Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

A. U. Abeysekara; W. Benbow; R. Bird; A. Brill; R. Brose; J. H. Buckley; A. J. Chromey; M. K. Daniel; A. Falcone; J. P. Finley; L. Fortson; A. Furniss; A. Gent; G. H. Gillanders; D. Hanna; T. Hassan; O. Hervet; J. Holder; G. Hughes; T. B. Humensky; P. Kaaret; P. Kar; M. Kertzman; D. Kieda; M. Krause; F. Krennrich; S. Kumar; M. J. Lang; T. T.Y. Lin; G. Maier; P. Moriarty; R. Mukherjee; S. O'Brien; R. A. Ong; A. N. Otte; N. Park; A. Petrashyk; M. Pohl; E. Pueschel; J. Quinn; K. Ragan; G. T. Richards; E. Roache; I. Sadeh; M. Santander; S. Schlenstedt; G. H. Sembroski; I. Sushch; J. Tyler; V. V. Vassiliev; S. P. Wakely; A. Weinstein; R. M. Wells; P. Wilcox; A. Wilhelm; D. A. Williams; T. J. Williamson; B. Zitzer; V. A. Acciari; S. Ansoldi; L. A. Antonelli; A. Arbet Engels; D. Baack; A. Babić; B. Banerjee; U. Barres De Almeida; J. A. Barrio; J. Becerra González; W. Bednarek; E. Bernardini; A. Berti; J. Besenrieder; W. Bhattacharyya; C. Bigongiari; A. Biland; O. Blanch; G. Bonnoli; G. Busetto; R. Carosi; G. Ceribella; S. Cikota; S. M. Colak; P. Colin; E. Colombo; J. L. Contreras; J. Cortina; S. Covino; V. D'Elia; P. Da Vela; F. Dazzi; A. De Angelis; B. De Lotto; M. Delfino; J. Delgado; F. Di Pierro; E. Do Souto Espinera; A. Dominguez; D. Dominis Prester; D. Dorner; M. Doro; S. Einecke; D. Elsaesser; V. Fallah Ramazani; A. Fattorini; A. Fernández-Barral; G. Ferrara; D. Fidalgo; L. Foffano; M. V. Fonseca; L. Font; C. Fruck; D. Galindo; S. Gallozzi; R. J.Garcia López; M. Garczarczyk; S. Gasparyan; M. Gaug; P. Giammaria; N. Godinović; D. Guberman; D. Hadasch; A. Hahn; J. Herrera; J. Hoang; D. Hrupec; S. Inoue; K. Ishio; Y. Iwamura; H. Kubo; J. Kushida; D. Kuveždić; A. Lamastra; D. Lelas; F. Leone; E. Lindfors; S. Lombardi; F. Longo; M. López; A. López-Oramas; B. Machado De Oliveira Fraga; C. Maggio; P. Majumdar; M. Makariev; M. Mallamaci; G. Maneva; M. Manganaro; K. Mannheim; L. Maraschi; M. Mariotti; M. Martinez; S. Masuda; D. Mazin; M. Minev; J. M. Miranda; R. Mirzoyan; E. Molina; A. Moralejo; V. Moreno; E. Moretti; P. Munar-Adrover; V. Neustroev; A. Niedzwiecki; M. Nievas Rosillo; C. Nigro; K. Nilsson; D. Ninci; K. Nishijima; K. Noda; L. Nogués; M. Nöthe; S. Paiano; J. Palacio; D. Paneque; R. Paoletti; J. M. Paredes; G. Pedaletti; P. Penil; M. Peresano; M. Persic; P. G.Prada Moroni; E. Prandini; I. Puljak; J. R. Garcia; W. Rhode; M. Ribó; J. Rico; C. Righi; A. Rugliancich; L. Saha; N. Sahakyan; T. Saito; K. Satalecka; T. Schweizer; J. Sitarek; I. Šnidarić; D. Sobczynska; A. Somero; A. Stamerra; M. Strzys; T. Surić; F. Tavecchio; P. Temnikov; T. Terzić; M. Teshima; N. Torres-Alba; S. Tsujimoto; J. Van Scherpenberg; G. Vanzo; M. Vazquez Acosta; I. Vovk; M. Will; D. Zarić

