<p>My question is simple: if I have an RMS value (the standard deviation for my background) at 1 sigma, and I also have the zero point of my observation, how can I transform that value into the limiting magnitude of my observation?</p>
<p>Note that I'm working with optical data; units are adu while zero point is in ABmag</p>

CC BY-SA 4.0
2023-11-26T19:23:51.597Z
standard deviation and zeropoint in what units and in what data?
ProfRob
CC BY-SA 4.0
2023-11-28T05:55:06.937Z
I'm working with optical data, units are adu while zero point is in ABmag
user19416164
<magnitude><flux>
converting rms to limit flux
user19416164
# converting rms to limit flux

(Asked by: username_0 on 2023-11-26)

My question is simple: if I have an RMS value (the standard deviation for my background) at 1 sigma, and I also have the zero point of my observation, how can I transform that value into the limiting magnitude of my observation?

Note that I'm working with optical data; units are adu while zero point is in ABmag

**Tags:** magnitude, flux

> **Comments:**
> **username_1**: standard deviation and zeropoint in what units and in what data?  
> **username_0**: I'm working with optical data, units are adu while zero point is in ABmag  

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## 0 answers

