2FHL: The SECOND CATALOG of HARD FERMI-LAT SOURCES

M. Ackermann, M. Ajello, W. B. Atwood, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, J. Becerra Gonzalez, R. Bellazzini, E. Bissaldi, R. D. Blandford, E. D. Bloom, R. Bonino, E. Bottacini, T. J. Brandt, J. Bregeon, P. Bruel, R. Buehler, S. Buson, G. A. Caliandro & 134 others R. A. Cameron, R. Caputo, M. Caragiulo, P. A. Caraveo, E. Cavazzuti, C. Cecchi, E. Charles, A. Chekhtman, C. C. Cheung, J. Chiang, G. Chiaro, S. Ciprini, J. M. Cohen, J. Cohen-Tanugi, L. R. Cominsky, J. Conrad, A. Cuoco, S. Cutini, F. D'Ammando, A. De Angelis, F. De Palma, R. Desiante, M. Di Mauro, L. Di Venere, A. Domínguez, P. S. Drell, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, P. Fortin, A. Franckowiak, Y. Fukazawa, S. Funk, A. K. Furniss, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, I. A. Grenier, M. H. Grondin, L. Guillemot, S. Guiriec, A. K. Harding, E. Hays, J. W. Hewitt, A. B. Hill, D. Horan, G. Iafrate, Dieter Hartmann, T. Jogler, G. Jóhannesson, A. S. Johnson, T. Kamae, Jun Kataoka, J. Knödlseder, M. Kuss, G. La Mura, S. Larsson, L. Latronico, M. Lemoine-Goumard, J. Li, L. Li, F. Longo, F. Loparco, B. Lott, M. N. Lovellette, P. Lubrano, G. M. Madejski, S. Maldera, A. Manfreda, M. Mayer, M. N. Mazziotta, P. F. Michelson, N. Mirabal, W. Mitthumsiri, T. Mizuno, A. A. Moiseev, M. E. Monzani, A. Morselli, I. V. Moskalenko, S. Murgia, E. Nuss, T. Ohsugi, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, D. Paneque, J. S. Perkins, M. Pesce-Rollins, V. Petrosian, F. Piron, G. Pivato, T. A. Porter, S. Rainò, R. Rando, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, T. Reposeur, R. W. Romani, M. Sánchez-Conde, P. M Saz Parkinson, J. Schmid, A. Schulz, C. Sgrò, E. J. Siskind, F. Spada, G. Spandre, P. Spinelli, D. J. Suson, H. Tajima, H. Takahashi, M. Takahashi, T. Takahashi, J. B. Thayer, D. J. Thompson, L. Tibaldo, D. F. Torres, G. Tosti, E. Troja, G. Vianello, K. S. Wood, M. Wood, M. Yassine, G. Zaharijas, S. Zimmer

    Research output: Contribution to journal › Article

    154 Citations (Scopus)

    Abstract

    We present a catalog of sources detected above 50 GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass 8 event-level analysis allows the detection and characterization of sources in the 50 GeV-2 TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (∼1.′7 radius at 68% C. L.) and the detection and characterization of spatially extended sources. We find that 86% of the sources can be associated with counterparts at other wavelengths, of which the majority (75%) are active galactic nuclei and the rest (11%) are Galactic sources. Only 25% of the 2FHL sources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies by Cherenkov telescopes from the ground.

    Original languageEnglish
    Article number5
    JournalAstrophysical Journal, Supplement Series
    Volume222
    Issue number1
    DOIs
    Publication statusPublished - 2016 Jan 1

    Fingerprint

    telescopes
    energy
    catalogs
    point source
    angular resolution
    active galactic nuclei
    point sources
    wavelength
    energy bands
    orbits
    radii
    wavelengths
    detection

    Keywords

    • catalogs
    • gamma-rays: general

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Ackermann, M., Ajello, M., Atwood, W. B., Baldini, L., Ballet, J., Barbiellini, G., ... Zimmer, S. (2016). 2FHL: The SECOND CATALOG of HARD FERMI-LAT SOURCES. Astrophysical Journal, Supplement Series, 222(1), [5]. https://doi.org/10.3847/0067-0049/222/1/5