doi:10.3847/2041-8213/aae70e

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

A. U. Abeysekara, W. Benbow, R. Bird, A. Brill, R. Brose, J. H. Buckley, A. J. Chromey, M. K. Daniel, A. Falcone, J. P. Finley, L. Fortson, A. Furniss, A. Gent, G. H. Gillanders, D. Hanna, T. Hassan, O. Hervet, J. Holder, G. Hughes, T. B. HumenskyP. Kaaret, P. Kar, M. Kertzman, D. Kieda, M. Krause, F. Krennrich, S. Kumar, M. J. Lang, T. T.Y. Lin, G. Maier, P. Moriarty, R. Mukherjee, S. O'Brien, R. A. Ong, A. N. Otte, N. Park, A. Petrashyk, M. Pohl, E. Pueschel, J. Quinn, K. Ragan, G. T. Richards, E. Roache, I. Sadeh, M. Santander, S. Schlenstedt, G. H. Sembroski, I. Sushch, J. Tyler, V. V. Vassiliev, S. P. Wakely, A. Weinstein, R. M. Wells, P. Wilcox, A. Wilhelm, D. A. Williams, T. J. Williamson, B. Zitzer, V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, D. Baack, A. Babić, B. Banerjee, U. Barres De Almeida, J. A. Barrio, J. Becerra González, W. Bednarek, E. Bernardini, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, G. Busetto, R. Carosi, G. Ceribella, S. Cikota, S. M. Colak, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, V. D'Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, F. Di Pierro, E. Do Souto Espinera, A. Dominguez, D. Dominis Prester, D. Dorner, M. Doro, S. Einecke, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, A. Fernández-Barral, G. Ferrara, D. Fidalgo, L. Foffano, M. V. Fonseca, L. Font, C. Fruck, D. Galindo, S. Gallozzi, R. J.Garcia López, M. Garczarczyk, S. Gasparyan, M. Gaug, P. Giammaria, N. Godinović, D. Guberman, D. Hadasch, A. Hahn, J. Herrera, J. Hoang, D. Hrupec, S. Inoue, K. Ishio, Y. Iwamura, H. Kubo, J. Kushida, D. Kuveždić, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, M. López, A. López-Oramas, B. Machado De Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martinez, S. Masuda, D. Mazin, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, V. Moreno, E. Moretti, P. Munar-Adrover, V. Neustroev, A. Niedzwiecki, M. Nievas Rosillo, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, L. Nogués, M. Nöthe, S. Paiano, J. Palacio, D. Paneque, R. Paoletti, J. M. Paredes, G. Pedaletti, P. Penil, M. Peresano, M. Persic, P. G.Prada Moroni, E. Prandini, I. Puljak, J. R. Garcia, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, K. Satalecka, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Somero, A. Stamerra, M. Strzys, T. Surić, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, N. Torres-Alba, S. Tsujimoto, J. Van Scherpenberg, G. Vanzo, M. Vazquez Acosta, I. Vovk, M. Will, D. Zarić

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between and with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around . This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.

Original language	English (US)
Article number	L19
Journal	Astrophysical Journal Letters
Volume	867
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/aae70e
State	Published - Nov 1 2018

Bibliographical note

Funding Information:
VERITAS is supported by the U.S. Department of Energy, the U.S. National Science Foundation, the Smithsonian Institution, and by NSERC in Canada. We acknowledge the excellent work of the support staff at the Fred Lawrence Whipple Observatory and at collaborating institutions in the construction and operation of VERITAS.

Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved.

