<p>The bolometric magnitude of a quasar can be determined by the same method as a star (using total energy radiated)......but for the fact that quasars do not radiate isotropically and this distribution is dependant on wavelength
A further complication comes as many photons are absorbed and re-emitted , etc
Some standard methods of calculation can be found here......
<a href="https://academic.oup.com/mnras/article/408/3/1598/1074070" rel="nofollow noreferrer">Quasar bolometric corrections</a></p>

CC BY-SA 4.0
2019-05-01T11:26:56.017Z
2019-05-01T11:26:56.017Z
Danish 
<p>How can I convert the observed magnitude to Bolometric Luminosity? I know the relation for the star but should it be same for a Quasar? Basically I want to convert the X-axis of this plot to luminosity (or mass). </p>

<p><a href="https://i.sstatic.net/rckSN.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/rckSN.png" alt="enter image description here"></a></p>

<black-hole><observational-astronomy><astrophysics><supermassive-black-hole><quasars>
How to convert the observed magnitude of a Quasar to it's bolometric luminosity?
Arpan Das
# How to convert the observed magnitude of a Quasar to it's bolometric luminosity?

(Asked by: username_0 on 2019-05-01)

How can I convert the observed magnitude to Bolometric Luminosity? I know the relation for the star but should it be same for a Quasar? Basically I want to convert the X-axis of this plot to luminosity (or mass).

[![enter image description here](https://i.sstatic.net/rckSN.png)](https://i.sstatic.net/rckSN.png)

**Tags:** black-hole, observational-astronomy, astrophysics, supermassive-black-hole, quasars

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## 1 answers

### Answer by username_1 on 2019-05-01. Score: 1

The bolometric magnitude of a quasar can be determined by the same method as a star (using total energy radiated)......but for the fact that quasars do not radiate isotropically and this distribution is dependant on wavelength
A further complication comes as many photons are absorbed and re-emitted , etc
Some standard methods of calculation can be found here......
[Quasar bolometric corrections](https://academic.oup.com/mnras/article/408/3/1598/1074070)


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