    2FHL : The SECOND CATALOG of HARD FERMI-LAT SOURCES. / Ackermann, M.; Ajello, M.; Atwood, W. B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Gonzalez, J. Becerra; Bellazzini, R.; Bissaldi, E.; Blandford, R. D.; Bloom, E. D.; Bonino, R.; Bottacini, E.; Brandt, T. J.; Bregeon, J.; Bruel, P.; Buehler, R.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caputo, R.; Caragiulo, M.; Caraveo, P. A.; Cavazzuti, E.; Cecchi, C.; Charles, E.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Chiaro, G.; Ciprini, S.; Cohen, J. M.; Cohen-Tanugi, J.; Cominsky, L. R.; Conrad, J.; Cuoco, A.; Cutini, S.; D'Ammando, F.; Angelis, A. De; Palma, F. De; Desiante, R.; Mauro, M. Di; Venere, L. Di; Domínguez, A.; Drell, P. S.; Favuzzi, C.; Fegan, S. J.; Ferrara, E. C.; Focke, W. B.; Fortin, P.; Franckowiak, A.; Fukazawa, Y.; Funk, S.; Furniss, A. K.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Grondin, M. H.; Guillemot, L.; Guiriec, S.; Harding, A. K.; Hays, E.; Hewitt, J. W.; Hill, A. B.; Horan, D.; Iafrate, G.; Hartmann, Dieter; Jogler, T.; Jóhannesson, G.; Johnson, A. S.; Kamae, T.; Kataoka, Jun; Knödlseder, J.; Kuss, M.; Mura, G. La; Larsson, S.; Latronico, L.; Lemoine-Goumard, M.; Li, J.; Li, L.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Maldera, S.; Manfreda, A.; Mayer, M.; Mazziotta, M. N.; Michelson, P. F.; Mirabal, N.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A. A.; Monzani, M. E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Nuss, E.; Ohsugi, T.; Omodei, N.; Orienti, M.; Orlando, E.; Ormes, J. F.; Paneque, D.; Perkins, J. S.; Pesce-Rollins, M.; Petrosian, V.; Piron, F.; Pivato, G.; Porter, T. A.; Rainò, S.; Rando, R.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reposeur, T.; Romani, R. W.; Sánchez-Conde, M.; Parkinson, P. M Saz; Schmid, J.; Schulz, A.; Sgrò, C.; Siskind, E. J.; Spada, F.; Spandre, G.; Spinelli, P.; Suson, D. J.; Tajima, H.; Takahashi, H.; Takahashi, M.; Takahashi, T.; Thayer, J. B.; Thompson, D. J.; Tibaldo, L.; Torres, D. F.; Tosti, G.; Troja, E.; Vianello, G.; Wood, K. S.; Wood, M.; Yassine, M.; Zaharijas, G.; Zimmer, S.

    In: Astrophysical Journal, Supplement Series, Vol. 222, No. 1, 5, 01.01.2016.

