All Questions
Tagged with photometry luminosity
9 questions
0
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0
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103
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Luminosity function calculation
I have M_UV(absolute UV magnitudes) and redshifts of some high z sources and I want to fit UVLF for them.
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- 79
2
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0
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63
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BVR photometry and Luminiscense
I have the values from B, V and R filters. How do I obtain the total luminescence of a star?
My ultimate aim is to find the relative masses and luminescence of various stars/galaxies in a galactic ...
- 241
1
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78
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Magnitude cuts in different bands/surveys
I have data on around 142,000 galaxies. Some of these galaxies have apparent magnitude data in different bands. For example, many of my galaxies have SDSS PSF data in ugriz bands,GALEX FUV, GALEX NUV, ...
- 11
3
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694
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DIY Sky Quality Meter: Conversion between Illuminance and Luminance
I am trying to create a homemade Sky Quality Meter (SQM) using a TSL2591 light sensor. This sensor measures Illumination (lux), but SQMs measure Luminance (mpsas). I have seen that there are many ...
- 31
2
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1
answer
207
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Converting Light curve to Luminosity
So I'm currently working around a specific variable star, α Ori and I want to determine it's luminosity...I do only have the light curve (driven from V-optical photometric band - Johnson V from AAVSO)....
- 105
3
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1
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1k
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How to convert luminosity at rest frame wavelength of 1450 A to absolute magnitude at 1450 A?
How do I convert the luminosity (erg sec$^{-1}$ Hz$^{-1}$) of a quasar at a rest frame wavelength of 1450 Angstroms to absolute magnitude at the same wavelength?
I know that the bolometric ...
- 187
4
votes
1
answer
724
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Convolve a SED with a filter. Is convoluting the mathematical operation?
I know that in order to get the Flux of a star (or something else) in a particular filter from its SED (luminosity per unit wavelength), I need to convolve the spectrum (SED) with the filter response. ...
- 450
3
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1
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968
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Why do different instrumental filters use different magnitude systems (Vega vs AB)?
Suppose I wanted to construct the spectral energy distribution (SED) of an object. Further suppose I observe this object through the 9 broad-band filters using the Subaru Suprimecam (just for an ...
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7
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1
answer
6k
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How can I convolve a template spectrum with a photometric filter response spectrum?
Suppose I have a template stellar population spectrum (say, from Bruzual & Charlot 2003) which runs from like 1000 Angstroms to 160,000 Angstroms and which has x-axis wavelength units of Angstroms ...
- 723