Keywords

X-rays: binaries
gamma rays: general
pulsars: individual (PSR J2032+4127, VER J2032+414, MAGIC J2032 +4127)
stars: individual (MT91 213)

Publisher link

10.3847/2041-8213/aae70e

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Abeysekara, A. U., Benbow, W., Bird, R., Brill, A., Brose, R., Buckley, J. H., Chromey, A. J., Daniel, M. K., Falcone, A., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Gillanders, G. H., Hanna, D., Hassan, T., Hervet, O., Holder, J., Hughes, G., ... Zarić, D. (2018). Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period. Astrophysical Journal Letters, 867(1), [L19]. https://doi.org/10.3847/2041-8213/aae70e

Abeysekara, AU, Benbow, W, Bird, R, Brill, A, Brose, R, Buckley, JH, Chromey, AJ, Daniel, MK, Falcone, A, Finley, JP, Fortson, L, Furniss, A, Gent, A, Gillanders, GH, Hanna, D, Hassan, T, Hervet, O, Holder, J, Hughes, G, Humensky, TB, Kaaret, P, Kar, P, Kertzman, M, Kieda, D, Krause, M, Krennrich, F, Kumar, S, Lang, MJ, Lin, TTY, Maier, G, Moriarty, P, Mukherjee, R, O'Brien, S, Ong, RA, Otte, AN, Park, N, Petrashyk, A, Pohl, M, Pueschel, E, Quinn, J, Ragan, K, Richards, GT, Roache, E, Sadeh, I, Santander, M, Schlenstedt, S, Sembroski, GH, Sushch, I, Tyler, J, Vassiliev, VV, Wakely, SP, Weinstein, A, Wells, RM, Wilcox, P, Wilhelm, A, Williams, DA, Williamson, TJ, Zitzer, B, Acciari, VA, Ansoldi, S, Antonelli, LA, Engels, AA, Baack, D, Babić, A, Banerjee, B, De Almeida, UB, Barrio, JA, González, JB, Bednarek, W, Bernardini, E, Berti, A, Besenrieder, J, Bhattacharyya, W, Bigongiari, C, Biland, A, Blanch, O, Bonnoli, G, Busetto, G, Carosi, R, Ceribella, G, Cikota, S, Colak, SM, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Covino, S, D'Elia, V, Vela, PD, Dazzi, F, Angelis, AD, Lotto, BD, Delfino, M, Delgado, J, Pierro, FD, Souto Espinera, ED, Dominguez, A, Prester, DD, Dorner, D, Doro, M, Einecke, S, Elsaesser, D, Ramazani, VF, Fattorini, A, Fernández-Barral, A, Ferrara, G, Fidalgo, D, Foffano, L, Fonseca, MV, Font, L, Fruck, C, Galindo, D, Gallozzi, S, López, RJG, Garczarczyk, M, Gasparyan, S, Gaug, M, Giammaria, P, Godinović, N, Guberman, D, Hadasch, D, Hahn, A, Herrera, J, Hoang, J, Hrupec, D, Inoue, S, Ishio, K, Iwamura, Y, Kubo, H, Kushida, J, Kuveždić, D, Lamastra, A, Lelas, D, Leone, F, Lindfors, E, Lombardi, S, Longo, F, López, M, López-Oramas, A, De Oliveira Fraga, BM, Maggio, C, Majumdar, P, Makariev, M, Mallamaci, M, Maneva, G, Manganaro, M, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Masuda, S, Mazin, D, Minev, M, Miranda, JM, Mirzoyan, R, Molina, E, Moralejo, A, Moreno, V, Moretti, E, Munar-Adrover, P, Neustroev, V, Niedzwiecki, A, Rosillo, MN, Nigro, C, Nilsson, K, Ninci, D, Nishijima, K, Noda, K, Nogués, L, Nöthe, M, Paiano, S, Palacio, J, Paneque, D, Paoletti, R, Paredes, JM, Pedaletti, G, Penil, P, Peresano, M, Persic, M, Moroni, PGP, Prandini, E, Puljak, I, Garcia, JR, Rhode, W, Ribó, M, Rico, J, Righi, C, Rugliancich, A, Saha, L, Sahakyan, N, Saito, T, Satalecka, K, Schweizer, T, Sitarek, J, Šnidarić, I, Sobczynska, D, Somero, A, Stamerra, A, Strzys, M, Surić, T, Tavecchio, F, Temnikov, P, Terzić, T, Teshima, M, Torres-Alba, N, Tsujimoto, S, Scherpenberg, JV, Vanzo, G, Acosta, MV, Vovk, I, Will, M & Zarić, D 2018, 'Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period', Astrophysical Journal Letters, vol. 867, no. 1, L19. https://doi.org/10.3847/2041-8213/aae70e

