CanariCam: a multimode mid-infrared camera for the Gran Telescopio CANARIAS

Telesco, C. M.; Ciardi, David R.; French, James C.; Ftaclas, C.; Hanna, Kevin; Hon, David; Hough, J. H.; Julian, Jeff; Julian, Roger; Kidger, M.; Packham, C.; Piña, R. K.; Városi, F.; Sellar, R. Glenn

doi:10.1117/12.458979

Cited by 42 publications

(15 citation statements)

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“…Mrk 231 was observed on 2015 March 02 using the imaging polarimetric mode (Packham et al 2005) of CanariCam (Telesco et al 2003) on the 10.4-m GTC, Spain. Observations were taken within the ESO/GTC large program, and as required by this approved program, all the data were observed in queue mode under photometric conditions and image quality better than 0.6 arcsec measured at MIR wavelengths from the full width half maximum (FWHM) of the standard stars.…”

Section: Canaricam: Mid-infrared Imaging Polarimetrymentioning

confidence: 99%

Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core

López-Rodríguez

Packham

Jones

et al. 2016

Mon. Not. R. Astron. Soc.

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We present high-angular (0.17−0.35 arcsec) resolution imaging polarimetric observations of Mrk 231 in the 3.1 µm filter using MMT-Pol on the 6.5-m MMT, and in the 8.7 µm, 10.3 µm, and 11.6 µm filters using CanariCam on the 10.4-m Gran Telescopio CANARIAS. In combination with already published observations, we compile the 1−12 µm total and polarized nuclear spectral energy distribution (SED). The total flux SED in the central 400 pc is explained as the combination of 1) a hot (731 ± 4 K) dusty structure, directly irradiated by the central engine, which is at 1.6 ± 0.1 pc away and attributed to be in the pc-scale polar region, 2) an optically-thick, smooth and disk-like dusty structure ('torus') with an inclination of 48 ± 23• surrounding the central engine, and 3) an extinguished (A V = 36 ± 5 mag) starburst component. The polarized SED decreases from 0.77 ± 0.14 per cent at 1.2 µm to 0.31 ± 0.15 per cent at 11.6 µm and follows a power-law function, λ ∼0.57 . The polarization angle remains constant (∼108• ) in the 1−12 µm wavelength range. The dominant polarization mechanism is explained as scattering off hot dust grains in the pc-scale polar regions.

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Section: Canaricam: Mid-infrared Imaging Polarimetrymentioning

confidence: 99%

Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core

López-Rodríguez

Packham

Jones

et al. 2016

Mon. Not. R. Astron. Soc.

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“…close to the base of the jet, the corona, or the shock location (Blandford & Königl 1979;Markoff et al 2005;Marscher et al 2008;Polko et al 2014). To discern the thermal or non-thermal nature of the emission, we acquired also Ksand N-band imaging in polarised light using the Long-slit Intermediate Resolution Infrared Spectrograph (LIRIS) at the William Herschel Telescope (WHT, 4.2 m) and CanariCam (Telesco et al 2003) at the Gran Telescopio Canarias (GTC, 10.4 m), both facilities located at the Roque de los Muchachos Observatory (La Palma, Spain). This work is organised as follows.…”

Section: Introductionmentioning

confidence: 99%

A compact jet at the infrared heart of the prototypical low-luminosity AGN in NGC 1052

Fernández-Ontiveros

López-Gonzaga

Prieto

et al. 2019

Monthly Notices of the Royal Astronomical Society

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The feeble radiative efficiency characteristic of Low-Luminosity Active Galactic Nuclei (LLAGN) is ascribed to a sub-Eddington accretion rate, typically at log(L bol /L edd ) −3. At the finest angular resolutions that are attainable nowadays using mid-infrared (mid-IR) interferometry, the prototypical LLAGN in NGC 1052 remains unresolved down to < 5 mas (0.5 pc). This is in line with non-thermal emission from a compact jet, a scenario further supported by a number of evidences: the broken power-law shape of the continuum distribution in the radio-to-UV range; the ∼ 4% degree of polarisation measured in the nuclear mid-IR continuum, together with the mild optical extinction (A V ∼ 1 mag); and the "harder when brighter" behaviour of the X-ray spectrum, indicative of self-Compton synchrotron radiation. A remarkable feature is the steepness of the IR-to-UV core continuum, characterised by a power-law index of ∼ 2.6, as compared to the canonical value of 0.7. Alternatively, to explain the interferometric data by thermal emission would require an exceptionally compact dust distribution when compared to those observed in nearby AGN, with A V 2.8 mag to account for the IR polarisation. This is in contrast with several observational evidences against a high extinction along the line of sight, including the detection of the nucleus in the UV range and the well defined shape of the power-law continuum. The case of NGC 1052 shows that compact jets can dominate the nuclear emission in LLAGN across the whole electromagnetic spectrum, a scenario that might be common among this class of active nuclei.

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“…In this Letter we present 8-13 μm spectroscopy of the two nuclei of Arp 299 obtained with CanariCam (CC; Telesco et al 2003) on the 10.4 m Gran Telescopio Canarias (GTC). The GTC/CC high angular resolution 0.…”

Section: Introductionmentioning

confidence: 99%

UNCOVERING THE DEEPLY EMBEDDED ACTIVE GALACTIC NUCLEUS ACTIVITY IN THE NUCLEAR REGIONS OF THE INTERACTING GALAXY Arp 299

Alonso‐Herrero

Roche

Esquej

et al. 2013

ApJ

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We present mid-infrared (MIR) 8-13 μm spectroscopy of the nuclear regions of the interacting galaxy Arp 299 (IC 694+NGC 3690) obtained with CanariCam (CC) on the 10.4 m Gran Telescopio Canarias (GTC). The high angular resolution (∼0. 3-0. 6) of the data allows us to probe nuclear physical scales between 60 and 120 pc, which is a factor of 10 improvement over previous MIR spectroscopic observations of this system. The GTC/CC spectroscopy displays evidence of deeply embedded active galactic nucleus (AGN) activity in both nuclei. The GTC/CC nuclear spectrum of NGC 3690/Arp 299-B1 can be explained as emission from AGN-heated dust in a clumpy torus with both a high covering factor and high extinction along the line of sight. The estimated bolometric luminosity of the AGN in NGC 3690 is 3.2 ± 0.6 × 10 44 erg s −1 . The nuclear GTC/CC spectrum of IC 694/Arp 299-A shows 11.3 μm polycyclic aromatic hydrocarbon emission stemming from a deeply embedded (A V ∼ 24 mag) region of less than 120 pc in size. There is also a continuum-emitting dust component. If associated with the putative AGN in IC 694, we estimate that it would be approximately five times less luminous than the AGN in NGC 3690. The presence of dual AGN activity makes Arp 299 a good example to study such phenomena in the early coalescence phase of interacting galaxies.

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CanariCam: a multimode mid-infrared camera for the Gran Telescopio CANARIAS

Cited by 42 publications

References 1 publication

Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core

Infrared polarimetry of Mrk 231: scattering off hot dust grains in the central core

A compact jet at the infrared heart of the prototypical low-luminosity AGN in NGC 1052

UNCOVERING THE DEEPLY EMBEDDED ACTIVE GALACTIC NUCLEUS ACTIVITY IN THE NUCLEAR REGIONS OF THE INTERACTING GALAXY Arp 299

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