A detailed study of the very high-energy Crab pulsar emission with the LST-1

Abe, K.; Abe, S.; Abhishek, A.; Acero, F.; Aguasca-Cabot, A.; Agudo, I.; Alvarez, Crespo; Antonelli, L.; Aramo, C.; Arbet-Engels, A.; Arcaro, C.; Artero, M.; Asano, K.; Aubert, P.; Baktash, A.; Bamba, A.; Baquero, Larriva; Baroncelli, L.; Barres, de; Barrio, J.; Batkovic, I.; Baxter, J.; Becerra, Gonzáilez; Bernardini, E.; Bernete, Medrano; Berti, A.; Bhattacharjee, P.; Bigongiari, C.; Bissaldi, E.; Blanch, O.; Bonnoli, G.; Bordas, P.; Brunelli, G.; Bulgarelli, A.; Burelli, I.; Burmistrov, L.; Buscemi, M.; Cardillo, M.; Caroff, S.; Carosi, A.; Carrasco, M.; Cassol, F.; Castrejón, N.; Cauz, D.; Cerasole, D.; Ceribella, G.; Chai, Y.; Cheng, K.; Chiavassa, A.; Chikawa, M.; Chon, G.; Chytka, L.; Cicciari, G.; Cifuentes, A.; Contreras, J.; Cortina, J.; Costantini, H.; Da, Vela; Dalchenko, M.; Dazzi, F.; De, Angelis; de, Bony; De, Lotto; de, Menezes; Del, Peral; Delgado, C.; Delgado, Mengual; della, Volpe; Dellaiera, M.; Di, Piano; Di, Pierro; Di, Tria; Di, Venere; Díaz, C.; Dominik, R.; Dominis, Prester; Donini, A.; Dorner, D.; Doro, M.; Eisenberger, L.; Elsässer, D.; Emery, G.; Escudero, J.; Fallah, Ramazani; Ferrarotto, F.; Fiasson, A.; Foffano, L.; Freixas, Coromina; Fröse, S.; Fukazawa, Y.; Garcia, López; Gasbarra, C.; Gasparrini, D.; Gavira, L.; Geyer, D.; Giesbrecht, Paiva; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinovic, N.; Grau, R.; Green, D.; Green, J.; Gunji, S.; Günther, P.; Hackfeld, J.; Hadasch, D.; Hahn, A.; Hassan, T.; Hayashi, K.; Heckmann, L.; Heller, M.; Herrera, Llorente; Hirotani, K.; Hoffmann, D.; Horns, D.; Houles, J.; Hrabovsky, M.; Hrupec, D.; Hui, D.; Iarlori, M.; Imazawa, R.; Inada, T.; Inome, Y.; Ioka, K.; Iori, M.; Jimenez, Martinez; Jiménez, Quiles; Jurysek, J.; Kagaya, M.; Karas, V.; Katagiri, H.; Kataoka, J.; Kerszberg, D.; Kobayashi, Y.; Kohri, K.; Kong, A.; Kubo, H.; Kushida, J.; Lainez, M.; Lamanna, G.; Lamastra, A.; Lemoigne, L.; Linhoff, M.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Lorini, A.; Lozano, Bahilo; Luque-Escamilla, P.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Mandat, D.; Manganaro, M.; Manicò, G.; Mannheim, K.; Marchesi, S.; Mariotti, M.; Marquez, P.; Marsella, G.; Martí, J.; Martinez, O.; Martínez, G.; Martínez, M.; Mas-Aguilar, A.; Maurin, G.; Mazin, D.; Mestre, Guillen; Micanovic, S.; Miceli, D.; Miener, T.; Miranda, J.; Mirzoyan, R.; Mizuno, T.; Molero, Gonzalez; Molina, E.; Montaruli, T.; Moralejo, A.; Morcuende, D.; Morselli, A.; Moya, V.; Muraishi, H.; Nagataki, S.; Nakamori, T.; Neronov, A.; Nickel, L.; Nievas, Rosillo; Nikolic, L.; Nishijima, K.; Noda, K.; Nosek, D.; Novotny, V.; Nozaki, S.; Ohishi, M.; Ohtani, Y.; Oka, T.; Okumura, A.; Orito, R.; Otero-Santos, J.; Ottanelli, P.; Owen, E.; Palatiello, M.; Paneque, D.; Pantaleo, F.; Paoletti, R.; Paredes, J.; Pech, M.; Pecimotika, M.; Peresano, M.; Pfeiffle, F.; Pietropaolo, E.; Pihet, M.; Pirola, G.; Plard, C.; Podobnik, F.; Pons, E.; Prandini, E.; Priyadarshi, C.; Prouza, M.; Rando, R.; Rhode, W.; Ribó, M.; Righi, C.; Rizi, V.; Rodriguez, Fernandez; Rodríguez, Frías; Saito, T.; Sakurai, S.; Sanchez, D.; Sano, H.; Šarić, T.; Sato, Y.; Saturni, F.; Savchenko, V.; Schiavone, F.; Schleicher, B.; Schmuckermaier, F.; Schubert, J.; Schussler, F.; Schweizer, T.; Seglar, Arroyo; Siegert, T.; Silvia, R.; Sitarek, J.; Sliusar, V.; Strišković, J.; Strzys, M.; Suda, Y.; Tajima, H.; Takahashi, H.; Takahashi, M.; Takata, J.; Takeishi, R.; Tam, P.; Tanaka, S.; Tateishi, D.; Tavernier, T.; Temnikov, P.; Terada, Y.; Terauchi, K.; Terzic, T.; Teshima, M.; Tluczykont, M.; Tokanai, F.; Torres, D.; Travnicek, P.; Truzzi, S.; Tutone, A.; Vacula, M.; Vallania, P.; van, Scherpenberg; Vázquez, Acosta; Verna, G.; Viale, I.; Vigliano, A.; Vigorito, C.; Visentin, E.; Vitale, V.; Voitsekhovskyi, V.; Voutsinas, G.; Vovk, I.; Vuillaume, T.; Walter, R.; Wan, L.; Will, M.; Yamamoto, T.; Yamazaki, R.; Yeung, P.; Yoshida, T.; Yoshikoshi, T.; Zhang, W.; Zywucka, N.
A detailed study of the very high-energy Crab pulsar emission with the LST-1

