Error messages Bad background substraction on file sky_T_-15_t_7200_2020-01-01_23:26:13_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-103.50147). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-01_23:26:13_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-162.22302). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-01_23:26:13_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-411.57004). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-01_23:26:13_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-791.12170). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_01:30:46_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-108.14398). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_01:30:46_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-176.43871). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_01:30:46_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-462.71991). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_01:30:46_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-891.59253). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_03:35:20_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-106.74822). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_03:35:20_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-230.63409). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_03:35:20_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-593.61688). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_03:35:20_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-1189.4165). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_05:39:53_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 435.5nm (-118.15999). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_05:39:53_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-191.59082). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_05:39:53_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-493.89792). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_05:39:53_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-1003.1758). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_09:49:00_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 546.0nm (-361.30823). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_09:49:00_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 569.0nm (-888.41492). Probably contaminated by sun, moon of twilight. Bad background substraction on file sky_T_-15_t_7200_2020-01-02_09:49:00_el90:0:0_az90:0:0-dark_sp_cs_cp_re_li.cxy at wavelength 615.5nm (-1528.6361). Probably contaminated by sun, moon of twilight.