2001gq

2001gq was discovered during program SCP of spring 2001 with instrument CFH12K of the CFHT. It was detected on April 15 and was confirmed April the 17 and 19.

Its spectral identification and the measurement of its redshift (0.671) was obtained thanks to instruments LRIS figure ). The measurement of its redshift was obtained thanks to the lines of its galaxy host.

This supernova was discovered a few days before its maximum of luminosity, it gained from 5 points of space follow-up in R and I and of a point in R and I obtained with the Fors-1 instrument of telescope VLT (table B.18 ).

**Appear B.13:** In green, the spectrum of 2001gq. This spectrum was obtained using the Keck telescope and from the spectrograph on scale ESI on April 22, 2001. The duration is 1800 seconds. In black, the spectrum of the close supernova 1990N observed 7 days before the maximum. To note, the spectrum of 2001gy is rééchantilloné by steps of 5 Å
$\begin{figure}\it\begin{center}\epsfig{file=Images/2001gqspectre, width=12cm}\end{center}\end{figure}$

B.17 table: Summary of the observations of 2001gq.

Telescope	Instrument	Go back to observationa	filter	Expositionb	seeingc
CFHT	Cfht12K	51665.50 $\dag$	I	8640	0.63
CFHT	Cfht12K	51642.54 $\dag$	I	7200	0.81
CFHT	Cfht12K	51998.49	I	10560	0.68
CFHT	Cfht12K	52015.55	I	9240	0.69
CFHT	Cfht12K	52017.38	I	3960	0.77
CFHT	Cfht12K	52018.50	I	3300	0.67
CFHT	Cfht12K	52019.40	I	3300	0.54
VLT	VltFors1	52028.00	I	1199	0.54
CFHT	Cfht12K	52377.48 $\dag$	I	7200	0.51
CFHT	Cfht12K	52382.49 $\dag$	I	1800	0.66
CFHT	Cfht12K	52385.48 $\dag$	I	3000	0.81
CFHT	Cfht12K	52387.34 $\dag$	I	1800	0.74
VLT	VltFors1	52028.00	R	959	0.58
CFHT	Cfht12K	52350.53 $\dag$	R	1200	0.85
CFHT	Cfht12K	52353.49 $\dag$	R	1200	0.84
CFHT	Cfht12K	52377.52 $\dag$	R	2400	0.54
CFHT	Cfht12K	52382.51 $\dag$	R	600	0.75
CFHT	Cfht12K	52387.35 $\dag$	R	600	0.74
CFHT	Cfht12K	52413.29 $\dag$	R	600	0.85
CFHT	Cfht12K	52416.28 $\dag$	R	600	0.73

aDate Julienne $\dag$ Images of reference without the supernova.

B.18 table: Summary of the observations with the space telescope Hubble of 2001gq.

Instrument	Go back to observationa	filtreb	Exposure C
HstWfpc2	52039.37	F814W	2400
HstWfpc2	52047.60	F814W	2400
HstWfpc2	52053.62	F814W	2400
HstWfpc2	52066.53	F814W	4800
HstWfpc2	52039.31	F675W	2300
HstWfpc2	52047.54	F675W	2300
HstWfpc2	52053.56	F675W	2300
HstWfpc2	52066.40	F675W	4700

aDate Julienne $\dag$ second of reference without the supernova.

B.19 table: Magnitudes of some stars of the field of 2001gq.

Stars	I	R
With	20.13 $\pm$ 0.03	20.13 $\pm$ 0.03
B	20.14 $\pm$ 0.05	20.14 $\pm$ 0.05
C	20.84 $\pm$ 0.05	20.84 $\pm$ 0.05
D	19.18 $\pm$ 0.02	19.18 $\pm$ 0.02
E	19.07 $\pm$ 0.04	19.07 $\pm$ 0.04
F	20.85 $\pm$ 0.08	20.85 $\pm$ 0.08
G	21.93 $\pm$ 0.03	21.93 $\pm$ 0.03
H	21.26 $\pm$ 0.06	21.26 $\pm$ 0.06
I	20.00 $\pm$ 0.02	20.00 $\pm$ 0.02

B.20 table: Curve of light of 2001gq in the band R

Phase $\dag$	R $\ddag$
52039.31(0.01)	23.35(0.02)23.37
52047.54(0.01)	23.66(0.03)23.68
52053.56(0.01)	24.06(0.04)24.10
52066.40(0.01)	24.86(0.05)24.95

$\ddag$ standard Magnitude in the filter R

B.21 table: Curve of light of 2001gq in band I

Phase $\dag$	I $\ddag$
52039.37(0.01)	22.76(0.02)c
52047.60(0.01)	23.05(0.03)c
52053.62(0.01)	23.32(0.03)c
52066.53(0.01)	23.84(0.04)c
52019.40(0.01)	23.11(0.03)a
52028.00(0.01)	22.78(0.03)b
52018.50(0.01)	23.42(0.09)a
51998.50(0.01)	28.77(3.80)
52015.50(0.01)	23.43(0.04)a
52017.40(0.01)	23.35(0.07)a

$\ddag$ standard Magnitude in filter I aObservations with the CTIO bObservations with the VLT OBSERVATIONS with HST

**Appear B.15:** Curves of light of 2001gq in standard magnitudes in the filters R and I
$\begin{figure}\it\begin{center} \epsfig{file=Images/2001gq_LC_R.eps, width=12cm}... ...sfig{file=Images/2001gq_LC_I.eps, width=12cm}\vskip 2cm \end{center}\end{figure}$

**Appear B.16:** Curves of light of 2001gq in standard fluxes in the filters R and I
$\begin{figure}\it\begin{center} \epsfig{file=Images/2001gq_LC_flux_R.eps, width=... ...file=Images/2001gq_LC_flux_I.eps, width=12cm}\vskip 2cm \end{center}\end{figure}$