRII) radio galaxy. Studying active galactic nuclei (AGN) radio remnants can give us insight into the time-scales involved into the episodic gas accretion by AGNs and their dependence on the AGN host environment. The proximity of the radio galaxy allows us to make detailed studies of its radio structure and map its spectral index and radiative age distribution. We combine LOFAR and archival images to study the spectral properties at a spatial resolution of 1'. We derive low frequency spectral index maps and use synchrotron ageing models to infer ages for different regions of the source. Thus, we are able to extend the spectral ageing studies into a hitherto unexplored frequency band, adding more robustness to our results. Our detailed spectral index mapping, while agreeing with earlier lower resolution studies, shows flattening of the spectral index towards the outer edges of the lobes. The spectral index of the lobes is α140609~ -1 and gradually steepens to α140609~ -1 moving towards the inner edges of the lobes. Using radiative ageing model fitting we show that the AGN activity ceased around 50 Myr ago. We note that the outer regions of the lobes are younger than the inner regions which is interpreted as a sign that those regions are remnant hotspots. We demonstrate the usefulness of maps of AGN radio remnants taken at low frequencies and suggest caution over the interpretation of spectral ages derived from integrated flux density measurements versus age mapping. The spectral index properties as well as the derived ages of B2 0924+30 are consistent with it being an FRII AGN radio remnant. LOFAR data are proving to be instrumental in extending our studies to the lowest radio frequencies and enabling analysis of the oldest source regions. [ABSTRACT FROM AUTHOR]

Published
2017
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18. M 87 at metre wavelengths: the LOFAR picture

Author

de Gasperin, F., primary, Orrú, E., additional, Murgia, M., additional, Merloni, A., additional, Falcke, H., additional, Beck, R., additional, Beswick, R., additional, Bîrzan, L., additional, Bonafede, A., additional, Brüggen, M., additional, Brunetti, G., additional, Chyży, K., additional, Conway, J., additional, Croston, J. H., additional, Enßlin, T., additional, Ferrari, C., additional, Heald, G., additional, Heidenreich, S., additional, Jackson, N., additional, Macario, G., additional, McKean, J., additional, Miley, G., additional, Morganti, R., additional, Offringa, A., additional, Pizzo, R., additional, Rafferty, D., additional, Röttgering, H., additional, Shulevski, A., additional, Steinmetz, M., additional, Tasse, C., additional, van der Tol, S., additional, van Driel, W., additional, van Weeren, R. J., additional, van Zwieten, J. E., additional, Alexov, A., additional, Anderson, J., additional, Asgekar, A., additional, Avruch, M., additional, Bell, M., additional, Bell, M. R., additional, Bentum, M., additional, Bernardi, G., additional, Best, P., additional, Breitling, F., additional, Broderick, J. W., additional, Butcher, A., additional, Ciardi, B., additional, Dettmar, R. J., additional, Eisloeffel, J., additional, Frieswijk, W., additional, Gankema, H., additional, Garrett, M., additional, Gerbers, M., additional, Griessmeier, J. M., additional, Gunst, A. W., additional, Hassall, T. E., additional, Hessels, J., additional, Hoeft, M., additional, Horneffer, A., additional, Karastergiou, A., additional, Köhler, J., additional, Koopman, Y., additional, Kuniyoshi, M., additional, Kuper, G., additional, Maat, P., additional, Mann, G., additional, Mevius, M., additional, Mulcahy, D. D., additional, Munk, H., additional, Nijboer, R., additional, Noordam, J., additional, Paas, H., additional, Pandey, M., additional, Pandey, V. N., additional, Polatidis, A., additional, Reich, W., additional, Schoenmakers, A. P., additional, Sluman, J., additional, Smirnov, O., additional, Sobey, C., additional, Stappers, B., additional, Swinbank, J., additional, Tagger, M., additional, Tang, Y., additional, van Bemmel, I., additional, van Cappellen, W., additional, van Duin, A. P., additional, van Haarlem, M., additional, van Leeuwen, J., additional, Vermeulen, R., additional, Vocks, C., additional, White, S., additional, Wise, M., additional, Wucknitz, O., additional, and Zarka, P., additional

Published
2012
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19. Discovery of the correspondence between intra-cluster radio emission and a high pressure region detected through the Sunyaev-Zel’dovich effect

Author

Ferrari, C., primary, Intema, H. T., additional, Orrù, E., additional, Govoni, F., additional, Murgia, M., additional, Mason, B., additional, Bourdin, H., additional, Asad, K. M., additional, Mazzotta, P., additional, Wise, M. W., additional, Mroczkowski, T., additional, and Croston, J. H., additional

Published
2011
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25. The representative XMM-Newton cluster structure survey (REXCESS) of an X-ray luminosity selected galaxy cluster sample

