J/ApJS/237/32 Fermi cat. of High-lat. Extended Sources (FHES) (Ackermann+, 2018)
The search for spatial extension in high-latitude sources detected by the
Fermi Large Area Telescope.
Ackermann M., Ajello M., Baldini L., Ballet J., Barbiellini G.,
Bastieri D., Bellazzini R., Bissaldi E., Blandford R.D., Bloom E.D.,
Bonino R., Bottacini E., Brandt T.J., Bregeon J., Bruel P., Buehler R.,
Cameron R.A., Caputo R., Caraveo P.A., Castro D., Cavazzuti E., Charles E.,
Cheung C.C., Chiaro G., Ciprini S., Cohen-Tanugi J., Costantin D.,
Cutini S., D'Ammando F., De Palma F., Desai A., Di Lalla N., Di Mauro M.,
Di Venere L., Favuzzi C., Finke J., Franckowiak A., Fukazawa Y., Funk S.,
Fusco P., Gargano F., Gasparrini D., Giglietto N., Giordano F.,
Giroletti M., Green D., Grenier I.A., Guillemot L., Guiriec S., Hays E.,
Hewitt J.W., Horan D., Johannesson G., Kensei S., Kuss M., Larsson S.,
Latronico L., Lemoine-Goumard M., Li J., Longo F., Loparco F.,
Lovellette M.N., Lubrano P., Magill J.D., Maldera S., Manfreda A.,
Mazziotta M.N., McEnery J.E., Meyer M., Mizuno T., Monzani M.E.,
Morselli A., Moskalenko I.V., Negro M., Nuss E., Omodei N., Orienti M.,
Orlando E., Ormes J.F., Palatiello M., Paliya V.S., Paneque D.,
Perkins J.S., Persic M., Pesce-rollins M., Piron F., Porter T.A.,
Principe G., Raino S., Rando R., Rani B., Razzaque S., Reimer A.,
Reimer O., Reposeur T., Sgro C., Siskind E.J., Spandre G., Spinelli P.,
Suson D.J., Tajima H., Thayer J.B., Tibaldo L., Torres D.F., Tosti G.,
Valverde J., Venters T.M., Vogel M., Wood K., Wood M., Zaharijas G.,
Biteau J., The Fermi-lat Collaboration
<Astrophys. J. Suppl. Ser., 237, 32-32 (2018)>
=2018ApJS..237...32A 2018ApJS..237...32A (SIMBAD/NED BibCode)
ADC_Keywords: Gamma rays; Active gal. nuclei; Cross identifications; Redshifts
Keywords: BL Lacertae objects: general; catalogs; gamma rays: general
ISM: H II Regions; ISM: supernova remnants
Abstract:
We present a search for spatial extension in high-latitude
(|b|>5°) sources in recent Fermi point source catalogs. The result
is the Fermi High-Latitude Extended Sources Catalog, which provides
source extensions (or upper limits thereof) and likelihood profiles
for a suite of tested source morphologies. We find 24 extended
sources, 19 of which were not previously characterized as extended.
These include sources that are potentially associated with supernova
remnants and star-forming regions. We also found extended γ-ray
emission in the vicinity of the Cen A radio lobes and-at GeV energies
for the first time-spatially coincident with the radio emission of the
SNR CTA 1, as well as from the Crab Nebula. We also searched for halos
around active galactic nuclei, which are predicted from
electromagnetic cascades induced by the e+e- pairs that are
deflected in intergalactic magnetic fields. These pairs are produced
when γ-rays interact with background radiation fields. We do not
find evidence for extension in individual sources or in stacked source
samples. This enables us to place limits on the flux of the extended
source components, which are then used to constrain the intergalactic
magnetic field to be stronger than 3x10-16G for a coherence length
λ≳10kpc, even when conservative assumptions on the source duty
cycle are made. This improves previous limits by several orders of
magnitude.
