2006A&A...458..245L


Query : 2006A&A...458..245L

2006A&A...458..245L - Astronomy and Astrophysics, volume 458, 245-257 (2006/10-4)

XMM-Newton and ESO observations of the two unidentified γ-ray sources 3EG J0616-3310 and 3EG J1249-8330.

LA PALOMBARA N., MIGNANI R.P., HATZIMINAOGLOU E., SCHIRMER M., BIGNAMI G.F. and CARAVEO P.

Abstract (from CDS):

The limited angular resolution of γ-ray telescopes prevents a direct identification of the majority of sources detected so far. This is particularly true for the low latitude, probably galactic, ones only 10% of which has been identified. Most counterparts of the identified low-latitude γ-ray sources are Isolated Neutron Stars (INS), both radio-loud and radio-quiet (Geminga-like) objects, which are characterised by an extremely high value of the X-ray-to-optical flux ratio fX/fopt. Therefore, the systematic X-ray and optical coverage of low-latitude unidentified γ-ray sources aiming at high fX/fopt sources seems one of the most promising ways to spot INS candidate counterparts. Since low latitude sources are heavily affected by the interstellar absorption at both X-ray and optical wavelengths, we have focussed on two middle-latitude, probably galactic, GRO/EGRET sources: 3EG J0616-3310 and 3EG J1249-8330. These two sources, which could belong to a local galactic population, have been selected owing to their relatively good positional accuracy, spectral shape and lack of candidate extragalactic radio counterparts. Here we report on X-ray observations of the two γ-ray error boxes performed with XMM-Newton and on their optical follow-up carried on with the Wide Field Imager at the ESO/MPG 2.2m telescope. Less than half of the ∼300 sources detected by the X-ray coverage have no optical counterparts. Among those, we have selected few interesting sources with fX/fopt≥100, which we consider promising INS candidates.

Abstract Copyright:

Journal keyword(s): stars: neutron - gamma-rays: observations - X-rays: general

VizieR on-line data: <Available at CDS (J/A+A/458/245): table1.dat table7.dat appendix.ps chart.pdf>

CDS comments: Paragraph 5. Format NVSS NNNN not in Simbad.

Simbad objects: 49

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Number of rows : 49
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PSR J0007+7303 Psr 00 06 34.20 +73 11 06.6           ~ 162 1
2 SNR G119.5+10.2 SNR 00 06.6 +72 47           ~ 244 1
3 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 321 2
4 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 853 1
5 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 812 2
6 3EG J0416+3650 rG 04 16 +36.8           ~ 15 1
7 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16414 1
8 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 937 0
9 GRO J0542+26 gam 05 42 +26.0           ~ 19 1
10 PSR J0614-3329 Psr 06 14 10.3479 -33 29 54.116           ~ 82 1
11 XMMU J061429.8-333225 X 06 14 29.8 -33 32 25           ~ 2 0
12 XMMU J061450.2-331501 X 06 14 50.2 -33 15 01           ~ 2 0
13 XMMU J061504.5-330533 X 06 15 04.5 -33 05 33           ~ 1 0
14 XMMU J061507.9-330026 X 06 15 07.9 -33 00 26           ~ 1 0
15 XMMU J061526.1-331724 X 06 15 26.1 -33 17 24           ~ 1 0
16 XMMU J061546.9-333347 X 06 15 46.9 -33 33 47           ~ 1 0
17 XMMU J061557.2-324635 X 06 15 57.2 -32 46 35           ~ 1 0
18 NVSS J061758-325849 Rad 06 17 58.86 -32 58 53.0           ~ 2 1
19 XMMU J061807.6-331237 X 06 18 07.6 -33 12 37           ~ 2 0
20 3EG J0634+0521 gam 06 32 51.3 +05 50 43           ~ 25 0
21 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1166 0
22 PSR J0635+0533 Psr 06 35 17.4 +05 33 21   13.81 12.83     B1IIIe-B2Ve 44 0
23 NAME MONOCEROS NEB SNR 06 38 43 +06 30.2           ~ 236 0
24 PSR J1016-58 Psr 10 16 21.266 -58 57 11.70           ~ 105 3
25 PSR B1046-58 Psr 10 48 13.0500 -58 32 06.200           ~ 253 0
26 QSO B1221-829 Bla 12 24 54.38260236 -83 13 10.1020138   22.5   19.7   ~ 72 2
27 XMMU J124642.5-832212 X 12 46 42.5 -83 22 12           ~ 2 0
28 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4303 3
29 PSR J1418-6058 Psr 14 18 42.725 -60 58 01.89           ~ 111 0
30 PSR J1420-6048 Psr 14 20 08.190 -60 48 14.85           ~ 180 0
31 NGC 6251 Sy2 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 700 0
32 NAME AX J163904-4642 HXB 16 39 06 -46 42.2           BIV-V 89 1
33 3EG J1639-4702 gam 16 40 30.0 -46 33 00           ~ 144 2
34 3EG J1735-1500 gam 17 36 -15.0           ~ 18 0
35 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13331 0
36 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 542 2
37 PSR J1836+5925 Psr 18 36 13.661 +59 25 29.77           ~ 133 1
38 PSR B1835-06.1 Psr 18 37 43.55 -06 04 49.0           ~ 60 0
39 [VV2006] J200556.6-231027 QSO 20 05 56.59553204 -23 10 27.0097030     19.30     ~ 64 1
40 QSO J2015+371 BLL 20 15 28.72978661 +37 10 59.5147372     21.82 21.4   ~ 271 2
41 PSR J2021+3651 Psr 20 21 05.40 +36 51 04.5           ~ 171 1
42 GRO J2021+37 gam 20 21 19.9 +37 15 12           ~ 92 2
43 GRO J2019+40 gam 20 21.5 +40 26           ~ 127 1
44 PSR J2021+4026 Psr 20 21 30.496 +40 26 53.56           ~ 227 2
45 * gam Cyg V* 20 22 13.7018357 +40 15 24.044963 3.44 2.90 2.23 1.74 1.40 F8Ib 569 0
46 3EG J2027+3429 gam 20 26 36.7 +34 49 45           ~ 18 0
47 PSR J2028+3332 Psr 20 28 19.876 +33 32 04.23           ~ 58 0
48 PSR J2229+6114 Psr 22 29 05.262 +61 14 08.48           ~ 204 2
49 NAME Gould Belt PoG ~ ~           ~ 827 1

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2022.12.07-12:03:57

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