Sasmirala Individual Information for IRAS 13349+2438
Description
IRAS 13349+2438 is a quasar and narrow-line Sy 1 galaxy at a redshift of z = 0.1076 (D ~ 483 Mpc; see [lee_ionized_2013] for a dedicated comprehensive multiwavelength study). It was the first radio-quiet quasar discovered in the infrared by [beichman_discovery_1986], who observed this object with Palomar 5 m/BOLO1 in 1985 in the N-band. In 2000, IRAS 13349+2438 was observed with Palomar 5 m/MIRLIN [gorjian_10_2004], followed by Spitzer/IRC in 2005 and Spitzer/IRAC in 2009. A slightly resolved MIR nucleus was detected in all cases. Our IRAC 5.8 and 8.0 μm photometry is consistent with the values published in [kishimoto_mapping_2011] but significantly higher than the IRS LR staring mode spectrum. The latter is relatively featureless, showing weak silicate 10 μm emission, no prominent PAH emission, and a blue spectral slope in νFν-space (see also [wu_spitzer/irs_2009, lee_ionized_2013]). VISIR observations of IRAS 13349+2438 in two narrow N-band filters were performed in 2009. The MIR nucleus has a smaller FWHM than the corresponding standard star but still larger than the resolution limit. Therefore, it remains uncertain, whether the nucleus is marginally resolved in the MIR at subarcsecond resolution. The nuclear photometry matches the IRS spectrum and the values in [kishimoto_mapping_2011]. These authors have also observed IRAS 13349+2438 interferometrically with MIDI using several baselines and marginally resolved the MIR nucleus (but see [burtscher_diversity_2013]).
- [beichman_discovery_1986] C. A. Beichman, B. T. Soifer, G. Helou, T. J. Chester, G. Neugebauer, F. C. Gillett, and F. J. Low. Discovery of an infrared-loud quasar . ApJL , 308 pp. L1–L5, September 1986.
- [burtscher_diversity_2013] L. Burtscher, K. Meisenheimer, K. R. W. Tristram, W. Jaffe, S. F. Hönig, R. I. Davies, M. Kishimoto, J.-U. Pott, H. Röttgering, M. Schartmann, G. Weigelt, and S. Wolf. A diversity of dusty AGN tori. data release for the VLTI/MIDI AGN large program and first results for 23 galaxies . A&A , 558 pp. 149, October 2013.
- [gorjian_10_2004] V. Gorjian, M. W. Werner, T. H. Jarrett, D. M. Cole, and M. E. Ressler. 10 micron imaging of seyfert galaxies from the 12 micron sample . ApJ , 605 pp. 156–167, April 2004.
- [kishimoto_mapping_2011] M. Kishimoto, S. F. Hönig, R. Antonucci, F. Millour, K. R. W. Tristram, and G. Weigelt. Mapping the radial structure of AGN tori . A&A , 536 pp. 78, December 2011.
- [lee_ionized_2013] Julia C. Lee, Gerard A. Kriss, Susmita Chakravorty, Farid Rahoui, Andrew J. Young, William N. Brandt, Dean C. Hines, Patrick M. Ogle, and Christopher S. Reynolds. The ionized absorber and nuclear environment of IRAS 13349+2438: multi-wavelength insights from coordinated chandra HETGS, HST STIS, HET and spitzer IRS . MNRAS , 430 pp. 2650–2679, April 2013.
- [wu_spitzer/irs_2009] Yanling Wu, Vassilis Charmandaris, Jiasheng Huang, Luigi Spinoglio, and Silvia Tommasin. Spitzer/IRS 5-35 μm low-resolution spectroscopy of the 12 μm seyfert sample . ApJ , 701 pp. 658–676, August 2009.
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.