<p>Lets assume I have a source and receive $8 \times 10^{-20}$ ${\rm Wm}^{-2}$ in (400-750) nm filter. How do you convert this received flux to the unit Jansky, is there a formula? (Ultimately, I want to express this flux in magnitude AB.)</p>

CC BY-SA 3.0
2016-12-19T19:00:21.100Z
Just check the Wikipedia page for the Jansky: https://en.wikipedia.org/wiki/Jansky
Phiteros
CC BY-SA 3.0
2016-12-20T08:52:44.040Z
Your source has a given flux in [energy/time], but Jansky is a measure of flux _density_ in [energy/time/frequency bin] or, equivalently, [energy/time/wavelength bin]. Have a look at the link given by Phiteros, and the answer to the question [Conversion of magnitudes to Jansky and MAGPHYS](http://astronomy.stackexchange.com/q/12541/5264), which I think is so close to your question that I'm actually voting to close yours as a duplicate.
pela
<light><observational-astronomy><magnitude><units>
${\rm W/m}^2$ to Jansky
Alex
# ${\rm W/m}^2$ to Jansky

(Asked by: username_0 on 2016-12-19)

Lets assume I have a source and receive $8 \times 10^{-20}$ ${\rm Wm}^{-2}$ in (400-750) nm filter. How do you convert this received flux to the unit Jansky, is there a formula? (Ultimately, I want to express this flux in magnitude AB.)

**Tags:** light, observational-astronomy, magnitude, units

> **Comments:**
> **username_1**: Just check the Wikipedia page for the Jansky: https://en.wikipedia.org/wiki/Jansky  
> **username_2**: Your source has a given flux in [energy/time], but Jansky is a measure of flux _density_ in [energy/time/frequency bin] or, equivalently, [energy/time/wavelength bin]. Have a look at the link given by username_1, and the answer to the question [Conversion of magnitudes to Jansky and MAGPHYS](http://astronomy.stackexchange.com/q/12541/5264), which I think is so close to your question that I'm actually voting to close yours as a duplicate.  

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