Type Ia SN rate R_Ia as function of redshift z (lower horizontal axis) and age (upper horizontal axis) assuming the CSFR of Madau & Dickinson (2014). Each marker-color pair corresponds to one reference in the literature: Li et al. 2011b (open red triangles); Neill et al. 2006 (filled blue stars); Barris & Tonry 2006 (open red pentagons); Graur & Maoz 2013 (filled blue hexagons); Madgwick et al. 2003 (filled magenta circles); Poznanski et al. 2007 (open black diamonds); Cappellaro et al. 1999 (filled red squares); Frohmaier et al. 2019 (open blue triangles); Barbary et al. 2012 (open red stars); Melinder et al. 2012 (filled cyan pentagons); Blanc et al. 2004 (filled red hexagons); Hardin et al. 2000 (filled red circles); Kuznetsova et al. 2008 (open magenta diamonds); Graur et al. 2014 (open lime squares); Perrett et al. 2012 (open black triangles); Dilday et al. 2010 (open lime stars); Rodney et al. 2014 (open black pentagons); Okumura et al. 2014 (open lime hexagons); Botticella et al. 2008 (filled cyan circles); Dahlen et al. 2004 (open lime diamonds); Rodney & Tonry 2010 (open black squares); Cappellaro et al. 2015 (open magenta triangles); Neill et al. 2007 (open blue stars); Graur et al. 2011 (filled magenta pentagons); Pain et al. 2002 (filled magenta hexagons); Dilday et al. 2008 (filled blue diamonds); Tonry et al. 2003 (open magenta squares); Dahlen et al. 2008 (open lime triangles); Desai et al. 2024 (solid black circle). The curves represent the best fits for the assumed DTDs (labeled in the legend). Upper right panel gives a zoomed-out version of the upper left one (enclosed by the dashed lines) without showing the error bars for the sake of visualization. Bottom panels illustrate the confidence intervals (±1σ) of the Type Ia SN rate computed from the errors in CSFR, assuming the DTDs indicated in each legend.