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J/A+A/507/241   IR and 610MHz observations in MGRO J2019+37  (Paredes+, 2009)

Radio continuum and near-infrared study of the MGRO J2019+37 region. Paredes J.M., Marti J., Ishwara-Chandra C.H., Sanchez-Sutil J.R., Munoz-Arjonilla A.J., Moldon J., Peracaula M., Luque-Escamilla P.L., Zabalza V., Bosch-Ramon V., Bordas P., Romero G.E., Ribo M. <Astron. Astrophys. 507, 241 (2009)> =2009A&A...507..241P
ADC_Keywords: Gamma rays ; Radio sources ; X-ray sources ; H II regions Keywords: gamma rays: observations - HII regions - infrared: stars - radio continuum: stars - X-rays: binaries Abstract: MGROJ2019+37 is an unidentified extended source of very high energy gamma-rays originally reported by the Milagro Collaboration as the brightest TeV source in the Cygnus region. Its extended emission could be powered by either a single or several sources. The GeV pulsar AGL J2020.5+3653 discovered by AGILE and associated with PSR J2021+3651 could contribute to the emission from MGRO J2019+37. The aim of this paper is to identify radio and near-infrared sources in the field of the extended TeV source MGRO J2019+37, and study potential counterparts to explain its emission. We surveyed a region of about 6 square degrees with the Giant Metrewave Radio Telescope (GMRT) at the frequency 610MHz. We also observed the central square degree of this survey in the near-infrared Ks-band using the 3.5m telescope in Calar Alto. Archival X-ray observations of some specific fields are included. VLBI observations of an interesting radio source were performed. We explored possible scenarios to produce the multi-TeV emission from MGRO J2019+37 and studied which of the sources could be the main particle accelerator. Description: This table contains information about all radio sources detected with the Giant Metrewave Radio Telescope (GMRT) of the National Centre for Radio Astrophysics (NCRA) in Khodad (India) in the MGRO J2019+37 region. The observations were carried out at 610MHz (49cm wavelength) in July 2007. An hexagonal pattern of 19 pointings was designed in order to cover the region of 2.5 square degree centered on the MGRO J2019+37 peak of emission. The list of sources was determined using the SExtractor automatic procedure over our 5" resolution radio mosaic. Only sources with peak ux density higher than about ten times the local noise after primary beam correction were included. There are 42 of the 362 detected radio sources inside the area imaged in the near-infrared Ks-band. A total of 6 out of these 42 sources have a near-infrared counterpart candidate within 0.6" of their radio position. On the other hand, a total of 41 of the 362 radio sources are located in fields observed in X-rays. In this case, 5 of the 41 radio sources have an X-ray counterpart candidate within 5" (the typical uncertainty for XMM-Newton). Both, the Ks magnitude and the X-ray flux, are listed when available. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 98 362 List of GMRT sources detected
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq GMRT source number 5- 8 A4 --- --- [GMRT] 9- 24 A16 --- GMRT GMRT source name (JHHMMSS.s+DDMMSS) 26- 27 I2 h RAh Right ascension (J2000) 29- 30 I2 min RAm Right ascension (J2000) 32- 36 F5.2 s RAs Right ascension (J2000) 38 A1 --- DE- Declination sign (J2000) 39- 40 I2 deg DEd Declination (J2000) 42- 43 I2 arcmin DEm Declination (J2000) 45- 48 F4.1 arcsec DEs Declination (J2000) 50- 56 F7.2 mJy Speak Peak flux density at 610MHz (in mJy/beam) 58- 61 F4.2 mJy Noise Local noise (in mJy/beam) 63- 69 F7.2 mJy Sint Integrated flux density at 610MHz 71- 74 F4.2 mJy e_Sint Error in integrated flux density 76- 78 A3 --- IR Near-infrared detection (1) 80- 83 F4.1 mag Ksmag ? Magnitude (apparent) in Ks filter 85- 87 A3 --- XR X-ray detection (2) 89- 93 F5.2 10-16W/m2 XFlux ? X-ray (0.2-12keV) flux (10-13erg/cm2/s) 95- 98 F4.2 10-16W/m2 e_XFlux ? Error in X-ray flux
Note (1): Near-infrared detection meaning: --- = Not covered ND = Covered, but not detected D = Counterpart candidate detected, magnitude in Kmag column Note (2): X-ray detection meaning: --- = Not covered ND = Covered, but not detected D = Counterpart candidate detected, X-ray flux in XFlux column
Acknowledgements: Juan Ramon Sanchez Sutil, jrssutil(at) References: Abdo et al., 2007ApJ...658L..33A, Discovery of TeV Gamma-Ray Emission from the Cygnus Region
(End) Patricia Vannier [CDS] 10-Sep-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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