Open AccessThe peak luminosity–peak energy correlation in gamma‐ray bursts
Author(s) -
Ghirlanda G.,
Ghisellini G.,
Firmani C.,
Celotti A.,
Bosnjak Z.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2005.00043.x
Subject(s) - redshift , luminosity , astrophysics , physics , energy (signal processing) , collimated light , gamma ray burst , correlation , positive correlation , isotropy , sample (material) , optics , laser , galaxy , mathematics , medicine , geometry , quantum mechanics , thermodynamics
We derive the correlation between the peak luminosity L iso and the peak energy of the ν F ν spectrum E peak using 25 long gamma‐ray bursts (GRBs) with firm redshift measurements. We find that its slope is similar to that of the correlation between the time‐integrated isotropic emitted energy E iso and E peak . For the 16 GRBs in our sample with estimated jet opening angle, we compute the collimation‐corrected peak luminosity L γ , and find that it correlates with E peak . This correlation has, however, a scatter larger than that of the correlation between E peak and E γ (the time‐integrated emitted energy, corrected for collimation), which we ascribe to the fact that the opening angle is estimated through the global energetics. We have then selected a large sample of 442 GRBs with pseudo‐redshifts, derived through the lag–luminosity relation, to test the existence of the L iso – E peak correlation. With this sample we also explore the possibility of a correlation between time‐resolved quantities, namely L p iso and the peak energy at the peak of emission E p peak .