Author

Böhringer, H., primary, Schuecker, P., additional, Pratt, G. W., additional, Arnaud, M., additional, Ponman, T. J., additional, Croston, J. H., additional, Borgani, S., additional, Bower, R. G., additional, Briel, U. G., additional, Collins, C. A., additional, Donahue, M., additional, Forman, W. R., additional, Finoguenov, A., additional, Geller, M. J., additional, Guzzo, L., additional, Henry, J. P., additional, Kneissl, R., additional, Mohr, J. J., additional, Matsushita, K., additional, Mullis, C. R., additional, Ohashi, T., additional, Pedersen, K., additional, Pierini, D., additional, Quintana, H., additional, Raychaudhury, S., additional, Reiprich, T. H., additional, Romer, A. K., additional, Rosati, P., additional, Sabirli, K., additional, Temple, R. F., additional, Viana, P. T. P., additional, Vikhlinin, A., additional, Voit, G. M., additional, and Zhang, Y.-Y., additional

Published
2007
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28. The LOFAR Two-meter Sky Survey: Deep Fields Data Release 1

Author

K. C. Chambers, T. Ploeckinger, M. E. Huber, Rachel Cochrane, L. Wang, M. J. Rosenthal, Isabella Prandoni, A. Wo łowska, R. Kondapally, Rosita Paladino, B. Nikiel-Wroczy ński, Philip Best, H. J. A. R öttgering, Timothy W. Shimwell, Martin J. Hardcastle, E. A. Magnier, A. Shulevski, Kenneth Duncan, J. Sabater, V. H. Mahatma, Dominik J. Schwarz, J. H. Croston, Daniel J. Smith, Magdalena Kunert-Bajraszewska, I. McCheyne, D. Nisbet, R. I. J. Mostert, J. D. Wagenveld, Michael J. I. Brown, Matt J. Jarvis, Beatriz Mingo, Wendy L. Williams, S. P. OŚullivan, G. G ürkan, M. Brienza, Arti Goyal, Rebecca A. A. Bowler, M. A. Garrett, M. Br üggen, M. Bondi, M. Bonato, C. Tasse, Marek Jamrozy, Kondapally, R., Best, P. N., Hardcastle, M. J., Nisbet, D., Bonato, M., Sabater, J., Duncan, K. J., McCheyne, I., Cochrane, R. K., Bowler, R. A. A., Williams, W. L., Shimwell, T. W., Tasse, C., Croston, J. H., Goyal, A., Jamrozy, M., Jarvis, M. J., Mahatma, V. H., Röttgering, H. J. A., Smith, D. J. B., Wołowska, A., Bondi, M., Brienza, M., Brown, M. J. I., Brüggen, M., Chambers, K., Garrett, M. A., Gürkan, G., Huber, M., Kunert-Bajraszewska, M., Magnier, E., Mingo, B., Mostert, R., Nikiel-Wroczyński, B., O’Sullivan, S. P., Paladino, R., Ploeckinger, T., Prandoni, I., Rosenthal, M. J., Schwarz, D. J., Shulevski, A., Wagenveld, J. D., Wang, L., Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Astronomy

Subjects
catalog, Active galactic nucleus, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Photometry (optics), surveys, Astrophysics - Astrophysics of Galaxie, 0103 physical sciences, survey, Astrophysics - Cosmology and Nongalactic Astrophysic, education, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, media_common, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), radio continuum: galaxies, education.field_of_study, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, BOOTES, LOFAR, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, galaxies [radio continuum], Space and Planetary Science, Sky, Astrophysics of Galaxies (astro-ph.GA), radio continuum: galaxie, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - High Energy Astrophysical Phenomena, catalogs, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the source associations, cross-identifications, and multi-wavelength properties of the faint radio source population detected in the deep tier of the LOFAR Two Metre Sky Survey (LoTSS): the LoTSS Deep Fields. The first LoTSS Deep Fields data release consists of deep radio imaging at 150~MHz of the ELAIS-N1, Lockman Hole, and Bo\"{o}tes fields, down to RMS sensitives of around 20, 22, and 32$~\mu$Jy\,beam$^{-1}$, respectively. These fields are some of the best studied extra-galactic fields in the northern sky, with existing deep, wide-area panchromatic photometry from X-ray to infrared wavelengths, covering a total of $\approx$~26~\mbox{deg$^{2}$}. We first generated improved multi-wavelength catalogues in ELAIS-N1 and Lockman Hole; combined with the existing catalogue for Bo\"{o}tes, we present forced, matched aperture photometry for over 7.2 million sources across the three fields. We identified multi-wavelength counterparts to the radio detected sources, using a combination of the Likelihood Ratio method and visual classification, which greatly enhances the scientific potential of radio surveys and allows for the characterisation of the photometric redshifts and the physical properties of the host galaxies. The final radio-optical cross-matched catalogue consists of 81\,951 radio-detected sources, with counterparts identified and multi-wavelength properties presented for 79\,820 ($>$97\%) sources. We also examine the properties of the host galaxies, and through stacking analysis find that the radio population with no identified counterpart is likely dominated by AGN at $z\sim3-4$. This dataset contains one of the largest samples of radio-selected star-forming galaxies and active galactic nuclei (AGN) at these depths, making it ideal for studying the history of star-formation, and the evolution of galaxies and AGN across cosmic time., Comment: 34 pages, 14 figures and 14 tables. Accepted for publication in A&A special issue. This paper is part of the 1st data release of the LoTSS Deep Fields. Electronic data catalogues will be made available on journal publication

Published
2021

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