Can a gamma-ray bursts be observed at different wave length show different redshift ?
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We measure gamma-ray burst redshifts in the optical or near infrared range. That's where the spectral lines are. We presume, on solid theoretical ground, that the redshifts at longer and shorter wavelengths are the same, but there are no spectral features that can confirm this.
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$\begingroup$ I would like to know about any research that is conducted to get spectral lines in the gamma range of gamma-ray burst. $\endgroup$– Edy A.Commented Dec 30, 2023 at 5:20
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$\begingroup$ @EdyA. Sounds like a new question. $\endgroup$ Commented Dec 30, 2023 at 13:00