Centro de Estudios de Física del Cosmos de Aragón

JAST/T80/JPLUS Exposure Time Calculator

Help
See Important Update (1st August, 2016)
Observational conditions

 J-PLUS Filters  help

ALL
uJAVA
J0378
J0395
J0410
J0430
gSDSS
J0515
rSDSS
J0660
iSDSS
J0861
zSDSS

 Sky conditions  help

Sky Brightness: Dark
Gray
Bright
Airmass:
Seeing (arcsec):

 Object type  help

Point source (mag)
Photometric Aperture: (")
Extended object (mag/arcsec2)

Note: For point-like sources, the results will be given as a function of the photometric aperture.

Exposure Time Calculator
Fill in the boxes leaving empty the one you want to compute (except the number of exposures).
WARNING: Computations resulting in exposure times close to zero will hang up the procedure
Signal to noise ratio (*)
Magnitude (AB) (*)
TOTAL Exposure time [s]
Number of Exposures
(*) For point like sources, S/N within aperture and magnitude is total magnitude
     For extended objects, S/N within a pixel and magnitude refers to magnitudes/arcsec2
Auxiliary Plots

Magnitude vs Signal to Noise

Magnitude range:
S/N range (*):
Exposure Time NEXP:

Exposure Time vs Signal to Noise

Exposure Time range: NEXP:
S/N range (*):
Magnitude

Magnitude vs Exposure Time

Exposure Time range: NEXP:
Magnitude range:
S/N (*)
(*) For point like sources, S/N within aperture.
     For extended objects, S/N within a pixel.

Authors: Nicolas Gruel; Jesús Varela; David Cristóbal
Comments, bugs, and suggestions: jvarela at cefca.es