    Research output: Contribution to journal › Article

    Ackermann, M, Ajello, M, Atwood, WB, Baldini, L, Ballet, J, Barbiellini, G, Bastieri, D, Gonzalez, JB, Bellazzini, R, Bissaldi, E, Blandford, RD, Bloom, ED, Bonino, R, Bottacini, E, Brandt, TJ, Bregeon, J, Bruel, P, Buehler, R, Buson, S, Caliandro, GA, Cameron, RA, Caputo, R, Caragiulo, M, Caraveo, PA, Cavazzuti, E, Cecchi, C, Charles, E, Chekhtman, A, Cheung, CC, Chiang, J, Chiaro, G, Ciprini, S, Cohen, JM, Cohen-Tanugi, J, Cominsky, LR, Conrad, J, Cuoco, A, Cutini, S, D'Ammando, F, Angelis, AD, Palma, FD, Desiante, R, Mauro, MD, Venere, LD, Domínguez, A, Drell, PS, Favuzzi, C, Fegan, SJ, Ferrara, EC, Focke, WB, Fortin, P, Franckowiak, A, Fukazawa, Y, Funk, S, Furniss, AK, Fusco, P, Gargano, F, Gasparrini, D, Giglietto, N, Giommi, P, Giordano, F, Giroletti, M, Glanzman, T, Godfrey, G, Grenier, IA, Grondin, MH, Guillemot, L, Guiriec, S, Harding, AK, Hays, E, Hewitt, JW, Hill, AB, Horan, D, Iafrate, G, Hartmann, D, Jogler, T, Jóhannesson, G, Johnson, AS, Kamae, T, Kataoka, J, Knödlseder, J, Kuss, M, Mura, GL, Larsson, S, Latronico, L, Lemoine-Goumard, M, Li, J, Li, L, Longo, F, Loparco, F, Lott, B, Lovellette, MN, Lubrano, P, Madejski, GM, Maldera, S, Manfreda, A, Mayer, M, Mazziotta, MN, Michelson, PF, Mirabal, N, Mitthumsiri, W, Mizuno, T, Moiseev, AA, Monzani, ME, Morselli, A, Moskalenko, IV, Murgia, S, Nuss, E, Ohsugi, T, Omodei, N, Orienti, M, Orlando, E, Ormes, JF, Paneque, D, Perkins, JS, Pesce-Rollins, M, Petrosian, V, Piron, F, Pivato, G, Porter, TA, Rainò, S, Rando, R, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Reposeur, T, Romani, RW, Sánchez-Conde, M, Parkinson, PMS, Schmid, J, Schulz, A, Sgrò, C, Siskind, EJ, Spada, F, Spandre, G, Spinelli, P, Suson, DJ, Tajima, H, Takahashi, H, Takahashi, M, Takahashi, T, Thayer, JB, Thompson, DJ, Tibaldo, L, Torres, DF, Tosti, G, Troja, E, Vianello, G, Wood, KS, Wood, M, Yassine, M, Zaharijas, G & Zimmer, S 2016, '2FHL: The SECOND CATALOG of HARD FERMI-LAT SOURCES' Astrophysical Journal, Supplement Series, vol. 222, no. 1, 5. https://doi.org/10.3847/0067-0049/222/1/5
    Ackermann M, Ajello M, Atwood WB, Baldini L, Ballet J, Barbiellini G et al. 2FHL: The SECOND CATALOG of HARD FERMI-LAT SOURCES. Astrophysical Journal, Supplement Series. 2016 Jan 1;222(1). 5. https://doi.org/10.3847/0067-0049/222/1/5
    Ackermann, M. ; Ajello, M. ; Atwood, W. B. ; Baldini, L. ; Ballet, J. ; Barbiellini, G. ; Bastieri, D. ; Gonzalez, J. Becerra ; Bellazzini, R. ; Bissaldi, E. ; Blandford, R. D. ; Bloom, E. D. ; Bonino, R. ; Bottacini, E. ; Brandt, T. J. ; Bregeon, J. ; Bruel, P. ; Buehler, R. ; Buson, S. ; Caliandro, G. A. ; Cameron, R. A. ; Caputo, R. ; Caragiulo, M. ; Caraveo, P. A. ; Cavazzuti, E. ; Cecchi, C. ; Charles, E. ; Chekhtman, A. ; Cheung, C. C. ; Chiang, J. ; Chiaro, G. ; Ciprini, S. ; Cohen, J. M. ; Cohen-Tanugi, J. ; Cominsky, L. R. ; Conrad, J. ; Cuoco, A. ; Cutini, S. ; D'Ammando, F. ; Angelis, A. De ; Palma, F. De ; Desiante, R. ; Mauro, M. Di ; Venere, L. Di ; Domínguez, A. ; Drell, P. S. ; Favuzzi, C. ; Fegan, S. J. ; Ferrara, E. C. ; Focke, W. B. ; Fortin, P. ; Franckowiak, A. ; Fukazawa, Y. ; Funk, S. ; Furniss, A. K. ; Fusco, P. ; Gargano, F. ; Gasparrini, D. ; Giglietto, N. ; Giommi, P. ; Giordano, F. ; Giroletti, M. ; Glanzman, T. ; Godfrey, G. ; Grenier, I. A. ; Grondin, M. H. ; Guillemot, L. ; Guiriec, S. ; Harding, A. K. ; Hays, E. ; Hewitt, J. W. ; Hill, A. B. ; Horan, D. ; Iafrate, G. ; Hartmann, Dieter ; Jogler, T. ; Jóhannesson, G. ; Johnson, A. S. ; Kamae, T. ; Kataoka, Jun ; Knödlseder, J. ; Kuss, M. ; Mura, G. La ; Larsson, S. ; Latronico, L. ; Lemoine-Goumard, M. ; Li, J. ; Li, L. ; Longo, F. ; Loparco, F. ; Lott, B. ; Lovellette, M. N. ; Lubrano, P. ; Madejski, G. M. ; Maldera, S. ; Manfreda, A. ; Mayer, M. ; Mazziotta, M. N. ; Michelson, P. F. ; Mirabal, N. ; Mitthumsiri, W. ; Mizuno, T. ; Moiseev, A. A. ; Monzani, M. E. ; Morselli, A. ; Moskalenko, I. V. ; Murgia, S. ; Nuss, E. ; Ohsugi, T. ; Omodei, N. ; Orienti, M. ; Orlando, E. ; Ormes, J. F. ; Paneque, D. ; Perkins, J. S. ; Pesce-Rollins, M. ; Petrosian, V. ; Piron, F. ; Pivato, G. ; Porter, T. A. ; Rainò, S. ; Rando, R. ; Razzano, M. ; Razzaque, S. ; Reimer, A. ; Reimer, O. ; Reposeur, T. ; Romani, R. W. ; Sánchez-Conde, M. ; Parkinson, P. M