SVO Filter Profile Service

Keck :W.M. Keck Observatory
Keck/ESI :The Echellette Spectrograph and Imager (ESI) is a visible-wavelength, faint-object, imager and single-slit spectrograph in operation at the Cassegrain focus of the Keck II telescope since 1999.

Keck filters: ESI LRIS LWS NIRC2 NIRSPEC OSIRIS

Filter ID	λ_ref	λ_mean	λ_eff	λ_min	λ_max	W_eff	ZP_ν	ZP_λ	Obs. Facility	Instrument	Description
Keck/ESI.B_fil	4444.44	4480.85	4433.10	3713.95	5410.02	962.67	4078.77	6.19e-9	Keck	ESI	ESI B filter (filter only)
Keck/ESI.B	4481.83	4516.45	4467.55	3733.29	5413.35	913.05	4092.40	6.11e-9	Keck	ESI	ESI B filter (+CCD)
Keck/ESI.V	5441.95	5464.40	5420.33	4886.78	6398.46	804.79	3651.57	3.7e-9	Keck	ESI	ESI V filter (+CCD)
Keck/ESI.V_fil	5443.95	5466.46	5422.25	4886.60	6400.01	808.08	3650.31	3.69e-9	Keck	ESI	ESI V filter (filter only)
Keck/ESI.R	6649.05	6676.85	6620.71	5989.68	7424.00	1050.02	2925.85	1.98e-9	Keck	ESI	ESI R filter (+CCD)
Keck/ESI.R_fil	6656.13	6684.12	6627.62	5991.33	7424.96	1038.77	2922.94	1.98e-9	Keck	ESI	ESI R filter (filter only)

Filter Plots

If your research benefits from the use of the SVO Filter Profile Service, we would appreciate if you could include the following acknowledgement in your publication:

This research has made use of the Spanish Virtual Observatory (https://svo.cab.inta-csic.es) project funded by MCIN/AEI/10.13039/501100011033/ through grant PID2020-112949GB-I00

and we would appreciate if you could include the following references in your publication:

The SVO Filter Profile Service. Rodrigo, C., Solano, E., Bayo, A., 2012; https://ui.adsabs.harvard.edu/abs/2012ivoa.rept.1015R/abstract
The SVO Filter Profile Service. Rodrigo, C., Solano, E., 2020; https://ui.adsabs.harvard.edu/abs/2020sea..confE.182R/abstract