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Main Authors: Collaboration, H. E. S. S., Aharonian, F., Benkhali, F. Ait, Aschersleben, J., Ashkar, H., Backes, M., Martins, V. Barbosa, Batzofin, R., Becherini, Y., Berge, D., Bernlöhr, K., Böttcher, M., Boisson, C., Bolmont, J., de Lavergne, M. de Bony, Borowska, J., Bouyahiaoui, M., Bradascio, F., Brose, R., Brown, A., Brun, F., Bruno, B., Bulik, T., Burger-Scheidlin, C., Bylund, T., Casanova, S., Celic, J., Cerruti, M., Chand, T., Chandra, S., Chen, A., Chibueze, J., Chibueze, O., Cotter, G., Cristofari, P., Mbarubucyeye, J. Damascene, Davids, I. D., Devin, J., Djuvsland, J., Dmytriiev, A., Egberts, K., Einecke, S., Fegan, S., Fontaine, G., Funk, S., Gabici, S., Glicenstein, J. F., Glombitza, J., Goswami, P., Grolleron, G., Haerer, L., Heß, B., Hinton, J. A., Hofmann, W., Holch, T. L., Holler, M., Horns, D., Huang, Zhiqiu, Jamrozy, M., Jankowsky, F., Jardin-Blicq, A., Kasai, E., Katarzyński, K., Khatoon, R., Khélifi, B., Komin, Nu., Kosack, K., Kostunin, D., Kundu, A., Lang, R. G., Stum, S. Le, Lemière, A., Lemoine-Goumard, M., Lenain, J. -P., Leuschner, F., Luashvili, A., Mackey, J., Malyshev, D., Marandon, V., Martí-Devesa, G., Marx, R., Mehta, A., Mitchell, A., Moderski, R., Mohrmann, L., Montanari, A., de Naurois, M., Niemiec, J., O'Brien, P., Olivera-Nieto, L., Wilhelmi, E. de Ona, Ostrowski, M., Panny, S., Panter, M., Pensec, U., Pühlhofer, G., Punch, M., Quirrenbach, A., Ravikularaman, S., Regeard, M., Reimer, A., Reimer, O., Reis, I., Ren, H., Reville, B., Rieger, F., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Salzmann, H., Sanchez, D. A., Santangelo, A., Sasaki, M., Schäfer, J., Schüssler, F., Shapopi, J. N. S., Sharma, A., Sol, H., Spencer, S., Stawarz, Ł., Steenkamp, R., Steinmassl, S., Steppa, C., Suzuki, H., Takahashi, T., Tanaka, T., Taylor, A. M., Terrier, R., Thakur, A., Tsirou, M., van Eldik, C., Vecchi, M., Venter, C., Vink, J., Völk, H. J., Wach, T., Wagner, S. J., Wierzcholska, A., Zacharias, M., Zdziarski, A. A., Zech, A., Żywucka, N.
Format: Preprint
Published: 2025
Subjects:
High Energy Astrophysical Phenomena
Online Access:https://arxiv.org/abs/2504.21221
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author Collaboration, H. E. S. S.
Aharonian, F.
Benkhali, F. Ait
Aschersleben, J.
Ashkar, H.
Backes, M.
Martins, V. Barbosa
Batzofin, R.
Becherini, Y.
Berge, D.
Bernlöhr, K.
Böttcher, M.
Boisson, C.
Bolmont, J.
de Lavergne, M. de Bony
Borowska, J.
Bouyahiaoui, M.
Bradascio, F.
Brose, R.
Brown, A.
Brun, F.
Bruno, B.
Bulik, T.
Burger-Scheidlin, C.
Bylund, T.
Casanova, S.
Celic, J.
Cerruti, M.
Chand, T.
Chandra, S.
Chen, A.
Chibueze, J.
Chibueze, O.
Cotter, G.
Cristofari, P.
Mbarubucyeye, J. Damascene
Davids, I. D.
Devin, J.
Djuvsland, J.
Dmytriiev, A.
Egberts, K.
Einecke, S.
Fegan, S.
Fontaine, G.
Funk, S.
Gabici, S.
Glicenstein, J. F.
Glombitza, J.
Goswami, P.
Grolleron, G.
Haerer, L.
Heß, B.
Hinton, J. A.
Hofmann, W.
Holch, T. L.
Holler, M.
Horns, D.
Huang, Zhiqiu
Jamrozy, M.
Jankowsky, F.
Jardin-Blicq, A.
Kasai, E.
Katarzyński, K.
Khatoon, R.
Khélifi, B.
Komin, Nu.
Kosack, K.
Kostunin, D.
Kundu, A.
Lang, R. G.
Stum, S. Le
Lemière, A.
Lemoine-Goumard, M.
Lenain, J. -P.
Leuschner, F.
Luashvili, A.
Mackey, J.
Malyshev, D.
Marandon, V.
Martí-Devesa, G.
Marx, R.
Mehta, A.
Mitchell, A.
Moderski, R.
Mohrmann, L.
Montanari, A.
de Naurois, M.
Niemiec, J.
O'Brien, P.
