A XSPEC Composite Model Partial Flux Calculations

A
Thread starter Joe Prendergast
Start date Nov 27, 2024
Tags

Flux calculation X-ray

AI Thread Summary

The discussion revolves around performing partial flux calculations using XSPEC with a model that includes a Gaussian component. The user, Joe, has successfully calculated the Gaussian flux contribution, which is 8.31189E-11 erg/s/cm^2, and the total flux of the model as 0.069691 photons (8.5637e-10 ergs/cm^2/s). Joe seeks guidance on converting the Gaussian flux value to counts per second per keV. The thread highlights the need for assistance in this specific conversion process. The conversation emphasizes the technical aspects of XSPEC modeling and flux calculations.

Nov 27, 2024

Joe Prendergast

TL;DR Summary: XSPEC

Hello,
I am running a model in XSPEC: phabs*(pow + cflux*gaussian) on a WSL Ubuntu terminal.
The fit output shows lg10flux = -10.0803 which converts to a flux of 8.31189E-11 erg/s/cm^2. This is correct for the gaussian flux contribution.
The flux command produces:
0.069691 photons (8.5637e-10 ergs/cm^2/s)
This is correct for the entire model.
What I'd like to do is convert the gaussian flux of 8.31189E-11 erg/s/cm^2 to counts/s/keV.
Does anyone know how to do this?
Thanks,
Joe

Thread 'How feasible is home radio astronomy?'

Is a homemade radio telescope realistic? There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs. Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...

View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...

View full post »

Thread 'Visible light Over Large Distances'

How does light maintain enough energy in the visible part of the spectrum for the naked eye to see in the night sky. Also, how did it start of in the visible frequency part of the spectrum. Was it, for example, photons being ejected at that frequency after high energy particle interaction. Or does the light become visible (spectrum) after hitting our atmosphere or space dust or something? EDIT: Actually I just thought. Maybe the EM starts off as very high energy (outside the visible...

View full post »