THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION

Ackermann M, Ajello M, Albert A, Allafort A, Atwood WB, Axelsson M, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bechtol K, Bellazzini R, Bissaldi E, Blandford RD, Bloom ED, Bogart JR, Bonamente E, Borgland AW, Bottacini E, Bouvier A, Brandt TJ, Bregeon J, Brigida M, Bruel P, Buehler R, Burnett TH, Buson S, Caliandro GA, Cameron RA, Caraveo PA, Casandjian JM, Cavazzuti E, Cecchi C, Celik O, Charles E, Chaves RCG, Chekhtman A, Cheung CC, Chiang J, Ciprini S, Claus R, Cohen-Tanugi J, Conrad J, Corbet R, Cutini S, D'Ammando F, Davis DS, De Angelis A, Deklotz M, De Palma F, Dermer CD, Digel SW, Do Couto E Silva E, Drell PS, Drlica-Wagner A, Dubois R, Favuzzi C, Fegan SJ, Ferrara EC, Focke WB, Fortin P, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Gehrels N, Giebels B, Giglietto N, Giordano F, Giroletti M, Glanzman T, Godfrey G, Grenier IA, Grove JE, Guiriec S, Hadasch D, Hayashida M, Hays E, Horan D, Hou X, Hughes RE, Jackson MS, Jogler T, Johannesson G, Johnson RP, Johnson TJ, Johnson WN, Kamae T, Katagiri H, Kataoka J, Kerr M, Knoedlseder J, Kuss M, Lande J, Larsson S, Latronico L, Lavalley C, Lemoine-Goumard M, Longo F, Loparco F, Lott B, Lovellette MN, Lubrano P, Mazziotta MN, Mcconville W, Mcenery JE, Mehault J, Michelson PF, Mitthumsiri W, Mizuno T, Moiseev AA, Monte C, Monzani ME, Morselli A, Moskalenko IV, Murgia S, Naumann-Godo M, Nemmen R, Nishino S, Norris JP, Nuss E, Ohno M, Ohsugi T, Okumura A, Omodei N, Orienti M, Orlando E, Ormes JF, Paneque D, Panetta JH, Perkins JS, Pesce-Rollins M, Pierbattista M, Piron F, Pivato G, Porter TA, Racusin JL, Raino S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Reposeur T, Reyes LC, Ritz S, Rochester LS, Romoli C, Roth M, Sadrozinski HFW, Sanchez DA, Parkinson PMS, Sbarra C, Scargle JD, Sgro C, Siegal-Gaskins J, Siskind EJ, Spandre G, Spinelli P, Stephens TE, Suson DJ, Tajima H, Takahashi HH, Tanaka T, Thayer JG, Thayer JB, Thompson DJ, Tibaldo L, Tinivella M, Tosti G, Troja E, Usher TL, Vandenbroucke J, Van Klaveren B, Vasileiou V, Vianello G, Vitale V, Waite AP, Wallace E, Winer BL, Wood DL, Wood KS, Wood M, Yang Z, Zimmer S (2012)

Publication Type: Journal article

Publication year: 2012

Journal

Book Volume: 203

Journal Issue: 1

DOI: 10.1088/0067-0049/203/1/4

Abstract

The Fermi Large Area Telescope (Fermi-LAT, hereafter LAT), the primary instrument on the Fermi Gamma-ray Space Telescope (Fermi) mission, is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering the energy range from 20 MeV to more than 300 GeV. During the first years of the mission, the LAT team has gained considerable insight into the in-flight performance of the instrument. Accordingly, we have updated the analysis used to reduce LAT data for public release as well as the instrument response functions (IRFs), the description of the instrument performance provided for data analysis. In this paper, we describe the effects that motivated these updates. Furthermore, we discuss how we originally derived IRFs from Monte Carlo simulations and later corrected those IRFs for discrepancies observed between flight and simulated data. We also give details of the validations performed using flight data and quantify the residual uncertainties in the IRFs. Finally, we describe techniques the LAT team has developed to propagate those uncertainties into estimates of the systematic errors on common measurements such as fluxes and spectra of astrophysical sources.

Authors with CRIS profile

Involved external institutions

Stockholm University / Stockholms universitet Sweden (SE) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) Stanford University United States (USA) (US) University of California Santa Cruz United States (USA) (US) University of Padua / Universita degli Studi di Padova Italy (IT) Deutsches Elektronen-Synchrotron DESY Germany (DE) Ohio State University United States (USA) (US) University of Pisa / Università di Pisa (UniPi) Italy (IT) Leopold-Franzens-Universität Innsbruck / University of Innsbruck Austria (AT) National Aeronautics and Space Administration (NASA) United States (USA) (US) University of Bari Aldo Moro / Università degli Studi di Bari Aldo Moro Italy (IT) École Polytechnique - Université Paris-Saclay France (FR) University of Washington United States (USA) (US) Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC) Spain (ES) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) Italy (IT) Italian Space Agency / Agenzia Spaziale Italiana (ASI) Italy (IT) George Mason University United States (USA) (US) National Academy of Sciences United States (USA) (US) Università degli Studi di Perugia Italy (IT) University of Montpellier / Université Montpellier France (FR) AlbaNova University Centre / Kungliga Tekniska Högskolan AlbaNova Universitetscentrum Sweden (SE) University of Udine / Università degli Studi di Udine Italy (IT) Stellar Solutions, Inc. United States (USA) (US) U.S. Naval Research Laboratory United States (USA) (US) Hiroshima University Japan (JP) Université Bordeaux 1, Sciences et Technologies France (FR) University of Iceland (UI) / Háskóli Íslands Iceland (IS) Ibaraki University / 茨城大学 Japan (JP) Waseda University / 早稲田大学 Japan (JP) Institut de Recherche en Astrophysique et Planétologie (IRAP) France (FR) Boise State University United States (USA) (US) Japan Aerospace eXploration Agency (JAXA) Japan (JP) University of Denver United States (USA) (US) California Polytechnic State University United States (USA) (US) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) California Institute of Technology (Caltech) United States (USA) (US) NYCB Real-Time Computing, Inc. United States (USA) (US) Purdue University Northwest / Purdue University Calumet United States (USA) (US) Praxis, Inc. United States (USA) (US)

How to cite

APA:

Ackermann, M., Ajello, M., Albert, A., Allafort, A., Atwood, W.B., Axelsson, M.,... Zimmer, S. (2012). THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION. Astrophysical Journal Supplement Series, 203(1). https://doi.org/10.1088/0067-0049/203/1/4

MLA:

Ackermann, Markus, et al. "THE FERMI LARGE AREA TELESCOPE ON ORBIT: EVENT CLASSIFICATION, INSTRUMENT RESPONSE FUNCTIONS, AND CALIBRATION." Astrophysical Journal Supplement Series 203.1 (2012).

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