The Redshift and the Host Galaxy of GRB 980613: A Gamma-Ray Burst from a Merger-induced Starburst?

Djorgovski, S. G.; Bloom, J.; Kulkarni, S. R.

doi:10.1086/376964

Cited by 34 publications

(28 citation statements)

References 44 publications

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“…One immediately sees from Table 4 that the SFRs of the hosts are moderate, in line with the conclusions of Fruchter et al (1999a); Djorgovski et al (2003Djorgovski et al ( , 2001a; Castro-Tirado et al (2001). In Fig.…”

Section: Star-formation Ratessupporting

confidence: 83%

UV star-formation rates of GRB host galaxies

Christensen¹,

Hjorth²,

Gorosabel

2004

A&A

299

357

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Abstract. We study a magnitude-limited sample of 10 gamma-ray burst (GRB) host galaxies with known spectroscopic redshifts (0.43 < z < 2.04). From an analysis of the spectral energy distributions (SEDs), based on published broad-band optical and near-infrared photometry, we derive photometric redshifts, galaxy types, ages of the dominant stellar populations, internal extinctions, and ultraviolet (UV) star-formation rates (SFRs) of the host galaxies. The photometric redshifts are quite accurate despite the heterogeneous nature of the sample: the rms errors are σ(z) = 0.21 and σ(∆z/(1 + z spec )) = 0.16 with no significant systematic offsets. All the host galaxies have SEDs similar to young starburst galaxies with moderate to low extinction. A comparison of specific SFRs with those of high-redshift galaxies in the Hubble Deep Fields shows that GRB hosts are most likely similar to the field galaxies with the largest specific SFRs. On the other hand, GRB hosts are not significantly younger than starburst field galaxies at similar redshifts, but are found to be younger than a sample of all types of field galaxies.

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Section: Star-formation Ratessupporting

confidence: 83%

UV star-formation rates of GRB host galaxies

Christensen¹,

Hjorth²,

Gorosabel

2004

A&A

299

357

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“…When is reported in the literature but is not, we set ¼ À1 (marked with an asterisk; see Appendix A). When multiple references are available (i.e., Jimenez et al 2001;Amati et al 2002; Kulkarni et al 1998;(9) Bloom et al 1999;(10) Groot et al 1998;(11) Lamb et al 1999;(12) Yost et al 2002;(13) Tinney et al 1998;(14) Jaunsen et al 2001;(15) Djorgovski et al 2003;(16) Halpern & Fesen 1998;(17) Djorgovski et al 1998;(18) Frail et al 2003;(19) Frontera et al 2000;(20) Frail et al 1999;(21) Kulkarni et al 1999;(22) Bloom et al 2003a;(23) Vreeswijk et al 2001;(24) Stanek et al 1999;(25) (26) Le Floc'h et al 2002;(27) Masetti et al 2000;(28) Frontera et al 2001;(29) Björnsson et al 2001;(30) Djorgovski et al 1999a;(31) Hurley et al 2000b;(32) Sagar et al 2000;(33) Djo...…”

Section: 3mentioning

confidence: 99%

Toward a More Standardized Candle Using Gamma‐Ray Burst Energetics and Spectra

Friedman

Bloom

2005

ApJ

156

221

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The use of gamma-ray burst (GRB) energetics for cosmography has long been advanced as a means to probe out to high redshifts, to the epoch of deceleration. However, although relatively immune to systematic biases from dust extinction, the prompt energy release in GRBs, even when corrected for jetting geometry, is far from being a standard candle. In this work we explore the cosmographic potential of a GRB standard candle based on the newly discovered relation by Ghirlanda and coworkers between the apparent geometry-corrected energies (E ) and the peak in the rest-frame prompt-burst spectrum (E p ). We present an explicit, self-consistent formalism for correcting GRB energies with a thorough accounting for observational uncertainties. In contrast to other work, we demonstrate that the current sample of 19 GRBs is not yet cosmographically competitive with results from Type Ia supernovae (SNe Ia), large-scale structure, and the microwave background. Although the E p -E relation is a highly significant correlation across a range of cosmologies [0 M , Ã 2], the goodness of fit of the data to a power law (E p / E ) depends strongly on input assumptions. The most important of these assumptions concern the unknown density (and density profile) of the circumburst medium, the efficiency of converting explosion energy to gamma rays, data selection choices for individual bursts (some of which were not included in similar work), and assumptions in the error analysis. Independent of assumptions, with very few low-z bursts, the current sample is most sensitive to M but essentially insensitive to Ã (let alone the dark energy equation of state w). The relation clearly represents a significant improvement in the search for an empirical GRB standard candle but is further hindered by an unknown physical basis for the relation, the lack of a low-z training set to calibrate the relation in a cosmology-independent way, and several major potential systematic uncertainties and selection effects. Until these concerns are addressed, a larger sample is acquired, and attempts are made to marginalize or perform Monte Carlo simulations over the unknown density distribution (which itself may evolve with redshift), we urge caution concerning claims of the utility of GRBs for cosmography and especially attempts to combine the results from GRBs with those of SNe Ia.

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“…From an analysis of photometric redshifts of galaxies in the field of GRB 000210, Gorosabel et al (2003) found that there is no obvious concentration of galaxies around the host. In another case, the afterglow of GRB 980613 was located close to a very compact object inside a complex region consisting of star forming knots and/or interacting galaxy fragments Djorgovski et al 2003). If these host galaxies are associated with the underlying large-scale structure of the universe, then they should show galaxy clustering properties similar to normal galaxies.…”

Section: Introductionmentioning

confidence: 99%

The Galaxy Density Environment of Gamma‐Ray Burst Host Galaxies

Bornancini

Martínez

Lambas

et al. 2004

ApJ

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We analyze cross-correlation functions between gamma-ray burst (GRB) hosts and surrounding galaxies. We have used data obtained with the Very Large Telescope at Cerro Paranal (Chile), as well as public Hubble Space Telescope data. Our results indicate that GRB host galaxies do not reside in high galaxy density environments. Moreover, the host galaxy-galaxy cross-correlations show a relatively low amplitude. Our results are in agreement with the cross-correlation function between star forming galaxies and surrounding objects in the Hubble Deep Field-North (HDF-N).

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The Redshift and the Host Galaxy of GRB 980613: A Gamma-Ray Burst from a Merger-induced Starburst?

Cited by 34 publications

References 44 publications

UV star-formation rates of GRB host galaxies

UV star-formation rates of GRB host galaxies

Toward a More Standardized Candle Using Gamma‐Ray Burst Energetics and Spectra

The Galaxy Density Environment of Gamma‐Ray Burst Host Galaxies

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