Olivera-Nieto, L.
Wilhelmi, E. de Ona
Ostrowski, M.
Panny, S.
Panter, M.
Pensec, U.
Pühlhofer, G.
Punch, M.
Quirrenbach, A.
Ravikularaman, S.
Regeard, M.
Reimer, A.
Reimer, O.
Reis, I.
Ren, H.
Reville, B.
Rieger, F.
Rowell, G.
Rudak, B.
Ruiz-Velasco, E.
Sahakian, V.
Salzmann, H.
Sanchez, D. A.
Santangelo, A.
Sasaki, M.
Schäfer, J.
Schüssler, F.
Shapopi, J. N. S.
Sharma, A.
Sol, H.
Spencer, S.
Stawarz, Ł.
Steenkamp, R.
Steinmassl, S.
Steppa, C.
Suzuki, H.
Takahashi, T.
Tanaka, T.
Taylor, A. M.
Terrier, R.
Thakur, A.
Tsirou, M.
van Eldik, C.
Vecchi, M.
Venter, C.
Vink, J.
Völk, H. J.
Wach, T.
Wagner, S. J.
Wierzcholska, A.
Zacharias, M.
Zdziarski, A. A.
Zech, A.
Żywucka, N.
author_facet Collaboration, H. E. S. S.
Aharonian, F.
Benkhali, F. Ait
Aschersleben, J.
Ashkar, H.
Backes, M.
Martins, V. Barbosa
Batzofin, R.
Becherini, Y.
Berge, D.
Bernlöhr, K.
Böttcher, M.
Boisson, C.
Bolmont, J.
de Lavergne, M. de Bony
Borowska, J.
Bouyahiaoui, M.
Bradascio, F.
Brose, R.
Brown, A.
Brun, F.
Bruno, B.
Bulik, T.
Burger-Scheidlin, C.
Bylund, T.
Casanova, S.
Celic, J.
Cerruti, M.
Chand, T.
Chandra, S.
Chen, A.
Chibueze, J.
Chibueze, O.
Cotter, G.
Cristofari, P.
Mbarubucyeye, J. Damascene
Davids, I. D.
Devin, J.
Djuvsland, J.
Dmytriiev, A.
Egberts, K.
Einecke, S.
Fegan, S.
Fontaine, G.
Funk, S.
Gabici, S.
Glicenstein, J. F.
Glombitza, J.
Goswami, P.
Grolleron, G.
Haerer, L.
Heß, B.
Hinton, J. A.
Hofmann, W.
Holch, T. L.
Holler, M.
Horns, D.
Huang, Zhiqiu
Jamrozy, M.
Jankowsky, F.
Jardin-Blicq, A.
Kasai, E.
Katarzyński, K.
Khatoon, R.
Khélifi, B.
Komin, Nu.
Kosack, K.
Kostunin, D.
Kundu, A.
Lang, R. G.
Stum, S. Le
Lemière, A.
Lemoine-Goumard, M.
Lenain, J. -P.
Leuschner, F.
Luashvili, A.
Mackey, J.
Malyshev, D.
Marandon, V.
Martí-Devesa, G.
Marx, R.
Mehta, A.
Mitchell, A.
Moderski, R.
Mohrmann, L.
Montanari, A.
de Naurois, M.
Niemiec, J.
O'Brien, P.
Olivera-Nieto, L.
Wilhelmi, E. de Ona
Ostrowski, M.
Panny, S.
Panter, M.
Pensec, U.
Pühlhofer, G.
Punch, M.
Quirrenbach, A.
Ravikularaman, S.
Regeard, M.
Reimer, A.
Reimer, O.
Reis, I.
Ren, H.
Reville, B.
Rieger, F.
Rowell, G.
Rudak, B.
Ruiz-Velasco, E.
Sahakian, V.
Salzmann, H.
Sanchez, D. A.
Santangelo, A.
Sasaki, M.
Schäfer, J.
Schüssler, F.
Shapopi, J. N. S.
Sharma, A.
Sol, H.
Spencer, S.
Stawarz, Ł.
Steenkamp, R.
Steinmassl, S.
Steppa, C.
Suzuki, H.
Takahashi, T.
Tanaka, T.
Taylor, A. M.
Terrier, R.
Thakur, A.
Tsirou, M.
van Eldik, C.
Vecchi, M.
Venter, C.
Vink, J.
Völk, H. J.
Wach, T.
Wagner, S. J.
Wierzcholska, A.
Zacharias, M.
Zdziarski, A. A.
Zech, A.
