0.28-m f/2.2 RASA 11 (Bareket Astro) + QHY one-shot colour, 3.76 um Observed at Kinneret Observatory with a one-shot colour camera; the red channel of the Bayer matrix, used as an approximation to Johnson R. No colour transformation was applied. Differential magnitudes, instrumental zero point (target minus an ensemble of 4 comparison stars). A field star falls in the target's sky annulus; the annulus was widened to 26.9-30.7 px to exclude it.
0.28-m f/2.2 RASA 11 (Bareket Astro) + QHY one-shot colour, 3.76 um Observed at Kinneret Observatory with a one-shot colour camera; the green channel of the Bayer matrix, used as an approximation to Johnson V. No colour transformation was applied. Differential magnitudes, instrumental zero point (target minus an ensemble of 12 comparison stars). A field star falls in the target's sky annulus; the annulus was widened to 26.9-30.7 px to exclude it. The star field chart shows the channel R selection; the comparison stars are chosen per channel and differ slightly in G.
0.28-m f/2.2 RASA 11 (Bareket Astro) + QHY one-shot colour, 3.76 um Observed at Kinneret Observatory with a one-shot colour camera; the blue channel of the Bayer matrix, untransformed, hence TB. Differential magnitudes, instrumental zero point (target minus an ensemble of 11 comparison stars). A field star falls in the target's sky annulus; the annulus was widened to 26.9-30.7 px to exclude it. The star field chart shows the channel R selection; the comparison stars are chosen per channel and differ slightly in B.
