3C 327 is a FR II radio source identified with the flattened elliptical galaxy LEDA 56797 at a redshift of z = 0.1048 (D ~ 505 Mpc) with a Sy 1 nucleus [veron-cetty_catalogue_2010]. 3C 327 features supergalactic-scale double radio lobes in the east-west directions without prominent jets (PA~ 100∘; e.g., [baum_extended_1988, leahy_study_1997]). 3C 327 was first detected in the MIR with IRAS, and was followed up with Spitzer/IRS and MIPS observations. A point-like nucleus was detected in the MIPS 24 μm image. Our corresponding nuclear MIPS 24 μm flux agrees with the literature values by [shi_far-infrared_2005] and [dicken_origin_2008]. The IRS LR staring-mode spectrum possibly shows weak silicate 10 μm absorption, strong forbidden high ionization lines and a red spectral slope in νFν-space but no PAH emission (see also [dicken_spitzer_2012]). Silicate absorption would be atypical for a type I AGN. 3C 327 was imaged with VISIR in the broad SIC filter in 2005, and a compact nucleus was weakly detected [van_der_wolk_dust_2010]. It appears extended in the image (FWHM ~ 1.2 kpc) but a second epoch of deep subarcsecond MIR imaging is required to verify this extension. [van_der_wolk_dust_2010] conclude that the observed MIR emission must be dominated by thermal dust emission because of the high excess above the predicted synchrotron emission from extrapolating the radio wavelengths. Our nuclear SIC flux is 20% lower than theirs but matches the Spitzer spectrophotometry.
Object | RA [deg] | Dec [deg] | Filter | Image | Info | λ_c [um] | HWHM [um] | Instr | Pix. size [arcsec/pix] | T_exp [s] | Mode | Chop Throw [arcsec] | Chop Angle [deg] | Rot [deg] | Prog Id | Cal. Star | Cal. Date | Date Obs. | Factor [mJy/ct] | Err. Factor [mJy/ct] | Cal. Flux [mJy] | Upper Lim. Gauss? | F_Gauss [mJy] | E(F_Gauss) [mJy] | Upper Lim. PSF? | F_PSF [mJy] | E(F_PSF) [mJy] | Cal. Maj. [arcsec] | Cal. Min. [arcsec] | Cal. PA. [deg] | Maj. Ax [arcsec] | Min. Ax [arcsec] | Pos. Ang. [deg] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3C 327 | 240.614167 | 1.965556 | SIC | 3C327_SIC_2005-07-02T01-45.fits | [Details] | 11.85 | 2.34 | VISIR | 0.075 | 1794.0 | PARA | 8.0 | 0.0 | 0.0 | 075.B-0621(A) | HD133165 | 2005-07-02T01:35:02Z | 2005-07-02T01:45:07Z | 0.0575 | 0.00221 | 5332.7 | False | 58.4 | 7.6 | False | 40.3 | 1.8 | 0.56 | 0.47 | 120.0 | 0.66 | 0.61 | 97.0 |