2008A&A...482..247P


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.23CEST10:57:32

2008A&A...482..247P - Astronomy and Astrophysics, volume 482, 247-253 (2008/4-4)

Radio detections towards unidentified variable EGRET sources.

PAREDES J.M., MARTI J., ISHWARA-CHANDRA C.H., TORRES D.F., ROMERO G.E., COMBI J.A., BOSCH-RAMON V., MUNOZ-ARJONILLA A.J. and SANCHEZ-SUTIL J.R.

Abstract (from CDS):

A considerable fraction of the γ-ray sources discovered with the Energetic Gamma-Ray Experiment Telescope (EGRET) remain unidentified. The EGRET sources that have been properly identified are either pulsars or variable sources at both radio and gamma-ray wavelengths. Most of the variable sources are strong radio blazars. However, some low galactic-latitude EGRET sources, with highly variable γ-ray emission, lack any evident counterpart according to the radio data available until now. The primary goal of this paper is to identify and characterise the potential radio counterparts of four highly variable γ-ray sources in the galactic plane through mapping the radio surroundings of the EGRET confidence contours and determining the variable radio sources in the field whenever possible. We have carried out a radio exploration of the fields of the selected EGRET sources using the Giant Metrewave Radio Telescope (GMRT) interferometer at 21cm wavelength, with pointings being separated by months. We detected a total of 151 radio sources. Among them, we identified a few radio sources whose flux density has apparently changed on timescales of months. Despite the limitations of our search, their possible variability makes these objects a top-priority target for multiwavelength studies of the potential counterparts of highly variable, unidentified gamma-ray sources.

Abstract Copyright:

Journal keyword(s): radio continuum: stars - gamma rays: observations - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/482/247): table4.dat>

Nomenclature: Table 4: [PMI2008] JHHMMSS.s+DDMMSS N=151.

Status in Simbad:  will not be processed

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2431 2
2 LS I +61 303 HXB 02 40 31.6641883136 +61 13 45.591138110 11.27 11.61 10.75 10.19 9.55 B0Ve 749 2
3 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3615 1
4 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78   ~ 954 1
5 3EG J1735-1500 gam 17 36 -15.0           ~ 18 0
6 PMN J1738-1502 Rad 17 38 11.6383754401 -15 03 00.040619835           ~ 11 1
7 GRO J1747-09 gam 17 44.0 -10 11           ~ 17 0
8 PMN J1747-0959 Rad 17 47 27.70 -09 59 16.6           ~ 2 1
9 PMN J1808-1041 Rad 18 08 56 -10 41.7           ~ 2 0
10 3EG J1810-1032 gam 18 10 -10.5           ~ 9 0
11 PMN J1810-1054 Rad 18 10 08 -10 54.9           ~ 2 0
12 PMN J1810-1102 Rad 18 10 15 -11 02.5           ~ 2 0
13 PSR J1813-1246 Psr 18 13 23.768 -12 46 00.63           ~ 70 0
14 PMN J1822-0939 Rad 18 22 28.70 -09 38 57.0           ~ 28 1
15 V* V479 Sct HXB 18 26 15.0561532140 -14 50 54.249464136 12.02 12.23 11.27 11.04   ON6V((f))z 483 2
16 2EG J1905-1120 gam 19 05 -11.4           ~ 13 0
17 PMN J1905-1153 Rad 19 05 28.58783 -11 53 32.4159           ~ 9 1
18 PMN J1906-1114 Rad 19 06 44.4 -11 14 35           ~ 2 0
19 QSO B1908-202 QSO 19 11 09.65289198 -20 06 55.1089891   18.21   18.14   ~ 229 0
20 PSR J1928+1746 Psr 19 28 42.8 +17 46 27           ~ 37 0
21 3EG J2035+4441 gam 20 35 +44.7           ~ 9 0

    Equat.    Gal    SGal    Ecl

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2019.10.23-10:57:32

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