$\star$ An example of lightcurve

Figure 8.25 shows the lightcurve of 2000fr built with the observations of space follow-up. The galaxy host of the supernova is sufficiently far away from the supernova to make it possible to make an estimate of fluxes by aperture photometry corrected for the opening. We checked that the use of a larger aperture did not involve an appreciable increase in the flux of the supernova.

Figure 8.25: Curve of light of 2000fr. This supernova has a redshift of 0.543. It was discovered in a very early way what made it possible to obtain a significant follow-up space and a sampling of the lightcurve out of I very good. Fluxs are expressed in a number of photoelectrons a second for a aperture of $0.5' '$. Fluxs of this supernova were determined by a aperture of 5 pixels.

Figure 8.26 represents the lightcurve of 2001go obtained by subtraction of images. Flux is estimated by aperture on the subtraction. Once again, we do not note significant variation of flux by increasing the value of the aperture.

Lastly, figure 8.27 represents the lightcurve of 2001gn obtained by subtraction of flux of opening centered on the current images and the reference. Once again, it was checked that the increase in the aperture did not involve significant variation of flux.

Figure 8.26: Curve of light of 2001go. This supernova has a redshift of 0.552. Fluxs are expressed in a number of photoelectrons a second for a ray of opening of $0.5' '$. Fluxs of this supernova were determined by a aperture of 5 pixels on a subtraction of the images of follow-up and image of reference.

Figure 8.27: Curve of light of 2001gn. This supernova has a redshift of 1.1. Fluxs are expressed in a number of photoelectrons a second for a aperture of $0.5' '$. Fluxs of this supernova were determined by a subtraction of flux of opening of 4 pixels of the images of follow-up and image of reference.