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Table 1

Log-book of the Hα observations in the Coma region.

Yr Date-obs Telescope CCD N pixel Rebin Pixel scale N targets
arcsec
1993 30/4–30/4 SPM2.1 TK-1k 1024 × 1024 1× 0.25 2
1994 30/3–30/3 SPM2.1 TK-1k 1024 × 1024 1× 0.25 1
1995 03/4–03/4 SPM2.1 TK-1k 1024 × 1024 1× 0.30 4
1996 18/4–21/4 SPM2.1 TK-1k 1024 × 1024 1× 0.30 9
1997 09/3–11/3 SPM2.1 TK-1k 1024 × 1024 1× 0.30 12
1999 19/4–19/4 SPM2.1 TK-1k 1024 × 1024 1× 0.30 2
2000 01/3–01/3 INT2.5 EEV-2k × 4k 2048 × 4096 1× 0.33 3
2001 20/4–20/4 SPM2.1 TH-2k 2048 × 2048 2× 0.36 2
2002 18/3–20/3 SPM2.1 Site3 1024 × 1024 1× 0.31 2
2004 12/3–18/3 SPM2.1 Site3 1024 × 1024 1× 0.31 4
2005 08/4–16/4 SPM2.1 Site3 1024 × 1024 1× 0.31 25
2006 29/4–30/4 SPM2.1 Site3 1024 × 1024 1× 0.31 2
2010 15/4–17/4 SPM1.5 e2vm2 2048 × 2048 2× 0.28 8
2010 11/5–14/5 SPM1.5 e2vm2 2048 × 2048 2× 0.28 14
2010 15/4–21/4 SPM2.1 TH-2k 2048 × 2048 2× 0.36 27
2011 25/3–06/4 SPM1.5 Site4 1024 × 1024 1× 0.25 72
2011 25/3–31/3 SPM2.1 e2vm2 2048 × 2048 2× 0.35 146
2012 24/3–28/3 SPM2.1 e2vm2 2048 × 2048 2× 0.35 14
2012 16/4–24/4 SPM2.1 e2vm2 2048 × 2048 2× 0.35 128
2013 07/4–15/4 SPM2.1 e2vm2 2048 × 2048 2× 0.35 143
2013 10/5–13/5 SPM2.1 e2vm2 2048 × 2048 2× 0.35 23
2014 24/4–02/5 SPM2.1 e2vm2 2048 × 2048 2× 0.35 81

Notes. Prior to 2010 galaxies were optically selected, while the proper Hα3 project (follow-up of ALFALFA) began in 2010.

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