<p>I am struggling to find references that give precise definitions to these concepts. Even in PhD theses on the subject of gamma-ray astrophysics, for example, students do not define it precisely or they just give them as proportional to quantity &quot;x&quot; or &quot;y&quot;, for example the square root of time or effective area. Can you recommend me where this is fully described for students entering the field just now?</p>

CC BY-SA 4.0
2022-09-30T10:16:45.217Z
The definition of SNR is simple: "the ratio of the strength of an electrical or other signal carrying information to that of unwanted interference." and any search engine will give you that and flux sensitivity. What have you found when searching?
Rory Alsop
CC BY-SA 4.0
2022-09-30T11:17:09.543Z
I don't think minimum detectable flux sensitivity has a precise definition. You must define it when you use it.
ProfRob
<astrophysics><gamma-rays>
Where can I find definitions of minimum detectable flux sensitivity and signal to noise ratio?
user11518235
# Where can I find definitions of minimum detectable flux sensitivity and signal to noise ratio?

(Asked by: username_0 on 2022-09-30)

I am struggling to find references that give precise definitions to these concepts. Even in PhD theses on the subject of gamma-ray astrophysics, for example, students do not define it precisely or they just give them as proportional to quantity "x" or "y", for example the square root of time or effective area. Can you recommend me where this is fully described for students entering the field just now?

**Tags:** astrophysics, gamma-rays

> **Comments:**
> **username_1**: The definition of SNR is simple: "the ratio of the strength of an electrical or other signal carrying information to that of unwanted interference." and any search engine will give you that and flux sensitivity. What have you found when searching?  
> **username_2**: I don't think minimum detectable flux sensitivity has a precise definition. You must define it when you use it.  

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