Error messages Bad background substraction on file sky_T_-10_t_7200_2019-01-01_23:25:56_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-72.771179). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-01_23:25:56_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-21.757593). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_01:30:29_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-106.89468). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_01:30:29_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-34.754551). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_01:30:29_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-77.642151). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_03:35:03_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-87.260834). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_03:35:03_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-13.065575). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_03:35:03_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-64.107597). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_05:39:37_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-88.523300). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_05:39:37_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-12.406805). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_05:39:37_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-50.659050). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_09:48:43_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-559.52100). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_09:48:43_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-1849.4011). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-10_t_7200_2019-01-02_09:48:43_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-1469.1514). Probably contaminated by sun, moon of twilight.