The Parkes-MIT-NRAO (PMN) surveys. 3: Source catalog for the tropical survey (-29 deg less than delta less than -9 deg .5)

Griffith, Mark R.; Wright, A. E.; Burke, B. F.; Ekers, R. D.

doi:10.1086/191863

Cited by 208 publications

(156 citation statements)

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“…Such an additional component is in any case needed to explain the emission at radio frequencies, which was measured with the Nancay radio telescope at 2.685 GHz (see Aharonian et al 2005a, for a description of the instrument and data processing). The flux levels obtained in June 2004 (0.11 ± 0.02 Jy, not simultaneous to the other data presented in this paper) and in March 2005 (0.08 ± 0.01 Jy, simultaneous to the data presented in this paper) were comparable to previous measurements (Griffith et al 1994;Douglas et al 1996).…”

Section: One-zone Leptonic Emission Modelsupporting

confidence: 89%

Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation

Aharonian

Akhperjanian

Bazer‐Bachi

et al. 2007

A&A

119

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Context. The blazar 1ES 1101-232 was observed with the High Energy Stereoscopic System (HESS) of Atmospheric Cherenkov Telescopes (ACT) in 2004 and 2005, for a live time of 43 h. VHE (E > 10 11 eV) γ-rays were detected for the first time from this object. Aims. VHE observations of blazars are used to investigate the inner parts of the blazar jets, and also to study the extragalactic background light (EBL) in the near-infrared band. Methods. Observations in 2005 were conducted in a multiwavelength campaign, together with the RXTE satellite and optical observations. In 2004, simultaneous observations with XMM-Newton were obtained. Results. 1ES 1101-232 was detected with HESS with an excess of 649 photons, at a significance of 10σ. The measured VHE γ-ray flux amounts to dN/dE = (5.63 ± 0.89) × 10 −13 (E/TeV) −(2.94±0.20) cm −2 s −1 TeV −1 , above a spectral energy threshold of 225 GeV. No significant variation of the VHE γ-ray flux on any time scale was found. 1ES 1101-232 exhibits a very hard spectrum, and at a redshift of z = 0.186, is the blazar with the highest confirmed redshift detected in VHE γ-rays so far. Conclusions. The data allow the construction of truly simultaneous spectral energy distributions of the source, from the optical to the VHE band. Using an EBL model with νF ν = 14 nWm −2 sr −1 at 1.5 µm as presented in Aharonian et al. (2006a) suggests an intrinsic VHE power output peak of the source at above 3 TeV.

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Section: One-zone Leptonic Emission Modelsupporting

confidence: 89%

Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation

Aharonian

Akhperjanian

Bazer‐Bachi

et al. 2007

A&A

119

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“…The catalogued values for A 23 and A 51 were calculated from the 14.7 GHz flux reported in Milne & Aller (1982) and for M 3-2 from the Hβ flux from Kaler et al (1990). We also found a 5 GHz flux density (65±11 mJy) for NGC 2452 detected in the PMN Tropical survey (Griffith et al 1994), which is in excellent agreement with the Milne & Aller (1975) value. From Milne & Aller (1982 we found flux measurements at 14.7 GHz for A 23 (6±5 mJy), A 51 (26±5 mJy) and NGC 2452 (54±5 mJy).…”

Section: Radio-continuum Spectral Energy Distributionsupporting

confidence: 86%

“…Filled circles represent the integrated flux densities measured from the new ATCA radio images (this paper). Other values are from: MW79 (Milne & Webster 1979); MA82 (Milne & Aller 1982); PMN (Griffith et al 1994); NVSS (Condon et al 1998). The straight line represent the best fit of the power-law function (S(ν) ∝ ν α ) to all data-points from the obtained empirical distribution.…”

Section: Detection Qualitymentioning

confidence: 99%

A pilot study of the radio‐continuum emission from MASH planetary nebulae

et al. 2011

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Key words astronomical data bases: miscellaneous -planetary nebulae: general -radiation mechanisms: thermal -radio continuum: ISM We report an Australia Telescope Compact Array (ATCA) radio-continuum observations of 26 planetary nebulae (PNe) at wavelengths of 3 and 6 cm. This sample of 26 PNe were taken from the Macquarie/AAO/Strasbourg Hα PNe (MASH) catalogue and previous lists. We investigate radio detection quality including measured and derived parameters for all detected or marginally detected PNe from this combined sample. Some 11 objects from the observed sample have been successfully detected and parametrized. Except for one, all detected PNe have very low radio surface brightnesses. We use a statistical distance scale method to calculate distances and ionised masses of the detected objects. Nebulae from this sample are found to be large (>0.2 pc in diameter) and highly diluted which indicates old age. For 21 PNe from this sample we list integrated Hα fluxes and interstellar extinction coefficients, either taken from the literature or derived here from the Balmer decrement and radio to Hα ratio methods. Finally, our detected fraction of the MASH pilot sample is relatively low compared to the non-MASH sub-sample. We conclude that future radio surveys of the MASH sample must involve deeper observations with better uv coverage in order to increase the fraction of detected objects and improve the quality of the derived parameters.

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“…Gregory et al (1996); 3) Griffith et al (1995); 4) Griffith et al (1994); 5) Haynes et al (1979); 6) Milne (1979); 7) Milne (1975); 8) Wright et al (1994).…”

Section: Observations and Resultsunclassified

Millimeter observations of planetary nebulae

Umana¹,

Leto

Trigilio³

et al. 2008

A&A

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Aims. We present 43 GHz (7 mm) observations of a sample of radio-bright Planetary nebulae aimed to obtain, together with far-IR measurements (IRAS), reliable estimates of the fluxes emitted in the millimetre and sub-millimetre band, and, therefore, to test their detectability by the forthcoming ESA PLANCK mission. This spectral range, even though very important to constrain the physics of circumstellar environments, is still far from being completely exploited. Methods. The new millimetre 43 GHz observations were obtained by using the 32 m INAF-IRA Noto Radiotelescope. To estimate the millimetre and sub-millimetre fluxes, we extrapolated and summed the ionized gas (free-free radio emission) and dust (thermal emission) contributions in this frequency range. By comparison of the derived flux densities to the predicted sensitivity we investigate the possible detection of such source for all the channels of PLANCK Results. We conclude that almost 80% of our sample will be detected by PLANCK, with a higher detection rate in the higher frequency channels, where there is a good combination of brighter intrinsic flux from the sources and reduced extended Galactic foregrounds contamination despite poorer instrumental sensitivity. From the new 43 GHz, combined with single-dish 5 GHz observations from the literature, we derive radio spectral indexes, which are consistent with optically thin free-free nebula. This result indicates that the high frequency radio spectrum of our sample sources is dominated by thermal free-free, and other emissions, if present, are negligible.

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The Parkes-MIT-NRAO (PMN) surveys. 3: Source catalog for the tropical survey (-29 deg less than delta less than -9 deg .5)

Cited by 208 publications

References 0 publications

Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation

Detection of VHE gamma-ray emission from the distant blazar 1ES 1101-232 with HESS and broadband characterisation

A pilot study of the radio‐continuum emission from MASH planetary nebulae

Millimeter observations of planetary nebulae

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