Vernikos-Eugenidis optical CCD imaging camera (VEC)

This camera, funded through the “ARISTEIA” program undertaken by the “X-ray & Cosmology group” and the “Eugenides Foundation”. It is constructed by the Astronomical Research Cameras, Inc. and it consists of a 4096 x 4096 (15 microns) Fairchild, back illuminated chip. It is a liquid nitrogen CCD, giving a fov of 10’x10’ (side port).

  • Model: Astronomical research cameras, Inc, GENIII

  • Status: To be commissioned

  • Detector: 4kx4k Fairchild

  • FOV: 10’x10′

  • Scale (“/pixel): 0.17

  • CCD sensor: Fairchild imaging CCD486, back-illuminated, Grade 1

  • CCD Format: 4096×4096, 15 micron pixel size (~0.17″)

  • CCD field of view: 10 arcmin

  • Installation: AGU’s side port (current use ~10′ FOV)
    AGU’s side port + focal reducer (future use ~30′ FOV)

Vernikos-Eugenidis optical CCD imaging camera (VEC)

Camera filter wheel

The filter unit contains 2 filter wheels with 6 filter stacks each with an optically free diameter of 62 mm. The filter unit can be attached to the four side ports and to the main port.

  • Wheel 1 is free for use by the astronomer with changeable filters with a thickness up to 5mm. There are 6 filter adapters, which can easily be disassembled from the wheel.
  • Outside of the filter unit the required filter can be mounted. A protection ring fixes the filter inside the adapter. Then the adapter can be assembled back to the filter wheel by fixation of one screw.
  • Wheel 2 is occupied with filters U, B, V, R, I and a neutral glass with a thickness of 3mm and an optically free aperture of 64 mm.

Aristarchos filters for CCD imaging

Emission line CWL (Å) BW (Å) T max (%) Diameter (mm)
[O II] 3726+ [O II] 3729 3731 25 69.91 64
He II 4686 4690 30 76.57 64
Ηβ 4861 4865 30 77.70 64
[O III] 5007 5011 30 83.91 64
[O III] 5007 gal. set 5035 80 85.34 64
[O III] 5007 gal. set 5100 80 88.33 64
[O III] 5007 gal. set 5200 80 88.35 64
CONT. BLUE 5700 70 90.81 64
[O I] 6300 6304 30 87.22 64
Hα 6563 6567 17 69.60 64
Hα 6563+[N II] 6583 6578 40 88.02 64
[N II] 6583 6588 17 79.60 64
CONT. RED 6680 100 77.57 64
[S II] 6717 + 6731 6727 40 81.60 64

Emission line CWL (Å) BW (Å) T max (%) Diameter (mm)
u 3500 330 69.60 64
v 4110 170 96.03 64
b 4680 180 91.57 64
y 5490 240 80.87 64
z >8319 97.82 64

https://helmos.astro.noa.gr/wp-admin/post.php?post=1466&action=edit#

Band CWL (Å) BW (Å) T max (%) Diameter (mm)
U 3700 1000 56.0 64
B 4300 2000 68.0 64
V 5300 2200 85.0 64
R 5600 3500 83.0 64
I 7800 4000 89.0 64

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