Observers: Christoffer Fremling, Anders Nyholm TAT: Annalisa de Cia, Morgan Fraser No clouds at the start of the night, humidity of ~50%. Seeing~1”. Will attempt EFOSC photometry and spectroscopy. Both followup and classifications planned. CALIBRATIONS: - 20.30UT: PESSTO_bias, PESSTO_calib - 23:50UT: Sunset - 00:15: Flat fields UBVri, mixed up the order of the OBs, some exposures failed - 09:10: Flat fields UBVRi SCIENCE-OBSERVATIONS: EFOSC observations - 00:55 ASASSN-14il, Airmass=, Seeing=1.06” Comment: Increased exposure times because we start early - 01:05 ASASSN-14kp, gr13 Airmass=, Seeing=1.00” Comment: 1x3300 exposure, decent signal - 02:08 PSN1-15p, Classification gr13, Airmass=x, Seeing=0.60” Comment: Ia few days before max, z=0.027 - 02:25 OGLE47, Followup photometry UBVRi, Airmass=x, Seeing=0.66” Comment: - 02:52 ASASSN-14ha, Photometry, U, Airmass=x, Seeing=0.81” - 03:10 OGLE13, Classification gr13, Airmass=1.54, Seeing=0.97” Comment: Ia, high z=0.14, phase about -5d - 03:37 OGLE07, Classification gr13, Airmass=x, Seeing=0.7” Comment: Type II close to max, z=0.060 (SNID and Gelato best matches to IIPs) - 04:08 LSQ14efd Followup photometry, BVRi Airmass=x, Seeing=0.6” - 05:06 STD phot field pg1047, Airmass=1.55, Seeing=0.54” - 05:20 ASASSN-15as, Classification gr13, Airmass=1.x, Seeing=0.55” Comment: Ia z=0.028 -1d (SNID) - 05:30 ASASSN-15az, Classification gr13, Airmass=1.36, Seeing=0.68” Comment: Ia z=0.028 +1d (SNID) - 05:38 OGLE73, Followup photometry BVRi, Airmass=1.5, Seeing=0.5” - 06:40 OGLE73, Followup spectroscopy, gr13 Airmass=1.55, Seeing=0.43” Comment: Repeat obs. of last night. Object centered very carefully on the slit. Centering looked perfect at the start of the exposures. - 08:05 LSQ14gow Classification gr13, Airmass=1.08, Seeing=0.44” Comment: low SNR, High-z Ia?, Gelato +16d, z=0.2 (Ic also decent match) - 08:35 LSQ15z Classification gr13, Airmass=, Seeing=0.51” Comment: Ia z=0.071 after peak SNID ——————————————————————— SCIENCE-CONCLUSIONS: with EFOSC: Followup - ASASSN-14il Phot. followup BVRi - ASASSN-14kp Spec. followup gr13 - OGLE47 Phot. followup UBVRi - ASASSN-14ha Phot. followup U - LSQ14efd Phot. followup BVRi - OGLE73 Phot. followup BVRi, repeated 1x3000 gr13 spectrum attempted last night, this spectrum looks OK, and matches the ones observed Dec. 2014 Classification - PSN1-15p Ia few days before max - OGLE13 high-z Ia z=0.14 before max - OGLE07 type II z=0.06 - ASASSN-15as Ia before max z=0.028 - ASASSN-15az Ia around max z=0.029 - LSQ14gow Ia around max - LSQ15z Ia around max - LSQ14gow looks like high-z type Ia or possibly Ic - LSQ15z Ia z=0.071 after peak |
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