Abe, K.
Abe, S.
Abhishek, A.
Acero, F.
Aguasca-Cabot, A.
Agudo, I.
Alvarez, Crespo
Antonelli, L.
Aramo, C.
Arbet-Engels, A.
Arcaro, C.
Artero, M.
Asano, K.
Aubert, P.
Baktash, A.
Bamba, A.
Baquero, Larriva
Baroncelli, L.
Barres, de
Barrio, J.
Batkovic, I.
Baxter, J.
Becerra, Gonzáilez
Bernardini, E.
Bernete, Medrano
Berti, A.
Bhattacharjee, P.
Bigongiari, C.
Bissaldi, E.
Blanch, O.
Bonnoli, G.
Bordas, P.
Brunelli, G.
Bulgarelli, A.
Burelli, I.
Burmistrov, L.
Buscemi, M.
Cardillo, M.
Caroff, S.
Carosi, A.
Carrasco, M.
Cassol, F.
Castrejón, N.
Cauz, D.
Cerasole, D.
Ceribella, G.
Chai, Y.
Cheng, K.
Chiavassa, A.
Chikawa, M.
Chon, G.
Chytka, L.
Cicciari, G.
Cifuentes, A.
Contreras, J.
Cortina, J.
Costantini, H.
Da, Vela
Dalchenko, M.
Dazzi, F.
De, Angelis
de, Bony
De, Lotto
de, Menezes
Del, Peral
Delgado, C.
Delgado, Mengual
della, Volpe
Dellaiera, M.
Di, Piano
Di, Pierro
Di, Tria
Di, Venere
Díaz, C.
Dominik, R.
Dominis, Prester
Donini, A.
Dorner, D.
Doro, M.
Eisenberger, L.
Elsässer, D.
Emery, G.
Escudero, J.
Fallah, Ramazani
Ferrarotto, F.
Fiasson, A.
Foffano, L.
Freixas, Coromina
Fröse, S.
Fukazawa, Y.
Garcia, López
Gasbarra, C.
Gasparrini, D.
Gavira, L.
Geyer, D.
Giesbrecht, Paiva
Giglietto, N.
Giordano, F.
Gliwny, P.
Godinovic, N.
Grau, R.
Green, D.
Green, J.
Gunji, S.
Günther, P.
Hackfeld, J.
Hadasch, D.
Hahn, A.
Hassan, T.
Hayashi, K.
Heckmann, L.
Heller, M.
Herrera, Llorente
Hirotani, K.
Hoffmann, D.
Horns, D.
Houles, J.
Hrabovsky, M.
Hrupec, D.
Hui, D.
Iarlori, M.
Imazawa, R.
Inada, T.
Inome, Y.
Ioka, K.
Iori, M.
Jimenez, Martinez
Jiménez, Quiles
Jurysek, J.
Kagaya, M.
Karas, V.
Katagiri, H.
Kataoka, J.
Kerszberg, D.
Kobayashi, Y.
Kohri, K.
Kong, A.
Kubo, H.
Kushida, J.
Lainez, M.
Lamanna, G.
Lamastra, A.
Lemoigne, L.
Linhoff, M.
Longo, F.
López-Coto, R.
López-Moya, M.
López-Oramas, A.
Loporchio, S.
Lorini, A.
Lozano, Bahilo
Luque-Escamilla, P.
Majumdar, P.
Makariev, M.
Mallamaci, M.
Mandat, D.
Manganaro, M.
Manicò, G.
Mannheim, K.
Marchesi, S.
Mariotti, M.
Marquez, P.
Marsella, G.
Martí, J.
Martinez, O.
Martínez, G.
Martínez, M.
Mas-Aguilar, A.
Maurin, G.
Mazin, D.
Mestre, Guillen
Micanovic, S.
Miceli, D.
Miener, T.
Miranda, J.
Mirzoyan, R.
Mizuno, T.
Molero, Gonzalez
Molina, E.
Montaruli, T.
Moralejo, A.
Morcuende, D.
Morselli, A.
Moya, V.
Muraishi, H.
Nagataki, S.
Nakamori, T.
Neronov, A.
Nickel, L.
Nievas, Rosillo
Nikolic, L.
Nishijima, K.
Noda, K.
Nosek, D.
Novotny, V.
Nozaki, S.
Ohishi, M.
Ohtani, Y.
Oka, T.
Okumura, A.
Orito, R.
Otero-Santos, J.
Ottanelli, P.
Owen, E.
Palatiello, M.
Paneque, D.
Pantaleo, F.
Paoletti, R.
Paredes, J.
Pech, M.
Pecimotika, M.
Peresano, M.
Pfeiffle, F.
Pietropaolo, E.
Pihet, M.
Pirola, G.
Plard, C.
Podobnik, F.
Pons, E.
Prandini, E.
Priyadarshi, C.
Prouza, M.
Rando, R.
Rhode, W.
Ribó, M.
Righi, C.
Rizi, V.
Rodriguez, Fernandez
Rodríguez, Frías
Saito, T.
Sakurai, S.
Sanchez, D.
Sano, H.
Šarić, T.
Sato, Y.
Saturni, F.
Savchenko, V.
Schiavone, F.
Schleicher, B.
Schmuckermaier, F.
Schubert, J.
Schussler, F.
Schweizer, T.
Seglar, Arroyo
Siegert, T.
Silvia, R.
Sitarek, J.
Sliusar, V.
Strišković, J.
Strzys, M.
Suda, Y.
Tajima, H.
Takahashi, H.
Takahashi, M.
Takata, J.
Takeishi, R.
Tam, P.
Tanaka, S.
Tateishi, D.
Tavernier, T.
Temnikov, P.
Terada, Y.
Terauchi, K.
Terzic, T.
Teshima, M.
Tluczykont, M.
Tokanai, F.
Torres, D.
Travnicek, P.
Truzzi, S.
Tutone, A.
Vacula, M.
Vallania, P.
van, Scherpenberg
Vázquez, Acosta
Verna, G.
Viale, I.
Vigliano, A.
Vigorito, C.
Visentin, E.
Vitale, V.
Voitsekhovskyi, V.
Voutsinas, G.
Vovk, I.
Vuillaume, T.
Walter, R.
Wan, L.
Will, M.
Yamamoto, T.
Yamazaki, R.
Yeung, P.
Yoshida, T.
Yoshikoshi, T.
Zhang, W.
Zywucka, N.
Katso/Avaa
Lataukset: 

