Changes between Version 67 and Version 68 of WikiStart


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Timestamp:
Mar 10, 2022, 2:26:58 PM (3 years ago)
Author:
Conchi Cárdenas Vázquez
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  • WikiStart

    v67 v68  
    1111It is currently equipped with a scientific grade 2kx2k back-illuminated, nitrogen-cooled SITe CCD -- identical to cameras used e.g. at [http://www.caha.es Calar Alto Observatory]. With a pixel size of 15umx15um it provides a field of view of 18.8x18.8 arcmin. A specially crafted manual filter slider allows unvignetted observations through a wide range of filters, including the standard series of UBVRI as well as an SDSS z' filter and a superb collection of high-performance narrow band interference filters for OII,OIII, H beta, H alpha, SII and SII-continuum (off-line passband). Unguided observations can be as long as 180s, giving you a limiting magnitude of ~19.5mag in the R-band.
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    13 [[Image(M51_Poster.jpg, left, width=370, margin-right=30, title="M51 with the 70 cm telescope", longdesc="M51 with the 70cm telescope")]]
     13 {{{#!html
     14<h4 style="text-align: left" >
     15M51 with the 70cm telescope ( © Victor Marian)
     16</h4>
     17}}} 
     18[[Image(M51_Poster.jpg, left, width=370, margin-right=30, title="M51 with the 70 cm telescope", longdesc="M51 with the 70cm telescope (© Victor Marian)")]]
    1419
    1520Typical **seeing** conditions are around **2 arcsec** in the visible, but can be as good as 1arcsec. Being located quite outside the city the brightening of the sky due to street illumination is acceptable, and using one of the interference filters gives a pitch-black sky indeed, allowing the acquisition of stunning images of emission nebulae like e.g. the Crab Nebula M1 shown on this page.