@article{9b27f3d3b953422cad3d37ea1541ec92,

title = "Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period",

abstract = "We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between and with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around . This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.",

keywords = "X-rays: binaries, gamma rays: general, pulsars: individual (PSR J2032+4127, VER J2032+414, MAGIC J2032 +4127), stars: individual (MT91 213)",

author = "Abeysekara, {A. U.} and W. Benbow and R. Bird and A. Brill and R. Brose and Buckley, {J. H.} and Chromey, {A. J.} and Daniel, {M. K.} and A. Falcone and Finley, {J. P.} and L. Fortson and A. Furniss and A. Gent and Gillanders, {G. H.} and D. Hanna and T. Hassan and O. Hervet and J. Holder and G. Hughes and Humensky, {T. B.} and P. Kaaret and P. Kar and M. Kertzman and D. Kieda and M. Krause and F. Krennrich and S. Kumar and Lang, {M. J.} and Lin, {T. T.Y.} and G. Maier and P. Moriarty and R. Mukherjee and S. O'Brien and Ong, {R. A.} and Otte, {A. N.} and N. Park and A. Petrashyk and M. Pohl and E. Pueschel and J. Quinn and K. Ragan and Richards, {G. T.} and E. Roache and I. Sadeh and M. Santander and S. Schlenstedt and Sembroski, {G. H.} and I. Sushch and J. Tyler and Vassiliev, {V. V.} and Wakely, {S. P.} and A. Weinstein and Wells, {R. M.} and P. Wilcox and A. Wilhelm and Williams, {D. A.} and Williamson, {T. J.} and B. Zitzer and Acciari, {V. A.} and S. Ansoldi and Antonelli, {L. A.} and Engels, {A. Arbet} and D. Baack and A. Babi{\'c} and B. Banerjee and {De Almeida}, {U. Barres} and Barrio, {J. A.} and Gonz{\'a}lez, {J. Becerra} and W. Bednarek and E. Bernardini and A. Berti and J. Besenrieder and W. Bhattacharyya and C. Bigongiari and A. Biland and O. Blanch and G. Bonnoli and G. Busetto and R. Carosi and G. Ceribella and S. Cikota and Colak, {S. M.} and P. Colin and E. Colombo and Contreras, {J. L.} and J. Cortina and S. Covino and V. D'Elia and Vela, {P. Da} and F. Dazzi and Angelis, {A. De} and Lotto, {B. De} and M. Delfino and J. Delgado and Pierro, {F. Di} and {Souto Espinera}, {E. Do} and A. Dominguez and Prester, {D. Dominis} and D. Dorner and M. Doro and S. Einecke and D. Elsaesser and Ramazani, {V. Fallah} and A. Fattorini and A. Fern{\'a}ndez-Barral and G. Ferrara and D. Fidalgo and L. Foffano and Fonseca, {M. V.} and L. Font and C. Fruck and D. Galindo and S. Gallozzi and L{\'o}pez, {R. J.Garcia} and M. Garczarczyk and S. Gasparyan and M. Gaug and P. Giammaria and N. Godinovi{\'c} and D. Guberman and D. Hadasch and A. Hahn and J. Herrera and J. Hoang and D. Hrupec and S. Inoue and K. Ishio and Y. Iwamura and H. Kubo and J. Kushida and D. Kuve{\v z}di{\'c} and A. Lamastra and D. Lelas and F. Leone and E. Lindfors and S. Lombardi and F. Longo and M. L{\'o}pez and A. L{\'o}pez-Oramas and {De Oliveira Fraga}, {B. Machado} and C. Maggio and P. Majumdar and M. Makariev and M. Mallamaci and G. Maneva and M. Manganaro and K. Mannheim and L. Maraschi and M. Mariotti and M. Martinez and S. Masuda and D. Mazin and M. Minev and Miranda, {J. M.} and R. Mirzoyan and E. Molina and A. Moralejo and V. Moreno and E. Moretti and P. Munar-Adrover and V. Neustroev and A. Niedzwiecki and Rosillo, {M. Nievas} and C. Nigro and K. Nilsson and D. Ninci and K. Nishijima and K. Noda and L. Nogu{\'e}s and M. N{\"o}the and S. Paiano and J. Palacio and D. Paneque and R. Paoletti and Paredes, {J. M.} and G. Pedaletti and P. Penil and M. Peresano and M. Persic and Moroni, {P. G.Prada} and E. Prandini and I. Puljak and Garcia, {J. R.} and W. Rhode and M. Rib{\'o} and J. Rico and C. Righi and A. Rugliancich and L. Saha and N. Sahakyan and T. Saito and K. Satalecka and T. Schweizer and J. Sitarek and I. {\v S}nidari{\'c} and D. Sobczynska and A. Somero and A. Stamerra and M. Strzys and T. Suri{\'c} and F. Tavecchio and P. Temnikov and T. Terzi{\'c} and M. Teshima and N. Torres-Alba and S. Tsujimoto and Scherpenberg, {J. Van} and G. Vanzo and Acosta, {M. Vazquez} and I. Vovk and M. Will and D. Zari{\'c}",