EDP Sciences
doi:10.1051/0004-6361/202450059
URI
http://doi.org/10.1051/0004-6361/202450059
Näytä kaikki kuvailutiedot
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2025082787229
Tiivistelmä

Context. To date, three pulsars have been firmly detected by imaging atmospheric Cherenkov telescopes (IACTs). Two of them reached the TeV energy range, challenging models of very high-energy (VHE) emission in pulsars. More precise observations are needed to better characterize pulsar emission at these energies. The LST-1 is the prototype of the large-sized telescopes, which will be part of the Cherenkov Telescope Array Observatory (CTAO). Its improved performance over previous IACTs makes it well suited for studying pulsars.

Aims. In this work we study the Crab pulsar emission with the LST-1, improving upon and complementing the results from other telescopes. Crab pulsar observations can also be used to characterize the potential of the LST-1 to study other pulsars and detect new ones.

Methods. We analyzed a total of ∼103 hours of gamma-ray observations of the Crab pulsar conducted with the LST-1 in the period from September 2020 to January 2023. The observations were carried out at zenith angles of less than 50 degrees. To characterize the Crab pulsar emission over a broader energy range, a new analysis of the Fermi/LAT data, including ∼14 years of observations, was also performed.

Results. The Crab pulsar phaseogram, long-term light curve, and phase-resolved spectra are reconstructed with the LST-1 from 20 GeV to 450 GeV for the first peak and up to 700 GeV for the second peak The pulsed emission is detected with a significance level of 15.2σ. The two characteristic emission peaks of the Crab pulsar are clearly detected (> 10σ), as is the so-called bridge emission between them (5.7σ). We find that both peaks are described well by power laws, with spectral indices of ∼3.44 and ∼3.03, respectively. The joint analysis of Fermi/LAT and LST-1 data shows a good agreement between the two instruments in their overlapping energy range. The detailed results obtained from the first observations of the Crab pulsar with the LST-1 show the potential that CTAO will have to study this type of source.

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