Pretty Pictures


During the commissioning of the Blue Channel of the LBC @ LBT camera, we obtained images of highly spectacular objects to obtain "pretty pictures".
We provide also the original fits mosaics used to obtain the images.
These images have been obtained with preliminary versions of calibration data and procedure and should not be used for scientific purposes.


VV-124 UGC48 Galaxy
Thricromy image of the UGC48 Dwarf Galaxy

M76 - Dumpbell Nebulae
Thricromy image of the M76 Nebula.

Lulin Comet observed in 20-02-2009
Thricromy image of the LULIN Comet.

UGC 525
Thricromy image of a barred spiral galaxy in the AndromedaXIV field.

IC2473
Thricromy image of a barred spiral galaxy with ring features.

M33
Thricromy image of giant spiral galaxy M33 (astrometry by Mario Radovich).

NGC5675 and UGC09350
Thricromy image of the irregular merging galaxy NGC5675 and the UGC09350 in the deep field of the GRB080319B.
The NGC5675 galaxy is near the FOV border so many ccds' bad pixels are present.

NGC2770
Thricromy image of NGC2770 spiral galaxy in the z-SLOAN, Y-FAN+V-BESSEL and U-BESSEL filters.
This is one of firsts image to be taken in the 'binocular' mode by the LBCTeam during the commissioning of the Red Channel (image properties) - (BLUE_RED comparison).

NGC1491
Bicromy image of NGC1491 nebula in the r-SLOAN and I-BESSEL filters.
This is one of firsts image to be taken in the 'binocular' mode by the LBCTeam during the commissioning of the Red Channel.

NGC5907
Thricromy image of NGC5907 spiral galaxy in the r-SLOAN, g-SLOAN and (U-BESSEL+SDT_Uspec) filters.

SN2005cf
Thricromy image of SN2005cf supernova in the r-SLOAN, V-BESSEL and B-BESSEL filters.

M16 - Eagle Nebula
Thricromy(no dithered!) of M16 Eagle Nebula in the r-SLOAN, g-SLOAN and SDT_Uspec filters.

NGC6946
Thricromy image of NGC6946 spiral galaxy in the V-BESSEL, B-BESSEL and U-BESSEL filters.

SN2006jc
Thricromy image of SN2006jc supernova in the r-SLOAN, V-BESSEL and B-BESSEL filters.

M101
Thricromy image of M101 spiral galaxy in the r-SLOAN, g-SLOAN and SDT_Uspec filters.

IC2574
Thricromy image of IC2574 star forming galaxy in the V-BESSEL, B-BESSEL and U-BESSEL filters.

NGC5719
Thricromy image of NGC5719 in the V-BESSEL, B-BESSEL and U-BESSEL filters.

A611
Thricromy image of A611 gravitational Arch in the V-BESSEL, B-BESSEL and U-BESSEL filters.

M81 - NGC3031
Thricromy image of M81 spiral galaxy (Galex Red channel - V-BESSEL and B-BESSEL for Green and Blue channel).
comparison between LBC V-BESSEL mosaic and HST image the M81 spiral galaxy taken during the SDT (view)

M67 - Open Cluster
Full resolution tricromy of M67 with LBC U-BESSEL mosaic images taken during the commissioning time and LBC B-BESSEL / V-BESSEL mosaic images taken during the SDT time

M31 - Andromeda Galaxy
Comparison between LBC U-BESSEL mosaic of the M31 galaxy taken during the Commissioning Time with Galex and Spitzer telescopes (authors: Giacomo Beccari & Paolo Montegriffo from INAF-OABo)

NGC2023 - Horse Head Nebula
V and U mosaics made on observation performed during the Commissioning Time

NGC2419 - Globular Cluster
VBU tricromy made on observation performed during the Commissioning and Science Demonstration Times

M1 - Crab Nebula
full size jpg (RVB), full size jpg (VBU), mosaic fits.gz file U-BESSEL, mosaic fits.gz file B-BESSEL, mosaic fits.gz file V-BESSEL, mosaic fits.gz file r-SLOAN

V838 Monoceros - SN echo
full size jpg (R_V+B_U tricromy), mosaic fits.gz file U-BESSEL, mosaic fits.gz file B-BESSEL, mosaic fits.gz file V-BESSEL, mosaic fits.gz file r-SLOAN

CL2244 - Gravitation Arch
full size jpg (RVB), full size jpg (VBU), mosaic fits.gz file U-BESSEL, mosaic fits.gz file B-BESSEL, mosaic fits.gz file V-BESSEL, mosaic fits.gz file r-SLOAN

Abell576 - Galaxy Cluster
full size jpg (R_V+B_U tricromy), mosaic fits.gz file U-BESSEL, mosaic fits.gz file B-BESSEL, mosaic fits.gz file V-BESSEL, mosaic fits.gz file r-SLOAN

Science Data

Subaru SXDS Deep Field, RGB-thricromy of 1.7h in V-BESSEL filter, 1.56h in B-BESSEL filter and 11.7h in U-BESSEL filter
full resolution JPG image
U-BESSEL ExposureMap, B-BESSEL ExposureMap, V-BESSEL ExposureMap
q0933 - Steidel Field
LBC-Steidel Field (U-BESSEL filter and TotExpoTime=6.2hours) in comparison with Original Steidel Field @KPNO 4mt Mayall (Un filter and TotExpoTime=10hours) for three different zoom levels and same SNR.

20 minutes image in the U band, with 0.7 arcsec seeing, pointed at:
RA = 60 & DEC = 20

mosaic fits.gz file U-BESSEL


Pretty Picture Pipeline


    The used pipeline for pretty pictures consists of some standard reduction steps each one with a particular time elapsed:

  • XTalk correction crosstalking the four chips to the same ADU level -> about 4.306 CPU seconds for each 4-chip frame
  • prereduction concerning de-biasing, flat-fielding and sky-concentration correction -> about 26.291 CPU seconds for each 4-chip frame
  • astrometry finding local and global astrometry solution -> about 1.24 CPU minutes for each 4-chip frame
  • swarping and mosaic coadding applying the global astrometry solution to each chip's frame and coadding the resampled chips (eventually subtracting background) -> about 26.291 CPU seconds for each 4-chip frame
  • standard stars calibration finding median FWHM and running daophot to cross-correlate catalogs with psf matching alghorithm (see commissioning standards link) -> about 15 CPU minutes for each 4-chip frame
  • tricromy image generation stiff's run to create a tricromy from 3 band images -> about 53.3 CPU seconds for each 4-chip frame



commissioning: back