Filter Profile Service
A repository of Filter information for the VO

Swift/UVOT.UVW22140.32085.715973480667.7760.0SwiftUVOTUVOT UVW2 filter effective area
Swift/UVOT.UVM22272.72245.816992964533.8770.3SwiftUVOTUVOT UVM2 filter effective area
Swift/UVOT.UVW12688.52684.116144730801.9981.4SwiftUVOTUVOT UVW1 filter effective area
Swift/UVOT.U3492.73521.030184781662.51480.5SwiftUVOTUVOT U filter effective area
X
Swift/UVOT.U
Filter Description

Filter ID (?) :Swift/UVOT.U
Description (?) :UVOT U filter effective area
Phot.System (?) :UVOT
Detector Type (?) :Photon counter
Band Name (?) :U
Obs. Facility (?) :Swift
Instrument (?) :UVOT
Comments (?) :Take into account that there is a time-dependent, and filter-dependent decline in sensitivity for the UVOT (which reaches as much as ~30% in UVW2) since launch, and that the filter effective areas provided reflect the case at approximately mission start, so any computation of expected output in the UVOT at a given epoch after mission start, should take these degradation factors into account. The current document describing the degradation is available at

https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/swift/docs/uvot/

 
Mathematical properties

Property Calculated Specified Unit
λmean (?) : 3492.67 ------- (Angstrom)
λcen (?) : 3468.51 ------- (Angstrom)
λeff (?) : 3520.95 ------- (Angstrom)
λpeak (?) : 3692.50 ------- (Angstrom)
λpivot (?) : 3467.05 ------- (Angstrom)
λphot (?) : 3541.22 ------- (Angstrom)
λmin (?) : 3017.59 ------- (Angstrom)
λmax (?) : 4781.22 ------- (Angstrom)
Weff (?) : 662.50 ------- (Angstrom)
FWHM (?) : 778.49 ------- (Angstrom)
Af/AV (?) : 1.62 ------- ()

Effective Area

Data file: ascii, VOTable

Reference for filter response: HEASARC CALDB

   
Calibration properties

Vega System
PropertySpecified Calculated Unit
Zero Point (?) : ------- 3.580e-9(erg/cm2/s/A)
  ------- 1480.55(Jy)
ZP Type (?) : Pogson
PhotCal ID (?) : Swift/UVOT.U/Vega
 

AB System
PropertySpecified Calculated Unit
Zero Point (?) : ------- 8.781e-9(erg/cm2/s/A)
  ------- 3631.00(Jy)
ZP Type (?) : Pogson
PhotCal ID (?) : Swift/UVOT.U/AB
 

ST System
PropertySpecified Calculated Unit
Zero Point (?) : ------- 3.631e-9(erg/cm2/s/A)
  ------- 1501.50(Jy)
ZP Type (?) : Pogson
PhotCal ID (?) : Swift/UVOT.U/ST
 


Filter added: 2014-01-17 16:30:37
Last update: 2019-04-01 12:50:44
Swift/UVOT.white4003.83885.7159778203548.12268.1SwiftUVOTUVOT white filter effective area
Swift/UVOT.B4378.04346.337024995866.24059.8SwiftUVOTUVOT B filter effective area
Swift/UVOT.V5439.65411.449336001655.73636.2SwiftUVOTUVOT V filter effective area
 

Filter Plots

© SVO,   5124 filters available,   Last update: 2019-11-30
 
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 SVO Filter Profile Service (http://svo2.cab.inta-csic.es/theory/fps/) supported from the Spanish MINECO through grant AYA2017-84089

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