Saz ; Schmid, J. ; Schulz, A. ; Sgrò, C. ; Siskind, E. J. ; Spada, F. ; Spandre, G. ; Spinelli, P. ; Suson, D. J. ; Tajima, H. ; Takahashi, H. ; Takahashi, M. ; Takahashi, T. ; Thayer, J. B. ; Thompson, D. J. ; Tibaldo, L. ; Torres, D. F. ; Tosti, G. ; Troja, E. ; Vianello, G. ; Wood, K. S. ; Wood, M. ; Yassine, M. ; Zaharijas, G. ; Zimmer, S. / 2FHL : The SECOND CATALOG of HARD FERMI-LAT SOURCES. In: Astrophysical Journal, Supplement Series. 2016 ; Vol. 222, No. 1.
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    abstract = "We present a catalog of sources detected above 50 GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass 8 event-level analysis allows the detection and characterization of sources in the 50 GeV-2 TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (∼1.′7 radius at 68{\%} C. L.) and the detection and characterization of spatially extended sources. We find that 86{\%} of the sources can be associated with counterparts at other wavelengths, of which the majority (75{\%}) are active galactic nuclei and the rest (11{\%}) are Galactic sources. Only 25{\%} of the 2FHL sources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies by Cherenkov telescopes from the ground.",
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    author = "M. Ackermann and M. Ajello and Atwood, {W. B.} and L. Baldini and J. Ballet and G. Barbiellini and D. Bastieri and Gonzalez, {J. Becerra} and R. Bellazzini and E. Bissaldi and Blandford, {R. D.} and Bloom, {E. D.} and R. Bonino and E. Bottacini and Brandt, {T. J.} and J. Bregeon and P. Bruel and R. Buehler and S. Buson and Caliandro, {G. A.} and Cameron, {R. A.} and R. Caputo and M. Caragiulo and Caraveo, {P. A.} and E. Cavazzuti and C. Cecchi and E. Charles and A. Chekhtman and Cheung, {C. C.} and J. Chiang and G. Chiaro and S. Ciprini and Cohen, {J. M.} and J. Cohen-Tanugi and Cominsky, {L. R.} and J. Conrad and A. Cuoco and S. Cutini and F. D'Ammando and Angelis, {A. De} and Palma, {F. De} and R. Desiante and Mauro, {M. Di} and Venere, {L. Di} and A. Dom{\'i}nguez and Drell, {P. S.} and C. Favuzzi and Fegan, {S. J.} and Ferrara, {E. C.} and Focke, {W. B.} and P. Fortin and A. Franckowiak and Y. Fukazawa and S. Funk and Furniss, {A. K.} and P. Fusco and F. Gargano and D. Gasparrini and N. Giglietto and P. Giommi and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and Grenier, {I. A.} and Grondin, {M. H.} and L. Guillemot and S. Guiriec and Harding, {A. K.} and E. Hays and Hewitt, {J. W.} and Hill, {A. B.} and D. Horan and G. Iafrate and Dieter Hartmann and T. Jogler and G. J{\'o}hannesson and Johnson, {A. S.} and T. Kamae and Jun Kataoka and J. Kn{\"o}dlseder and M. Kuss and Mura, {G. La} and S. Larsson and L. Latronico and M. Lemoine-Goumard and J. Li and L. Li and F. Longo and F. Loparco and B. Lott and Lovellette, {M. N.} and P. Lubrano and Madejski, {G. M.} and S. Maldera and A. Manfreda and M. Mayer and Mazziotta, {M. N.} and Michelson, {P. F.} and N. Mirabal and W. Mitthumsiri and T. Mizuno and Moiseev, {A. A.} and Monzani, {M. E.} and A. Morselli and Moskalenko, {I. V.} and S. Murgia and E. Nuss and T. Ohsugi and N. Omodei and M. Orienti and E. Orlando and Ormes, {J. F.} and D. Paneque and Perkins, {J. S.} and M. Pesce-Rollins and V. Petrosian and F. Piron and G. Pivato and Porter, {T. A.} and S. Rain{\`o} and R. Rando and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and T. Reposeur and Romani, {R. W.} and M. S{\'a}nchez-Conde and Parkinson, {P. M Saz} and J. Schmid and A. Schulz and C. Sgr{\`o} and Siskind, {E. J.} and F. Spada and G. Spandre and P. Spinelli and Suson, {D. J.} and H. Tajima and H. Takahashi and M. Takahashi and T. Takahashi and Thayer, {J. B.} and Thompson, {D. J.} and L. Tibaldo and Torres, {D. F.} and G. Tosti and E. Troja and G. Vianello and Wood, {K. S.} and M. Wood and M. Yassine and G. Zaharijas and S. Zimmer",
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    TY - JOUR