note = "Funding Information: VERITAS is supported by the U.S. Department of Energy, the U.S. National Science Foundation, the Smithsonian Institution, and by NSERC in Canada. We acknowledge the excellent work of the support staff at the Fred Lawrence Whipple Observatory and at collaborating institutions in the construction and operation of VERITAS. Publisher Copyright: {\textcopyright} 2018. The American Astronomical Society. All rights reserved.",

year = "2018",

month = nov,

day = "1",

doi = "10.3847/2041-8213/aae70e",

language = "English (US)",

volume = "867",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

AU - Abeysekara, A. U.

AU - Benbow, W.

AU - Bird, R.

AU - Brill, A.

AU - Brose, R.

AU - Buckley, J. H.

AU - Chromey, A. J.

AU - Daniel, M. K.

AU - Falcone, A.

AU - Finley, J. P.

AU - Fortson, L.

AU - Furniss, A.

AU - Gent, A.

AU - Gillanders, G. H.

AU - Hanna, D.

AU - Hassan, T.

AU - Hervet, O.

AU - Holder, J.

AU - Hughes, G.

AU - Humensky, T. B.

AU - Kaaret, P.

AU - Kar, P.

AU - Kertzman, M.

AU - Kieda, D.

AU - Krause, M.

AU - Krennrich, F.

AU - Kumar, S.

AU - Lang, M. J.

AU - Lin, T. T.Y.

AU - Maier, G.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - O'Brien, S.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Petrashyk, A.

AU - Pohl, M.

AU - Pueschel, E.

AU - Quinn, J.

AU - Ragan, K.

AU - Richards, G. T.

AU - Roache, E.

AU - Sadeh, I.

AU - Santander, M.

AU - Schlenstedt, S.

AU - Sembroski, G. H.

AU - Sushch, I.

AU - Tyler, J.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Weinstein, A.

AU - Wells, R. M.

AU - Wilcox, P.

AU - Wilhelm, A.

AU - Williams, D. A.

AU - Williamson, T. J.

AU - Zitzer, B.

AU - Acciari, V. A.

AU - Ansoldi, S.

AU - Antonelli, L. A.

AU - Engels, A. Arbet

AU - Baack, D.

AU - Babić, A.

AU - Banerjee, B.

AU - De Almeida, U. Barres

AU - Barrio, J. A.

AU - González, J. Becerra

AU - Bednarek, W.

AU - Bernardini, E.

AU - Berti, A.

AU - Besenrieder, J.

AU - Bhattacharyya, W.

AU - Bigongiari, C.

AU - Biland, A.

AU - Blanch, O.

AU - Bonnoli, G.

AU - Busetto, G.

AU - Carosi, R.

AU - Ceribella, G.