Description:
We report here on the Fermi High-Latitude Extended Sources Catalog
(FHES), a comprehensive search for spatially extended γ-ray
sources above 5° Galactic latitude using 7.5yrs of Pass 8 data
above 1GeV.
We analyze 90 months of LAT data (2008-August-4 to 2016-February-4)
and select the P8R2 SOURCE class of events. The Pass 8 data benefit
from an improved PSF, effective area, and energy reach. We have
selected events in the energy range from 1GeV to 1TeV.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 388 2545 Fermi catalog of high-latitude (|b|>5°)
extended sources (FHES) with best-fit parameters
and likelihood ratios
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Description of file:
gllhesv21.fits.gz is the original catalog file in FITS format
See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
IX/67 : Incremental Fermi LAT 4th (4FGL-DR3) (Fermi-LAT col., 2022)
J/MNRAS/353/1311 : Long-term timing observations of 374 pulsars (Hobbs+, 2004)
J/MNRAS/360/974 : Proper motionsof pulsars (Hobbs+, 2005)
J/MNRAS/362/1189 : Proper motions of 74 pulsars (Zou+, 2005)
J/A+A/545/A113 : MOJAVE IX. Core shift effects (Pushkarev+, 2012)
J/A+A/551/A97 : Lockman Hole/XMM VLBI observations (Middelberg+, 2013)
J/ApJS/208/17 : 2nd Fermi LAT cat. of gamma-ray pulsars (2PC) (Abdo+, 2013)
J/AJ/147/14 : The mJIVE-20 catalog (Deller+, 2014)
J/AJ/150/58 : VLBI ICRF2 (Fey+, 2015)
J/MNRAS/453/2599 : Fermi-LAT pulsar spectral data (Vigano+, 2015)
J/ApJS/217/2 : Refined associations of Fermi/LAT sources (Massaro+, 2015)
J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)
J/ApJS/224/8 : The first Fermi LAT SNR catalog (1SC) (Acero+, 2016)
J/ApJ/820/8 : 3FGL sources statistical classif. (Saz Parkinson+, 2016)
J/MNRAS/458/3341 : 42 ms pulsars high-precision timing (Desvignes+, 2016)
J/MNRAS/462/3180 : 3FGL Blazar of Unknown Type classification (Chiaro+, 2016)
J/ApJS/232/18 : The third Fermi-LAT >10GeV catalog (3FHL) (Ajello+, 2017)
J/A+A/602/A86 : Blazar cand. among Fermi/LAT 3FGL cat. (Lefaucheur+, 2017)
J/MNRAS/470/1291 : Classifying 3FGL with ANN (Salvetti+, 2017)
J/MNRAS/485/1822 : AGN core shift measurements (Plavin+, 2019)
J/MNRAS/490/4770 : Classifying Fermi-LAT gamma-ray sources (Kovacevic+, 2019)
J/ApJ/892/105 : 4th cat. of Fermi LAT-detected AGNs (4LAC) (Ajello+, 2020)
J/ApJ/916/28 : Cross-match between Swift-BAT & Fermi-LAT (Tsuji+, 2021)
J/ApJS/254/26 : Identifying 3FHL. V. CTIO-COSMOS spectra (Rajagopal+, 2021)
J/A+A/660/A87 : Machine learning methods with Fermi-LAT cat. (Bhat+, 2022)
http://fermi.gsfc.nasa.gov/ssc/data/analysis/documentation/Cicerone/
CiceroneData/LATDP.html : Fermi Support Center on NASA webpage
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source designation (3FGL JHHMM.m+DDMMc;
3FHL or FHES JHHMM.m+DDMM)
20- 23 A4 --- --- [3FGL]
25- 37 A13 --- 3FGL 3FGL source association (assoc_3fgl)
39- 42 A4 --- --- [3FHL]
44- 56 A13 --- 3FHL 3FHL source association (assoc_3fhl)
