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iTelescope - T7 - Deep Field


AstroCamp Observatory. Nerpio, Spain - MPC Code - I89

(TEL T7 0.43-m f/6.8 astrograph + CCD)

UTC +1:00 Madrid Daylight Savings Time is Observed

Minimum Target Elevation: Approx 35 - 45 Degrees

North: 38° 09’ - West: 002° 19’

Elev: 1650m

Operational Notes

Deep Field Telescope. Hybrid Science/Imaging Platorm. Typically used for RVB / Narrowband Imaging, but also carries Photometric V and I filters. FITS and TIF file formats. Dark Frame calibration data is available for 60, 120, 180, 300, 600 second exposures. Binx1 - Binx2.

T7 is a 17" Hybrid platform utilising a large format STL11000M CCD. This is an ABG camera so it lends itself to long exposures on a wide variety of targets. T7 is populated with photometric RVB filters so it stands well in the science stakes as well as a set of narrowband units for amazing Hubble palette imaging. Care however should be taken when using T7 for photometry as its CCD is of the ABG variety. So users should make sure they don't saturate the image as result may not be linear.

IMPORTANT NOTES: T7 is externally Guided: Please limit sub-exposure times to 300 seconds or less for best results.

Instrument Package

CCD: SBIG STL-11000M QE: 50% Peak Full Well: ~50,000e- Anti Blooming Gate (ABG) Dark Current: 0.5 e-/pixel/sec. @ 0º C Pixel Size: 9um Square Resolution: 0.63 arc-secs/pixel Sensor: Frontlit Cooling: Set to -20ºC default Array: 4008 by 2672 (10.7 Mega pixels) FOV: 28.2 x 42.3 arc-mins Filters: Luminance, R, V, B, Ha, Oiii, SII, I Position Angle: 272º

Telescope Optics

OTA: Planewave 17" CDK Optical Design: Corrected Dall-Kirkham Astrograph Aperture: 431mm Focal Length: 2939mm F/Ratio: f/6.8 Guiding: External Mount: Paramount PME

T7 has the following filters:

  • 1- L Luminance, Baader (UV/IR cut)
  • 2- R-Johnson, Custom Scientific
  • 3- V-Johnson, Custom Scientific
  • 4- B-Johnson, Custom Scientific
  • 5- Ha-7nm, Baader (see graph)
  • 6- OIII-8.5nm, Baader (see graph)
  • 7- SII-8nm, Baader (see graph)
  • 8- I-Johnson, Custom Scientific

Baader narrow band graphs (http://tinyurl.com/dxwxgdn)

Transformation Coefficients for T7

  • Tbv= 1.268 ; standard deviation= .004
  • Tvr= 1.028 ; standard deviation= .009
  • Tri= 0.852 ; standard deviation= .009
  • Tb= 0.114 ; standard deviation= .002
  • Tv= -0.192 ; standard deviation= .009
  • Tr= -0.265 ; standard deviation= .006

These use the following definitions (lower case are instrument magnitudes; upper case are reference magnitudes of M67 from Arne Henden’s standard field available at http://binaries.boulder.swri.edu/fields/m67.html )

  • Tb= slope of (B-b)/(B-V)
  • Tv= slope of (V-v)/(V-R)
  • Tr= slope of (R-r)/(R-I)
  • Tij=1 / slope of (i-j)/(I-J)