Sasmirala Individual Information for MCG-1-13-25
Description
MCG-1-13-25 is a spiral galaxy at a redshift of z = 0.0159 (D ~65.7 Mpc) with a Sy 1.2 nucleus [pietsch_new_1998], which was first discovered with HEAO [brissenden_multiwaveband_1987]. It is a member of the nine-month BAT AGN sample. Spitzer/IRAC, IRS and MIPS observations of MCG-1-13-25 are available and show a nearly unresolved source in the corresponding images. The IRS LR staring-mode spectrum exhibits strong silicate 10 and 18 μm emission with a weak PAH 11.3 μm feature and a slightly blue spectral slope in νFν-space (see also [weaver_mid-infrared_2010]). We observed MCG-1-13-25 with VISIR in three narrow N-band filters in 2009 and weakly detected a possibly marginally resolved MIR nucleus (FWHM ~ 0.41arcsec ~ 130 pc). However, at least a second epoch with deeper subarcsecond-resolution MIR images is required to verify this extension. Our nuclear photometry provides fluxes consistent with the Spitzer spectrophotometry. Therefore, we use the IRS spectrum to estimate the nuclear 12 μm continuum emission corrected for the silicate feature. Note however, that the nuclear fluxes would be significantly lower if the presence of subarcsecond-extended emission can be verified For now, the resulting synthetic flux is then scaled by half of the ratio between FνPSF and FνGau to account for the possibly nuclear extension.
- [brissenden_multiwaveband_1987] R. J. V. Brissenden, I. R. Tuohy, R. A. Remillard, D. A. H. Buckley, G. V. Bicknell, H. V. Bradt, and D. A. Schwartz. Multiwaveband studies of x-ray selected active galactic nuclei . Proceedings of the Astronomical Society of Australia , 7 pp. 212–215, 1987.
- [pietsch_new_1998] W. Pietsch, K. Bischoff, Th. Boller, S. Doebereiner, W. Kollatschny, and H.-U. Zimmermann. New active galactic nuclei detected in ROSAT all sky survey galaxies. i. verification of selection strategy . A&A , 333 pp. 48–62, May 1998.
- [weaver_mid-infrared_2010] K. A. Weaver, M. Meléndez, R. F. Mushotzky, S. Kraemer, K. Engle, E. Malumuth, J. Tueller, C. Markwardt, C. T. Berghea, R. P. Dudik, L. M. Winter, and L. Armus. Mid-infrared properties of the swift burst alert telescope active galactic nuclei sample of the local universe. i. emission-line diagnostics . ApJ , 716 pp. 1151–1165, June 2010.
Images
Optical image (DSS, red filter). Displayed are the central 4 arcmin with North being up and East to the left. The colour scaling is linear with white corresponding to the median background (BG) and black to the 0.01% pixels with the highest intensity.
Spitzer MIR images. Displayed are the inner 40 arcsec with North being up and East to the left. The colour scaling is logarithmic with white corresponding to median BG and black to the 0.1% pixels with the highest intensity. The label in the bottom left states instrument and central wavelength of the filter in micron (I: IRAC, M: MIPS).
Subarcsecond-resolution MIR images sorted by increasing filter central wavelength. Displayed are the inner 4 arcsec with North being up and East to the left. The colour scaling is logarithmic with white corresponding to median BG and black to the 75% of the highest intensity of all images in units of sig_bg. The inset image (where present; either bottom or top right) shows the central arcsecond of the PSF from the calibrator star, scaled to match the science target. The labels in the bottom left state instrument and filter names (C: COMICS, M: Michelle, T: T-ReCS, V: VISIR).
SEDs
MIR SED. The description of the symbols in all the SED plots (where present) is the following: Grey crosses and solid lines mark the Spitzer/IRAC, MIPS and IRS data. The colour coding of the other symbols is as follows: green for COMICS, magenta for Michelle, blue for T-ReCS and red for VISIR data. Darker-coloured solid lines mark spectra of the corresponding instrument. The black filled circles mark the nuclear 12 and 18 micron continuum emission estimate from the data (where present). The ticks on the top axis mark positions of common MIR emission lines, while the light grey horizontal bars mark wavelength ranges affected by the silicate 10 and 18 micron features.