Pass 8: Toward the Full Realization of the Fermi-LAT Scientific Potential

Abstract

The event selection developed for the Fermi Large Area Telescope before launch has been periodically updated to reflect the constantly improving knowledge of the detector and the environment in which it operates. Pass 7, released to the public in August 2011, represents the most recent major iteration of this incremental process. In parallel, the LAT team has undertaken a coherent long-term effort aimed at a radical revision of the entire event-level analysis, based on the experience gained in the prime phase of the mission. This includes virtually every aspect of the data reduction process, from the simulation of the detector to the event reconstruction and the background rejection. The potential improvements include (but are not limited to) a significant reduction in background contamination coupled with an increased effective area, a better point-spread function, a better understanding of the systematic uncertainties and an extension of the energy reach for the photon analysis below 100 MeV and above a few hundred GeV. We present an overview of the work that has been done or is ongoing and the prospects for the near future.

6 pages, 1 figure, 2012 Fermi Symposium proceedings - eConf C121028

Cited by in corpus (110)

• The Fermi Galactic Center GeV Excess and Implications for Dark Matter
• 3FHL: The Third Catalog of Hard Fermi-LAT Sources
• A very-high-energy component deep in the Gamma-ray Burst afterglow
• The 1st Fermi Lat Supernova Remnant Catalog
• A decade of Gamma-Ray Bursts observed by $Fermi$-LAT: The 2${}^{nd}$ GRB catalog
• Search for gamma-ray emission from the Coma Cluster with six years of Fermi-LAT data
• Observations of M31 and M33 with the Fermi Large Area Telescope: a galactic center excess in Andromeda?
• The Einstein@Home Gamma-ray Pulsar Survey. I. Search Methods, Sensitivity and Discovery of New Young Gamma-ray Pulsars
• Gamma-ray observations of Tycho's SNR with VERITAS and Fermi
• Gamma-ray Blazars Within the First 2 Billion Years
• Fermi-LAT Observations of the LIGO event GW150914
• Fermi Large Area Telescope Performance After 10 Years Of Operation
• 3FGL Demographics Outside the Galactic Plane using Supervised Machine Learning: Pulsar and Dark Matter Subhalo Interpretations
• The most powerful flaring activity from the NLSy1 PMN J0948+0022
• New Constraints on all flavour Galactic diffuse neutrino emission with the ANTARES telescope
• Discovery of the Ultra-high energy gamma-ray source LHAASO J2108+5157
• Discovery of Gamma-ray Pulsations from the Transitional Redback PSR J1227-4853
• Leptonic and Hadronic Modeling of Fermi-LAT Hard Spectrum Quasars and Predictions for High-Energy Polarization
• Possible Quasi-Periodic modulation in the z = 1.1 $\gamma$-ray blazar PKS 0426-380
• Multiwavelength observations of the blazar BL Lacertae: a new fast TeV gamma-ray flare
• Realistic estimation for the detectability of dark matter sub-halos with Fermi-LAT
• Broadband Observations of High Redshift Blazars
• BAT AGN Spectroscopic Survey: XVI. General Physical Characteristics of BAT Blazars
• A Fast Very High Energy $\gamma$-ray Flare from BL Lacertae during a Period of Multiwavelength activity in June 2015
• The first catalog of Fermi-LAT sources below 100 MeV
• NGC 3894: a young radio galaxy seen by Fermi-LAT
• Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
• Searching for spectral oscillations due to photon-axionlike particle conversion using the Fermi-LAT observations of bright supernova remnants
• Detection of two TeV shell-type remnants at GeV energies with Fermi-LAT: HESS J1731-347 and SN 1006
• The Braking Index of a Radio-quiet Gamma-ray Pulsar
• Evidence for PeV Proton Acceleration from Fermi-LAT Observations of SNR G106.3+2.7
• Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013-2017
• Gamma-ray observations of low-luminosity active galactic nuclei
• VHE gamma-ray detection of FSRQ QSO B1420+326 and modeling of its enhanced broadband state in 2020
• Design and expected performance of a novel hybrid detector for very-high-energy gamma astrophysics
• The ever-surprising blazar OJ 287: multi-wavelength study and appearance of a new component in X-rays
• The Fermi LAT detection of magnetar-like pulsar PSR J1846-0258 at high-energy gamma-rays
• Locating the gamma-ray emission region in the brightest Fermi-LAT Flat Spectrum Radio Quasars
• Light curve and SED modeling of the gamma-ray binary 1FGL J1018.6$-$5856: constraints on the orbital geometry and relativistic flow
• The awakening of the gamma-ray narrow-Line Seyfert 1 galaxy PKS 1502+036
• PSR J1906+0722: An Elusive Gamma-ray Pulsar
• Theoretical predictions for dark matter detection in dwarf irregular galaxies with gamma rays
• Searching for the possible signal of the photon-axionlike particle oscillation in the combined GeV and TeV spectra of supernova remnants
• Disentangling multiple high-energy emission components in the Vela X pulsar wind nebula with the Fermi Large Area Telescope
• Variability and Spectral Characteristics of Three Flaring Gamma-ray Quasars Observed by VERITAS and Fermi-LAT
• Six Faint Gamma-ray Pulsars Seen with the Fermi Large Area Telescope -- Towards a Sample Blending into the Background