Żywucka, N.
contents The results of the first extragalactic gamma-ray survey by the High Energy Stereoscopic System (H.E.S.S.) are presented. The survey comprises 2720 hours of very high-energy gamma-ray observations of the extragalactic sky, recorded with H.E.S.S. from 2004 up to the end of 2012. These data have been re-analysed using a common consistent set of up-to-date data calibration and analysis tools. From this analysis, a list of 23 detected objects, predominantly blazars, was obtained. This catalogue was assessed in terms of the source class populations that it contains. The level of source parameter bias for the blazar sources, probed by this observational dataset, was evaluated using Monte-Carlo simulations. Spectral results obtained with the H.E.S.S. data were compared with the \textit{Fermi}-LAT catalogues to present the full gamma-ray picture of the detected objects. Lastly, this unique dataset was used to assess the contribution of BL Lacertae objects and flat-spectrum radio quasars to the extragalactic gamma-ray background light at several hundreds of giga-electronvolts. These results are accompanied by the release of the high-level data to the astrophysical community.
format Preprint
id arxiv_https___arxiv_org_abs_2504_21221
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle The H.E.S.S. extragalactic sky survey with the first decade of observations
Collaboration, H. E. S. S.
Aharonian, F.
Benkhali, F. Ait
Aschersleben, J.
Ashkar, H.
Backes, M.
Martins, V. Barbosa
Batzofin, R.
Becherini, Y.
Berge, D.
Bernlöhr, K.
Böttcher, M.
Boisson, C.
Bolmont, J.
de Lavergne, M. de Bony
Borowska, J.
Bouyahiaoui, M.
Bradascio, F.
Brose, R.
Brown, A.
Brun, F.
Bruno, B.
Bulik, T.
Burger-Scheidlin, C.
Bylund, T.
Casanova, S.
Celic, J.
Cerruti, M.
Chand, T.
Chandra, S.
Chen, A.
Chibueze, J.
Chibueze, O.
Cotter, G.
Cristofari, P.
Mbarubucyeye, J. Damascene
Davids, I. D.
Devin, J.
Djuvsland, J.
Dmytriiev, A.
Egberts, K.
Einecke, S.
Fegan, S.
Fontaine, G.
Funk, S.
Gabici, S.
Glicenstein, J. F.
Glombitza, J.
Goswami, P.
Grolleron, G.
Haerer, L.
Heß, B.
Hinton, J. A.
Hofmann, W.
Holch, T. L.
Holler, M.
Horns, D.
Huang, Zhiqiu
Jamrozy, M.
Jankowsky, F.
Jardin-Blicq, A.
Kasai, E.
Katarzyński, K.
Khatoon, R.
Khélifi, B.
Komin, Nu.
Kosack, K.
Kostunin, D.
Kundu, A.
Lang, R. G.
Stum, S. Le
Lemière, A.
Lemoine-Goumard, M.
Lenain, J. -P.
Leuschner, F.
Luashvili, A.
Mackey, J.
Malyshev, D.
Marandon, V.
Martí-Devesa, G.
Marx, R.
Mehta, A.
Mitchell, A.
Moderski, R.
Mohrmann, L.
Montanari, A.
de Naurois, M.
Niemiec, J.
O'Brien, P.
Olivera-Nieto, L.
Wilhelmi, E. de Ona
Ostrowski, M.
Panny, S.
Panter, M.
Pensec, U.
Pühlhofer, G.
Punch, M.
Quirrenbach, A.
Ravikularaman, S.
Regeard, M.
Reimer, A.
Reimer, O.
Reis, I.
Ren, H.
Reville, B.
Rieger, F.
Rowell, G.
Rudak, B.
Ruiz-Velasco, E.
Sahakian, V.
Salzmann, H.
Sanchez, D. A.
Santangelo, A.
Sasaki, M.
Schäfer, J.
Schüssler, F.
Shapopi, J. N. S.
Sharma, A.
Sol, H.
Spencer, S.
Stawarz, Ł.
Steenkamp, R.
Steinmassl, S.
Steppa, C.
Suzuki, H.
Takahashi, T.
Tanaka, T.
Taylor, A. M.
Terrier, R.
Thakur, A.
Tsirou, M.
van Eldik, C.
Vecchi, M.
Venter, C.
Vink, J.
Völk, H. J.
Wach, T.
Wagner, S. J.
Wierzcholska, A.
Zacharias, M.
Zdziarski, A. A.
Zech, A.
Żywucka, N.
High Energy Astrophysical Phenomena
The results of the first extragalactic gamma-ray survey by the High Energy Stereoscopic System (H.E.S.S.) are presented. The survey comprises 2720 hours of very high-energy gamma-ray observations of the extragalactic sky, recorded with H.E.S.S. from 2004 up to the end of 2012. These data have been re-analysed using a common consistent set of up-to-date data calibration and analysis tools. From this analysis, a list of 23 detected objects, predominantly blazars, was obtained. This catalogue was assessed in terms of the source class populations that it contains. The level of source parameter bias for the blazar sources, probed by this observational dataset, was evaluated using Monte-Carlo simulations. Spectral results obtained with the H.E.S.S. data were compared with the \textit{Fermi}-LAT catalogues to present the full gamma-ray picture of the detected objects. Lastly, this unique dataset was used to assess the contribution of BL Lacertae objects and flat-spectrum radio quasars to the extragalactic gamma-ray background light at several hundreds of giga-electronvolts. These results are accompanied by the release of the high-level data to the astrophysical community.
title The H.E.S.S. extragalactic sky survey with the first decade of observations
topic High Energy Astrophysical Phenomena
url https://arxiv.org/abs/2504.21221

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