AU - Cikota, S.

AU - Colak, S. M.

AU - Colin, P.

AU - Colombo, E.

AU - Contreras, J. L.

AU - Cortina, J.

AU - Covino, S.

AU - D'Elia, V.

AU - Vela, P. Da

AU - Dazzi, F.

AU - Angelis, A. De

AU - Lotto, B. De

AU - Delfino, M.

AU - Delgado, J.

AU - Pierro, F. Di

AU - Souto Espinera, E. Do

AU - Dominguez, A.

AU - Prester, D. Dominis

AU - Dorner, D.

AU - Doro, M.

AU - Einecke, S.

AU - Elsaesser, D.

AU - Ramazani, V. Fallah

AU - Fattorini, A.

AU - Fernández-Barral, A.

AU - Ferrara, G.

AU - Fidalgo, D.

AU - Foffano, L.

AU - Fonseca, M. V.

AU - Font, L.

AU - Fruck, C.

AU - Galindo, D.

AU - Gallozzi, S.

AU - López, R. J.Garcia

AU - Garczarczyk, M.

AU - Gasparyan, S.

AU - Gaug, M.

AU - Giammaria, P.

AU - Godinović, N.

AU - Guberman, D.

AU - Hadasch, D.

AU - Hahn, A.

AU - Herrera, J.

AU - Hoang, J.

AU - Hrupec, D.

AU - Inoue, S.

AU - Ishio, K.

AU - Iwamura, Y.

AU - Kubo, H.

AU - Kushida, J.

AU - Kuveždić, D.

AU - Lamastra, A.

AU - Lelas, D.

AU - Leone, F.

AU - Lindfors, E.

AU - Lombardi, S.

AU - Longo, F.

AU - López, M.

AU - López-Oramas, A.

AU - De Oliveira Fraga, B. Machado

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N1 - Funding Information: VERITAS is supported by the U.S. Department of Energy, the U.S. National Science Foundation, the Smithsonian Institution, and by NSERC in Canada. We acknowledge the excellent work of the support staff at the Fred Lawrence Whipple Observatory and at collaborating institutions in the construction and operation of VERITAS. Publisher Copyright: © 2018. The American Astronomical Society. All rights reserved.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between and with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around . This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.

AB - We report on observations of the pulsar/Be star binary system PSR J2032+4127/MT91 213 in the energy range between and with the Very Energetic Radiation Imaging Telescope Array and Major Atmospheric Gamma Imaging Cherenkov telescope arrays. The binary orbit has a period of approximately 50 years, with the most recent periastron occurring on 2017 November 13. Our observations span from 18 months prior to periastron to one month after. A new point-like gamma-ray source is detected, coincident with the location of PSR J2032+4127/MT91 213. The gamma-ray light curve and spectrum are well characterized over the periastron passage. The flux is variable over at least an order of magnitude, peaking at periastron, thus providing a firm association of the TeV source with the pulsar/Be star system. Observations prior to periastron show a cutoff in the spectrum at an energy around . This result adds a new member to the small population of known TeV binaries, and it identifies only the second source of this class in which the nature and properties of the compact object are firmly established. We compare the gamma-ray results with the light curve measured with the X-ray Telescope on board the Neil Gehrels Swift Observatory and with the predictions of recent theoretical models of the system. We conclude that significant revision of the models is required to explain the details of the emission that we have observed, and we discuss the relationship between the binary system and the overlapping steady extended source, TeV J2032+4130.

KW - X-rays: binaries

KW - gamma rays: general

KW - pulsars: individual (PSR J2032+4127, VER J2032+414, MAGIC J2032 +4127)

KW - stars: individual (MT91 213)

UR - http://www.scopus.com/inward/record.url?scp=85056105475&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056105475&partnerID=8YFLogxK

U2 - 10.3847/2041-8213/aae70e

DO - 10.3847/2041-8213/aae70e

M3 - Article

AN - SCOPUS:85056105475

SN - 2041-8205

VL - 867

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L19

ER -

Periastron Observations of TeV Gamma-Ray Emission from a Binary System with a 50-year Period

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