Sasmirala Individual Information for LEDA 178130
Description
LEDA 178130 is a morphologically-undetermined galaxy at a redshift of z = 0.0350 (D ~ 160 Mpc) with a little-studied Sy 2 nucleus [veron-cetty_catalogue_2010] discovered with RXTE in X-rays [revnivtsev_identification_2006, parisi_accurate_2009]. It belongs as well to the nine-month BAT AGN sample. No MIR observations are reported but an archival Spitzer/IRS LR staring-mode spectrum is available. LEDA 178130 appears as a compact source in WISE. The IRS spectrum exhibits, unexpectedly to a type II AGN, silicate emission, very weak PAH features and an emission peak at ~ 18 μm in νFν-space. The arcsecond-scale MIR SED thus rather indicates an unobscured AGN without significant star formation. We imaged this object with VISIR in three narrow N-band filters in 2009 and detected a possibly marginally resolved nucleus without any further host emission (FWHM~ 0.5arcsec ~ 0.4 kpc). However, at least another epoch of subarcsecond MIR imaging is required to confirm this extension. The nuclear VISIR photometry is consistent with the IRS spectrum, but it would be significantly lower if the presence of subarcsecond-extended emission can be verified.
- [parisi_accurate_2009] P. Parisi, N. Masetti, E. Jiménez-Bailón, V. Chavushyan, A. Malizia, R. Landi, M. Molina, M. Fiocchi, E. Palazzi, L. Bassani, A. Bazzano, A. J. Bird, A. J. Dean, G. Galaz, E. Mason, D. Minniti, L. Morelli, J. B. Stephen, and P. Ubertini. Accurate classification of 17 AGNs detected with Swift/BAT . A&A , 507 pp. 1345–1358, December 2009.
- [revnivtsev_identification_2006] M. Revnivtsev, S. Sazonov, E. Churazov, and S. Trudolyubov. Identification of four RXTE slew survey sources with nearby luminous active galactic nuclei . A&A , 448 pp. L49–L52, March 2006.
- [veron-cetty_catalogue_2010] M.-P. Véron-Cetty and P. Véron. A catalogue of quasars and active nuclei: 13th edition . A&A , 518 pp. 10, July 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.