Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
Mitthumsiri W; Pei Z; Fiori A; Mirabal N; Caraveo PA; Sgro C; Maldera S; Grenier IA; Monzani ME; Torres DF; Chiaro G; Kerr M; Wood K; Latronico L; Orienti M; Germani S; Hewitt JW; Franckowiak A; Baldini L; Fukazawa Y; Digel SW; Serini D; Parkinson PMS; Bissaldi E; Cutini S; Rando R; Mizuno T; Mereu I; Razzano M; Di Lalla N; Orlando E; Pesce-Rollins M; Guiriec S; Green D; Troja E; Crnogorcevic M; Bruel P; Imazawa R; Berretta A; Moskalenko IV; Palatiello M; Gasparrini D; Lubrano P; Reimer A; Buson S; Ojha R; Funk S; Spandre G; Chen S; Yassine M; Matake H; Fleischhack H; Poon H; Gonzalez JB; Orestano PC; Raino S; Bottacini E; Manfreda A; Paneque D; Fusco P; Siskind EJ; Tajima H; Loparco F; Persic M; Liodakis I; Petrosian V; Larsson S; Mazziotta MN; Porter TA; Bellazzini R; Gargano F; Gustafsson M; Kuss M; Meyer M; de Palma F; Bastieri D; Reimer O; Longo F; Dirirsa F; Cibario N; Li J; Bonino R; Griffin S; Paliya V; Suson DJ; Negro M; Blandford RD; Bloom ED; Giordano F; Nagasawa S; Rani B; Johannesson G; Ciprini S; Horan D; Principe G; Marti-Devesa G; Cavazzuti E; Lovellette MN; Luque PD; Morselli A; Razzaque S; Kocevski D; Tosti G; Ballet J; Giroletti M; Zaharijas G; D'Ammando F; Dominguez A; Cameron RA; Spinelli P; Scotton L; Di Venere L; Racusin JL; Ciangottini D; Tak D; Giglietto N
Catalog of Long-term Transient Sources in the First 10 yr of Fermi-LAT Data
Mitthumsiri W
Pei Z
Fiori A
Mirabal N
Caraveo PA
Sgro C
Maldera S
Grenier IA
Monzani ME
Torres DF
Chiaro G
Kerr M
Wood K
Latronico L
Orienti M
Germani S
Hewitt JW
Franckowiak A
Baldini L
Fukazawa Y
Digel SW
Serini D
Parkinson PMS
Bissaldi E
Cutini S
Rando R
Mizuno T
Mereu I
Razzano M
Di Lalla N
Orlando E
Pesce-Rollins M
Guiriec S
Green D
Troja E
Crnogorcevic M
Bruel P
Imazawa R
Berretta A
Moskalenko IV
Palatiello M
Gasparrini D
Lubrano P
Reimer A
Buson S
Ojha R
Funk S
Spandre G
Chen S
Yassine M
Matake H
Fleischhack H
Poon H
Gonzalez JB
Orestano PC
Raino S
Bottacini E
Manfreda A
Paneque D
Fusco P
Siskind EJ
Tajima H
Loparco F
Persic M
Liodakis I
Petrosian V
Larsson S
Mazziotta MN
Porter TA
Bellazzini R
Gargano F
Gustafsson M
Kuss M
Meyer M
de Palma F
Bastieri D
Reimer O
Longo F
Dirirsa F
Cibario N
Li J
Bonino R
Griffin S
Paliya V
Suson DJ
Negro M
Blandford RD
Bloom ED
Giordano F
Nagasawa S
Rani B
Johannesson G
Ciprini S
Horan D
Principe G
Marti-Devesa G
Cavazzuti E
Lovellette MN
Luque PD
Morselli A
Razzaque S
Kocevski D
Tosti G
Ballet J
Giroletti M
Zaharijas G
D'Ammando F
Dominguez A
Cameron RA
Spinelli P
Scotton L
Di Venere L
Racusin JL
Ciangottini D
Tak D
Giglietto N
IOP PUBLISHING LTD
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021093048660
https://urn.fi/URN:NBN:fi-fe2021093048660
Tiivistelmä
We present the first Fermi Large Area Telescope (LAT) catalog of long-term gamma-ray transient sources (1FLT). This comprises sources that were detected on monthly time intervals during the first decade of Fermi-LAT operations. The monthly timescale allows us to identify transient and variable sources that were not yet reported in other Fermi-LAT catalogs. The monthly data sets were analyzed using a wavelet-based source detection algorithm that provided the candidate new transient sources. The search was limited to the extragalactic regions of the sky to avoid the dominance of the Galactic diffuse emission at low Galactic latitudes. The transient candidates were then analyzed using the standard Fermi-LAT maximum likelihood analysis method. All sources detected with a statistical significance above 4 sigma in at least one monthly bin were listed in the final catalog. The 1FLT catalog contains 142 transient gamma-ray sources that are not included in the 4FGL-DR2 catalog. Many of these sources (102) have been confidently associated with active galactic nuclei (AGNs): 24 are associated with flat-spectrum radio quasars, 1 with a BL Lac object, 70 with blazars of uncertain type, 3 with radio galaxies, 1 with a compact steep-spectrum radio source, 1 with a steep-spectrum radio quasar, and 2 with AGNs of other types. The remaining 40 sources have no candidate counterparts at other wavelengths. The median gamma-ray spectral index of the 1FLT-AGN sources is softer than that reported in the latest Fermi-LAT AGN general catalog. This result is consistent with the hypothesis that detection of the softest gamma-ray emitters is less efficient when the data are integrated over year-long intervals.
Kokoelmat
- Rinnakkaistallenteet [19207]