    T1 - 2FHL

    T2 - The SECOND CATALOG of HARD FERMI-LAT SOURCES

    AU - Ackermann, M.

    AU - Ajello, M.

    AU - Atwood, W. B.

    AU - Baldini, L.

    AU - Ballet, J.

    AU - Barbiellini, G.

    AU - Bastieri, D.

    AU - Gonzalez, J. Becerra

    AU - Bellazzini, R.

    AU - Bissaldi, E.

    AU - Blandford, R. D.

    AU - Bloom, E. D.

    AU - Bonino, R.

    AU - Bottacini, E.

    AU - Brandt, T. J.

    AU - Bregeon, J.

    AU - Bruel, P.

    AU - Buehler, R.

    AU - Buson, S.

    AU - Caliandro, G. A.

    AU - Cameron, R. A.

    AU - Caputo, R.

    AU - Caragiulo, M.

    AU - Caraveo, P. A.

    AU - Cavazzuti, E.

    AU - Cecchi, C.

    AU - Charles, E.

    AU - Chekhtman, A.

    AU - Cheung, C. C.

    AU - Chiang, J.

    AU - Chiaro, G.

    AU - Ciprini, S.

    AU - Cohen, J. M.

    AU - Cohen-Tanugi, J.

    AU - Cominsky, L. R.

    AU - Conrad, J.

    AU - Cuoco, A.

    AU - Cutini, S.

    AU - D'Ammando, F.

    AU - Angelis, A. De

    AU - Palma, F. De

    AU - Desiante, R.

    AU - Mauro, M. Di

    AU - Venere, L. Di

    AU - Domínguez, A.

    AU - Drell, P. S.

    AU - Favuzzi, C.

    AU - Fegan, S. J.

    AU - Ferrara, E. C.

    AU - Focke, W. B.

    AU - Fortin, P.

    AU - Franckowiak, A.

    AU - Fukazawa, Y.

    AU - Funk, S.

    AU - Furniss, A. K.

    AU - Fusco, P.

    AU - Gargano, F.

    AU - Gasparrini, D.

    AU - Giglietto, N.

    AU - Giommi, P.

    AU - Giordano, F.

    AU - Giroletti, M.

    AU - Glanzman, T.

    AU - Godfrey, G.

    AU - Grenier, I. A.

    AU - Grondin, M. H.

    AU - Guillemot, L.

    AU - Guiriec, S.

    AU - Harding, A. K.

    AU - Hays, E.

    AU - Hewitt, J. W.

    AU - Hill, A. B.

    AU - Horan, D.

    AU - Iafrate, G.

    AU - Hartmann, Dieter

    AU - Jogler, T.

    AU - Jóhannesson, G.

    AU - Johnson, A. S.

    AU - Kamae, T.

    AU - Kataoka, Jun

    AU - Knödlseder, J.

    AU - Kuss, M.

    AU - Mura, G. La

    AU - Larsson, S.

