Sasmirala – Individual Information for NGC 3312

Description

NGC 3312 is a highly-inclined disturbed spiral galaxy at a redshift of z = 0.0096 (D ~ 48.4 Mpc) with a little-studied LINER nucleus [veron-cetty_catalogue_2010]. No Spitzer observations are available. In the WISE images, a compact MIR nucleus embedded within spiral-like host emission is visible. We observed the nuclear region of NGC 3312 with VISIR in the PAH2 filter in 2009 but failed to clearly detect the nucleus [asmus_mid-infrared_2011]. In 2010, we followed up with PAH2_2 imaging and detected an unresolved nucleus without any further host emission. Owing to the lack of information, no conclusion about the nature of this object can be drawn.

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.

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.

Photometry details and reduced FITS files

ObjectRA
[deg]
Dec
[deg]
FilterImageInfoλ_c
[um]
HWHM
[um]
InstrPix. size
[arcsec/pix]
T_exp
[s]
ModeChop Throw
[arcsec]
Chop Angle
[deg]
Rot
[deg]
Prog IdCal. StarCal. DateDate 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]
NGC 3312159.260417-27.565000PAH2NGC3312_PAH2_2009-07-15T22-40.fits[Details]11.250.59VISIR0.075725.0PARA8.045.00.0083.B-0536(C)HD991672009-07-15T23:59:59Z2009-07-15T22:40:47Z0.012710.0001715044.4True8.4N/ATrue8.4N/A0.40.38162.0N/AN/AN/A
NGC 3312159.260417-27.565000PAH2_2NGC3312_PAH2_2_2010-12-29T07-18.fits[Details]11.880.37VISIR0.0751986.0PARA8.045.00.0086.B-0349(C)HD756912010-12-29T07:11:59Z2010-12-29T07:17:45Z0.018760.0001610819.2False7.71.0False7.21.00.30.365.00.340.2985.0