PG 0026+129 is a radio-quiet quasar at a redshift of z = 0.142 (D~ 691 Mpc) with an optical Sy 1.2 classification [veron-cetty_catalogue_2010]. It was detected at radio wavelengths with a compact core and extended kiloparsec-scale biconical emission in the north-south direction while its [O III] emission is unresolved [leipski_radio_2006]. Pioneering MIR observations were performed by [neugebauer_absolute_1979, neugebauer_continuum_1987], followed by [elvis_atlas_1994] and [neugebauer_variability_1999]. PG 0026+129 was also observed in the MIR with ISO [haas_dust_2000] and Spitzer/IRS and MIPS, and appears as a point source in the corresponding MIPS 24 μm image. The IRS LR staring-mode spectrum exhibits prominent silicate 10 and 18 μm emission and a blue spectral slope in νFν-space, but no PAH features were detected (see also [schweitzer_spitzer_2006, schweitzer_extended_2008]). PG 0026+129 was imaged with COMICS in the N11.7 filter in 2006 (unpublished, to our knowledge), and a compact nucleus without further host emission has been weakly detected. More and deeper subarcsecond MIR imaging is required to investigate the source extension. Our nuclear N11.7 photometry is higher but still consistent with the Spitzer spectrophotometry. Therefore, we use the latter to compute the nuclear 12 μm continuum emission estimate corrected for the silicate feature. Comparison with the historical N-band photometry shows apparent flux variations on the order of ~ 17% during the last ~ 30 years. This indicates intrinsic variability in the N-band emission of PG 0026+129 despite uncertainties and systematics of the different instruments, filters and measurement methods.
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] |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
PG 0026+129 | 7.306667 | 13.267500 | N11.7 | PG0026_129_N11.7_2006-10-04T08-19.fits | [Details] | 11.74 | 0.53 | COMICS | 0.133 | 2006.0 | PERP | 10.0 | 0.0 | 90.0 | o06139 | HD2436 | 2006-10-04T08:09:36Z | 2006-10-04T08:19:41Z | 0.16053 | 0.00034 | 4312.7 | False | 45.3 | 6.4 | False | 39.2 | 6.3 | 0.59 | 0.4 | 131.0 | 0.55 | 0.52 | 107.0 |