    AU - Latronico, L.

    AU - Lemoine-Goumard, M.

    AU - Li, J.

    AU - Li, L.

    AU - Longo, F.

    AU - Loparco, F.

    AU - Lott, B.

    AU - Lovellette, M. N.

    AU - Lubrano, P.

    AU - Madejski, G. M.

    AU - Maldera, S.

    AU - Manfreda, A.

    AU - Mayer, M.

    AU - Mazziotta, M. N.

    AU - Michelson, P. F.

    AU - Mirabal, N.

    AU - Mitthumsiri, W.

    AU - Mizuno, T.

    AU - Moiseev, A. A.

    AU - Monzani, M. E.

    AU - Morselli, A.

    AU - Moskalenko, I. V.

    AU - Murgia, S.

    AU - Nuss, E.

    AU - Ohsugi, T.

    AU - Omodei, N.

    AU - Orienti, M.

    AU - Orlando, E.

    AU - Ormes, J. F.

    AU - Paneque, D.

    AU - Perkins, J. S.

    AU - Pesce-Rollins, M.

    AU - Petrosian, V.

    AU - Piron, F.

    AU - Pivato, G.

    AU - Porter, T. A.

    AU - Rainò, S.

    AU - Rando, R.

    AU - Razzano, M.

    AU - Razzaque, S.

    AU - Reimer, A.

    AU - Reimer, O.

    AU - Reposeur, T.

    AU - Romani, R. W.

    AU - Sánchez-Conde, M.

    AU - Parkinson, P. M Saz

    AU - Schmid, J.

    AU - Schulz, A.

    AU - Sgrò, C.

    AU - Siskind, E. J.

    AU - Spada, F.

    AU - Spandre, G.

    AU - Spinelli, P.

    AU - Suson, D. J.

    AU - Tajima, H.

    AU - Takahashi, H.

    AU - Takahashi, M.

    AU - Takahashi, T.

    AU - Thayer, J. B.

    AU - Thompson, D. J.

    AU - Tibaldo, L.

    AU - Torres, D. F.

    AU - Tosti, G.

    AU - Troja, E.

    AU - Vianello, G.

    AU - Wood, K. S.

    AU - Wood, M.

    AU - Yassine, M.

    AU - Zaharijas, G.

    AU - Zimmer, S.

    PY - 2016/1/1

    Y1 - 2016/1/1

    N2 - We present a catalog of sources detected above 50 GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass 8 event-level analysis allows the detection and characterization of sources in the 50 GeV-2 TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (∼1.′7 radius at 68% C. L.) and the detection and characterization of spatially extended sources. We find that 86% of the sources can be associated with counterparts at other wavelengths, of which the majority (75%) are active galactic nuclei and the rest (11%) are Galactic sources. Only 25% of the 2FHL sources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies by Cherenkov telescopes from the ground.

    AB - We present a catalog of sources detected above 50 GeV by the Fermi-Large Area Telescope (LAT) in 80 months of data. The newly delivered Pass 8 event-level analysis allows the detection and characterization of sources in the 50 GeV-2 TeV energy range. In this energy band, Fermi-LAT has detected 360 sources, which constitute the second catalog of hard Fermi-LAT sources (2FHL). The improved angular resolution enables the precise localization of point sources (∼1.′7 radius at 68% C. L.) and the detection and characterization of spatially extended sources. We find that 86% of the sources can be associated with counterparts at other wavelengths, of which the majority (75%) are active galactic nuclei and the rest (11%) are Galactic sources. Only 25% of the 2FHL sources have been previously detected by Cherenkov telescopes, implying that the 2FHL provides a reservoir of candidates to be followed up at very high energies. This work closes the energy gap between the observations performed at GeV energies by Fermi-LAT on orbit and the observations performed at higher energies by Cherenkov telescopes from the ground.

    KW - catalogs

    KW - gamma-rays: general

    UR - http://www.scopus.com/inward/record.url?scp=84955482407&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84955482407&partnerID=8YFLogxK

    U2 - 10.3847/0067-0049/222/1/5

    DO - 10.3847/0067-0049/222/1/5

    M3 - Article

    VL - 222

    JO - Astrophysical Journal, Supplement Series

    JF - Astrophysical Journal, Supplement Series

    SN - 0067-0049

    IS - 1

    M1 - 5

    ER -

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