58- 75 A18 --- FL8Y Name of associated source in
preliminary LAT 8yr point source list
(assoc_fl8y)
77- 85 F9.6 deg SepLAT [0.0001/0.7]?=0 Angular separation
between FHES source and associated
source in FL8Y (sep_fl8y)
87- 112 A26 --- Assoc Source association from 3FGL (column
ASSOC1) or 3FHL (column ASSOC)
114- 120 A7 --- Class Source class from 3FGL (column CLASS1)
or 3FHL (column CLASS)
122- 127 F6.4 --- z [0.0018/3.11]? Redshift from 3FHL
or 3LAC (redshift)
129- 139 E11.5 Hz nupeak [2.9e+11/1.95e+18]? Synchrotron peak
frequency from 3FHL or 3LAC (nupeak)
141- 151 F11.7 deg RAdeg Right ascension of 3FGL or 3FHL source
(J2000) (RAJ2000)
153- 163 F11.7 deg DEdeg Declination of 3FGL or 3FHL source
(J2000) (DEJ2000)
165- 174 F10.6 deg GLON Galactic longitude of 3FGL or 3FHL
source
176- 185 F10.6 deg GLAT Galactic latitude of 3FGL or 3FHL source
187- 195 F9.7 deg e68Pos [0.0014/0.3] Symmetric statistical
error (68%) on position (pos_r68)
197- 205 F9.7 deg s68Pos [0/1.1] Symmetric systematic error (68%)
on position (posr68sys)
207- 215 F9.7 deg e95Pos [0.002/0.5] Symmetric statistical error
(95%) on position (pos_r95)
217- 223 F7.5 --- Index [0.08/7.2] Spectral slope at 1GeV
225- 231 F7.5 --- e_Index [0/2.2] Statistical error on index
(index_err)
233- 239 F7.5 --- s_Index [0/0.6] Systematic error (1σ)
on index (indexsyserr)
241- 256 A16 --- SpMod Spectral type (PowerLaw, LogParabola,
PLSuperExpCutoff) (SpectrumType)
258- 268 F11.4 --- ts [16/170674] Detection test statistic
270- 277 F8.4 --- tsExt [0/367] Extension test statistic TSext
(ts_ext)
279- 286 F8.4 --- tsExtsys [0/256] Minimum extension test statistic
(TSext) under bracketing models for
systematics (tsextsys)
288- 294 F7.4 --- tsHalo [-0.0041/77.7] Halo test statistic
TShalo (ts_halo)
296- 306 E11.6 cm-2.s-1 Flux [3e-11/1.1e-07] Integrated photon
flux (1GeV-1TeV)
308- 318 E11.6 cm-2.s-1 e_Flux [1.6e-11/1.2e-09] Statistical error
(1σ) on Flux (flux_err)
320- 330 E11.6 cm-2.s-1 s_Flux [0/2.9e-09] Systematic error (1σ)
on Flux (fluxsyserr)
332- 342 E11.6 MeV.cm-2.s-1 EFlux [2.6e-07/0.0004] Integrated energy
flux (1GeV-1TeV)
344- 354 E11.6 MeV.cm-2.s-1 e_EFlux [7.4e-08/1.4e-05] Statistical error
(1σ) on EFlux (eflux_err)
356- 360 A5 --- Model Best-fit spatial morphology
(RadialGaussian, RadialDisk,
PointSource) (ext_model)
362- 367 F6.4 deg Rext [0.003/2] Best-fit extension (ext_r68)
369- 374 F6.4 deg e_Rext [0.0028/0.4]? Statistical error
(1σ) on Rext (extr68err)
376- 381 F6.4 deg s_Rext [0/0.9] Systematic error (1σ) on
Rext (extr68sys_err)
383- 388 F6.4 deg B_Rext [0.017/2.3]? 95% CL upper limit on Rext
(extr68ul95)
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History:
Downloaded from http://www-glast.stanford.edu/pub_data/1261/
* 26-Oct-2023: Insert into VizieR
* 26-Apr-2024: Catalog updated for FL8Y+SepLAT columns
(to correct shift after line 549).
(End) Emmanuelle Perret [CDS] 12-Oct-2023