2000ApJ...542..740M

Query : 2000ApJ...542..740M

2000ApJ...542..740M - Astrophys. J., 542, 740-749 (2000/October-3)

Multiwavelength examination of the COS B field 2CG 075+00 yields a blazar identification for 3EG J2016+3657.

MUKHERJEE R., GOTTHELF E.V., HALPERN J. and TAVANI M.

Abstract (from CDS):

We present a high-energy study of the intriguing COS B γ-ray field, 2CG 075+00, in order to search for possible counterparts. New EGRET data show that the COS B emission probably corresponds to two localized γ-ray sources, 3EG J2016+3657 and 3EG J2021+3716. Spectral fits to these EGRET sources, assuming a power-law model, yield photon indices of ∼2 for each object. We examine archival ROSAT and ASCA X-ray data that overlap both EGRET error boxes and find several point sources in the region to a flux limit of approximately 6.5x10–13 ergs.cm–2.s–1. We conclude that the most probable candidate for 3EG J2016+3657 is the compact, variable, flat-spectrum radio and millimeter source B2013+370 (G74.87+1.22), which has blazarlike properties. The other source, 3EG J2021+3716, remains unidentified.

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Journal keyword(s): Galaxies: BL Lacertae Objects: General - Gamma Rays: Observations - X-Rays: General

Nomenclature: Table 1: [MGH2000] NN (Nos 1-14). Table 2: [MGH2000] JHHMMSS.ss+DDMMSS.s N=7.

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
2 PSR J0633+1746 Psr 06 33 54.153 +17 46 12.91           ~ 1308 0
3 PSR B1046-58 Psr 10 48 13.10000 -58 32 03.0000           ~ 293 0
4 2CG 288-00 gam 10 50 -60.1           ~ 19 0
5 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
6 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
7 2CG 342-02 gam 17 08 30.1 -44 35 03           ~ 33 0
8 PSR B1706-44 Psr 17 09 42.62000 -44 29 12.0000     13.30     ~ 670 1
9 RX J2015.2+3659 CV* 20 15 14.87 +36 59 22.2           ~ 6 0
10 QSO J2015+371 BLL 20 15 28.72978661 +37 10 59.5147372     21.82 21.4   ~ 324 2
11 HD 228600 * 20 15 30.7773575952 +37 20 03.136942536   10.44 10.04     ~ 6 0
12 RX J2015.5+3704 CV* 20 15 35.71 +37 04 59.0           ~ 5 0
13 RX J2015.6+3711 CV* 20 15 36.9637800072 +37 11 23.015915196     17.8     ~ 22 0
14 [MGH2000] J201553.68+371130.2 Rad 20 15 53.68 +37 11 30.2           ~ 1 1
15 SNR G074.9+01.2 SNR 20 16 02.4 +37 12 48           ~ 195 2
16 [MGH2000] J201605.82+371405.5 Rad 20 16 05.82 +37 14 05.5           ~ 1 1
17 RX J2016.6+3705 SB* 20 16 37.5883070352 +37 05 55.501625652   11.733 11.090 10.927   ~ 4 0
18 HD 193077 WR* 20 17 00.0260987184 +37 25 23.785483116 7.82 8.32 8.01 8.71   WN5o+B? 297 0
19 HD 228766 WR* 20 17 29.7041883216 +37 18 31.128288048 9.42 9.79 9.14     O4If+O8:II: 119 0
20 Kiso J201735.80+363801.5 EB* 20 17 35.8076761200 +36 38 01.726070712         10.576 ~ 3 0
21 [MGH2000] 9 * 20 17 36.05 +36 37 56.1           K 3 0
22 SH 2-104 HII 20 17 52.5 +36 49 24           ~ 97 0
23 [MGH2000] 14 * 20 19 43.7 +37 35 49           ~ 2 0
24 HD 228933 * 20 19 44.1969300240 +37 35 27.208272948   11.33 10.32     ~ 4 0
25 [MGH2000] 11 X 20 20 42.4 +38 02 05           ~ 2 0
26 TYC 3152-260-1 ** 20 21 21.336072 +37 58 23.48508   11.927 11.472 11.354   ~ 2 0
27 UCAC4 640-091828 * 20 21 22.3659322817 +37 58 05.520671262       12.486   ~ 1 0
28 [MGH2000] J202138.67+373110.1 HII 20 21 38.67 +37 31 10.1           ~ 2 0
29 [MGH2000] J202141.60+372552.1 HII 20 21 41.60 +37 25 52.1           ~ 2 0
30 GRO J2021+37 gam 20 22 37.2 +37 16 53           ~ 94 2
31 HD 229153 * 20 22 45.3308255040 +37 57 41.410509804 10.39 10.09 9.14     O9.7III 21 0
32 [MGH2000] 10 X 20 23 22.2 +37 59 42           ~ 2 0

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