Fire Emergency: The list of immediate needs is growing and our priorities may need to evolve with circumstances. Your gift to the UCO Director’s Discretionary Fund today will provide the flexible support necessary for Director Max to address needs as they arise in this rapidly changing situation.

NOTE: All interrupts at Keck are considered to be 1 hour in length even if the visit takes less than 1 hour. UCO time accounting will follow the Keck model for consistency.


Time Domain Astronomy Observations at Keck


Please view guidelines for ToO observations on Keck here (PDF).

Updated December 2018

Please view guidelines for Cadence observations on Keck here (PDF).
Updated February 2020


Policy for UC Keck Time for Targets of Opportunity

Currently approved UC ToO Projects at Keck, updated July 1st 2020.

Semester 2020B:

Prop. No. PI Instruments
U026 Filippenko (LRIS, HIRES, DEIMOS, NIRC2) - UC only ToO
U080 Foley (OSIRIS/NIRC2) - UC only ToO


Semester 2020A:

Prop. No. PI Instruments
U179 Filippenko (LRIS/HIRES/DEIMOS/NIRC2) - UC only ToO
U182 Prochaska (All) - Partnership ToO
U213 Kasen (All) - Partnership ToO
U215 Foley (OSIRIS/NIRC2) - UC only ToO


Semester 2019B:

Prop. No. PI Instruments
U168 Foley (OSIRIS/NIRC2) - UC only ToO
U176 Kasen (All) - Partnership ToO
U186 Prochaska (LRIS/MOSFIRE/DEIMOS/ESI/KCWI/NIRES) - UC only ToO


Semester 2019A:

Prop. No. PI Instruments
U195 Kasen (All) - Partnership ToO
U176 Prochaska (LRIS-ADC/LRISp-ADC/MOSFIRE/DEIMOS/ESI/KCWI/NIRSPEC/NIRES) - UC only ToO


Semester 2018B:

Prop. No. PI Instruments
U072 Kasen (All) - Partnership ToO
U073 Prochaska (LRIS-ADC/LRISp-ADC/MOSFIRE/DEIMOS/ESI/KCWI/NIRSPEC/NIRES) - Partnership ToO


Semester 2018A:

Prop. No. PI Instruments
U020 Valenti (LRIS-ADC/HIRESr/HIRESb/DEIMOS) - UC only ToO
U030 de Pater (NIRC2-NGS) - Partnership ToO
U200 Prochaska (LRIS-ADC/LRISp-ADC/MOSFIRE/DEIMOS/ESI/KCWI/NIRSPEC/NIRES) - Partnership ToO
U200 Prochaska (LRIS-ADC/LRISp-ADC/MOSFIRE/DEIMOS/ESI/KCWI/NIRSPEC/NIRES) - UC only ToO
U241 Foley (OSIRIS-NGS/OSIRIS-LGS/NIRC2-NGS/NIRC2-LGS) - UC only
U272 Foley (All) - Partnership ToO
U272 Foley (All) - UC only ToO



Semester 2017B:

Prop. No. PI Instruments
U041 de Pater (NIRC2-NGS) - UC only ToO
U053 Max (OSIRIS-LGS, NIRC2-LGS) - Partnership ToO
U113 Valenti (LRIS-ADC, HIRESr, HIRESb, DEIMOS) - UC only ToO
U115 Prochaska (LRIS-ADC, LRISp-ADC, MOSFIRE, DEIMOS, ESI, KCWI, NIRSPEC) - UC only ToO
U139 Foley (OSIRIS-NGS, OSIRIS-LGS, NIRC2-NGS, NIRC2-LGS) - UC only ToO
U145 Filippenko (LRIS-ADC, HIRESr, DEIMOS, NIRC2-NGS, NIRC2-LGS) - UC only ToO


Semester 2017A:

Prop. No. PI Instruments
U101 Max (NIRC2-LGS) - UC only ToO
U101 Max (NIRC2-NGS) - Partnership ToO
U031 Valenti (LRIS, Hiresr, Hiresb, Deimos) - UC only ToO
U045 de Pater (NIRC2-NGS) - UC only ToO
U073 Prochaska (LRIS, LRIS-ADC, LRISp, LRISp-ADC, MOSFIRE, DEIMOS, ESI, NIRSPEC) - UC only ToO
U118 Filippenko (LRIS-ADC, HIRESr, MOSFIRE, DEIMOS, NIRC2-LGS) - UC only ToO


Semester 2016B:

Prop. No. PI Instruments
U150 Filippenko (DEIMOS, HIRES, LRIS, NIRC2-LGS)
U041 de Pater (NIRC2)
U054 de Pater (NIRC2)
U134 Max (NIRC2-LGS)


Semester 2016A:

Prop. No. PI Instruments
U038 Filippenko (HIRESr)
U038 Filippenko (NIRC2-LGS)
U018 de Pater (NIRC2-NGS)


Semester 2015B:

Prop. No. PI N/A
U064Hr Filippenko
U064N2L Filippenko
U015N2 de Pater
U035N2L Max


Semester 2015A:

Prop. No. PI N/A
U048Hr Filippenko
U028OL Max
U048N2L Filippenko