2014ApJ...788...78A

Query : 2014ApJ...788...78A

2014ApJ...788...78A - Astrophys. J., 788, 78 (2014/June-2)

Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS.

ALIU E., AUNE T., BEHERA B., BEILICKE M., BENBOW W., BERGER K., BIRD R., BOUVIER A., BUCKLEY J.H., BUGAEV V., CERRUTI M., CHEN X., CIUPIK L., CONNOLLY M.P., CUI W., DUMM J., DWARKADAS V.V., ERRANDO M., FALCONE A., FEDERICI S., FENG Q., FINLEY J.P., FLEISCHHACK H., FORTIN P., FORTSON L., FURNISS A., GALANTE N., GILLANDERS G.H., GOTTHELF E.V., GRIFFIN S., GRIFFITHS S.T., GRUBE J., GYUK G., HANNA D., HOLDER J., HUGHES G., HUMENSKY T.B., JOHNSON C.A., KAARET P., KARGALTSEV O., KERTZMAN M., KHASSEN Y., KIEDA D., KRENNRICH F., LANG M.J., MADHAVAN A.S., MAIER G., McARTHUR S., McCANN A., MILLIS J., MORIARTY P., MUKHERJEE R., NIETO D., O'FAOLAIN DE BHROITHE A., ONG R.A., OTTE A.N., PANDEL D., PARK N., POHL M., POPKOW A., PROKOPH H., QUINN J., RAGAN K., RAJOTTE J., REYES L.C., REYNOLDS P.T., RICHARDS G.T., ROACHE E., ROBERTS M., SEMBROSKI G.H., SHAHINYAN K., SMITH A.W., STASZAK D., TELEZHINSKY I., TUCCI J.V., TYLER J., VINCENT S., WAKELY S.P., WEINSTEIN A., WELSING R., WILHELM A., WILLIAMS D.A. and ZITZER B.

Abstract (from CDS):

We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (∼2°) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3±0.4. VER J2019+378 is a bright extended (∼1°) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75±0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possible emission mechanisms for this source.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: stars - pulsars: individual: PSR J2021+3651 - supernovae: individual: CTB 87

Simbad objects: 23

Full paper

View the references in ADS

Number of rows : 23

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Sp type	#ref 1850 - 2026	#notes
1	SNR G119.5+10.2	SNR	00 06.6	+72 47					~	268	1
2	NAME Vela X	Psr	08 33 08.880	-45 11 24.36					~	302	1
3	Cl Westerlund 1	OpC	16 47 02.4	-45 51 07					~	655	1
4	HESS J1708-443	gam	17 07 59.53847	-44 17 19.0460					~	17	0
5	SNR G343.1-02.3	SNR	17 08.0	-44 16					~	82	1
6	PSR B1706-44	Psr	17 09 42.62000	-44 29 12.0000			13.30		~	670	1
7	W 49a	SFR	19 10 15.7	+09 06 05					~	325	2
8	NAME Cyg Arm	PoG	20 02	+40.0					~	163	0
9	QSO J2015+371	BLL	20 15 28.72978661	+37 10 59.5147372			21.82	21.4	~	324	2
10	SNR G074.9+01.2	SNR	20 16 02.4	+37 12 48					~	195	2
11	CXOU J201609.2+371110	X	20 16 09.20	+37 11 10.5					~	13	0
12	Ass Cyg OB 1	As*	20 17.8	+37 38					~	270	1
13	SH 2-104	HII	20 17 52.5	+36 49 24					~	97	0
14	PSR J2017+3625	Psr	20 17 55.84	+36 25 07.9					~	32	0
15	1LHAASO J2018+3643u	gam	20 18.6	+36 43					~	67	0
16	IGR J20188+3647	gam	20 18 48	+36 47.5					~	10	0
17	2HWC J2019+367	gam	20 19.8	+36 48					~	24	0
18	4C 36.39	Rad	20 20 33.0	+36 31 58					~	13	1
19	PSR J2021+3651	Psr	20 21 05.40	+36 51 04.5					~	218	1
20	HD 193928	WR*	20 21 31.7290073688	+36 55 12.773070696	10.67	10.60	9.78		WN5-w+O5V-III	205	0
21	Cl Berkeley 87	OpC	20 21 35.0	+37 25 14					~	141	0
22	NAME Cyg X	Cld	20 30 04.7973633	+40 51 36.002197					~	962	1
23	NAME Cyg Complex	reg	20 32	+45.0					~	667	0

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