• The GBT 350-MHz Drift Scan Pulsar Survey. III. Detection of a magnetic field in the eclipsing material of PSR J2256-1024
• Signatures of Intra-binary shock emission in the black widow pulsar binary PSR J2241-5236
• Milky Way globular clusters in gamma-rays: analyzing the dynamical formation of millisecond pulsars
• Optical, X-ray, and $\gamma$-ray observations of the candidate transitional millisecond pulsar 4FGL J0427.8-6704
• Spherical Cows in Dark Matter Indirect Detection
• Separating astrophysical sources from indirect dark matter signals
• High-Energy Non-Thermal and Thermal Emission from GRB141207A detected by Fermi
• X-ray to gamma-ray virial shock signal from the Coma cluster
• Multi-scale time- and frequency-domain likelihood analysis with photon weights
• SED constraints on the highest-$z$ blazar jet: QSO J0906+6930
• A deep learning method for the trajectory reconstruction of cosmic rays with the DAMPE mission
• HESS J1640-465 -- a Gamma-ray emitting pulsar wind nebula ?
• Extreme & High Synchrotron Peaked Blazars at the limit of Fermi-LAT detectability: the $\gamma$-ray spectrum of 1BIGB sources
• Characterising the signatures of star-forming galaxies in the extra-galactic $\gamma$-ray background
• Probing the hadronic nature of the gamma-ray emission associated with Westerlund 2
• A delayed 400 GeV photon from GRB 221009A and implication on the intergalactic magnetic field
• Limits on Dark Matter annihilation cross sections to gamma-ray lines with subhalo distribution in N-body simulation and Fermi LAT data
• The MHz-peaked radio spectrum of the unusual gamma-ray source PMN J1603-4904
• Search for GeV Gamma-Ray Emission from SPT-SZ selected Galaxy Clusters with 15 years of Fermi-LAT data
• Detection of Gamma-Rays from the Protostellar Jet in the HH 80-81 System
• New pulsars detected in gamma-rays with the Fermi-LAT
• MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources
• Searches for correlation between UHECR events and high-energy gamma-ray Fermi-LAT data
• Timing of Pulsars in the Globular Cluster Omega Centauri
• Search for the Gamma-ray Emission from M33 with Fermi LAT
• Fermi/LAT detection of a transient gamma-ray flare in the vicinity of the binary star DG CVn
• Radio VLBA polarization and multi-band monitoring of the high-redshift quasar S5 0836+710 during a high activity period
• Fermi-LAT high $z$ AGN and the Extragalactic Background Light
• Improved binary solution for the gamma-ray binary 1FGL J1018.6-5856
• Search for GeV flare coincident with the IceCube neutrino flare
• A tale of cosmic rays narrated in gamma rays by Fermi
• Extracting the gamma-ray source-count distribution below the Fermi-LAT detection limit with deep learning
• Modeling the multiwavelength emission from G73.9+0.9: Gamma-rays from a SNR-MC interaction
• How the dynamical properties of globular clusters impact their $\gamma$-ray and X-ray emission
• Search of the Earth Limb Fermi Data and Non-Galactic Center Region Fermi Data for Signs of Narrow Lines
• Search for Dark Matter Annihilation to gamma-rays from SPT-SZ selected Galaxy Clusters
• Contemporaneous broadband observations of three high-redshift BL Lac Objects
• VHE $\gamma$-ray discovery and multi-wavelength study of the blazar 1ES 2322-409
• Testing spatial uniformity of the CR spectrum in the local ISM with gamma-ray observations
• Active galactic nuclei with GeV activities and the PeV neutrino source candidate TXS 0506+056
• The Dawn of Multi-Messenger Astronomy
• XMM-Newton and Chandra observations of the unidentified Fermi-LAT source 3FGL J1016.5-6034: A Young Pulsar with a Nebula?
• Beyond the 2nd Fermi Pulsar Catalog
• Investigating Possible Correlations between Gamma-Ray and Optical Lightcurves for TeV-Detected Northern Blazars over 8 Years of Observations
• Testing No-Scale Supergravity with the Fermi Space Telescope LAT
• Pulsar Emission above the Spectral Break - A Stacked Approach
• Multi-wavelength constraints on cosmic-ray leptons in the Galaxy
• Einstein@Home Searches for Gamma-ray Pulsars in the Inner Galaxy
• Obscured $pp$-channel neutrino sources
• Analysis Methods for Gamma-ray Astronomy
• Dark Matter Searches with the Fermi-LAT in the Direction of Dwarf Spheroidals
• Galaxy-cluster-stacked Fermi-LAT II: extended central hadronic signal
• Constraining Gamma-ray Lines from Dark Matter Annihilation using Fermi-LAT and H.E.S.S. data
• A Panchromatic View of Relativistic Jets in Narrow-Line Seyfert 1 Galaxies
• Calorimeter-only analysis of the Fermi Large Area Telescope
• Identifying multiwavelength counterparts to astrophysical neutrino events
• Multi-wavelength Signatures of Cosmic Rays in the Milky Way
• A New Gamma-ray Emitting Population of FR0 Radio Galaxies
• Constraints on dark matter scattering with long lived mediators from observations of the Sun with the Fermi Large Area Telescope
• SALT Spectropolarimetry and Self-Consistent SED and Polarization Modeling of Blazars
• Measurement of High Energy Gamma Rays from 200 MeV to 1 TeV with the Alpha Magnetic Spectrometer on the International Space Station
• Space Detectors for Gamma Rays (100 MeV - 100 GeV): from EGRET to Fermi LAT
• Boosting (In)direct Detection of Dark Matter
• Deepening gamma-ray point-source catalogues with sub-threshold information