Photometry and spectroscopy of the GRB 970508 optical counterpart

Science

Volumn 279, Issue 5353, 1998, Pages 1011-1014

  Castro Tirado, Alberto J ^a   Gorosabel, Javier ^a   Benítez, Narciso ^a   Wolf, Christian ^a   Fockenbrock, Ralf ^a   Martínez González, Enrique ^a   Kristen, Helmuth ^a   Broeils, Adrick ^a   Pedersen, Holger ^a   Greiner, Jochen ^a   Costa, Enrico ^a   Feroci, Marco ^a   Piro, Luigi ^a   Frontera, Filippo ^a   Nicastro, Luciano ^a   Palazzi, Eliana ^a   Bartolini, Corrado ^a   Guarnieri, Adriano ^a   Masetti, Nicola ^a   Piccioni, Adalberto ^a   Mignoli, Marco ^a   Wold, Magrethe ^a   Lacy, Mark ^a   Birkle, Kurt ^a   Broadhurst, Tom ^a   Brandt, Søren ^a   Lund, Niels ^a   more..

^a NONE

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; ASTRONOMY; GAMMA RADIATION; PHOTOMETRY; PRIORITY JOURNAL; SPECTROSCOPY; SYNCHROTRON; ULTRAVIOLET RADIATION;

EID: 0042804877     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.279.5353.1011     Document Type: Article

References (50)

1. For an extensive review of gamma ray burst observations, see G. J. Fishman and C. A. Meegan, Annu. Rev. Astron. Astrophys. 33, 415 (1995).
2. L. Piro, L. Scarsi, R. C. Butler, Proc. SPIE 2517, 169 (1995).
3. F. Frontera et al., Astron. Astrophys. Suppl. Ser. 122, 357 (1997).
4. R. Jager et al. , ibid. 125, 57 (1997).
5. E. Costa et al., IAU Circ. 6649 (1997).
6. J. Heise et al., IAU Circ. 6652 (1997).
7. C. Kouveliotou et al., IAU Circ. 6660 (1997).
8. L. Piro et al., IAU Circ. 6656 (1997); L. Piro et al., Astron. Astrophys., in press.
9. L. Piro et al., IAU Circ. 6656 (1997); L. Piro et al., Astron. Astrophys., in press.
10. The wide U-band filter that we used was RGO#U8, with a central wavelength of 3557 Å, a half-peak wavelength of 344 Å, and a 74% transmission (M. Broxterman, personal communication).
11. H. E. Bond, IAU Circ. 6655 (1997).
12. Originally, the U-band results seemed to be in disagreement with those published by T. Galama et al. (31), but after comparing our data, we agreed on the estimated extinction coefficient value, that is, on the magnitudes of several field stars near the optical transient, and the discrepancy has been removed. See also T. Galama et al., in preparation.
13. A. Guarnieri et al., Astron. Astrophys. 328, L13 (1997); T. Galama et al., Nature 387, 479 (1997). P. J. Groot et al., IAU Circ. 6584 (1997); J. van Paradijs et al., Nature 386, 686 (1997).
14. A. Guarnieri et al., Astron. Astrophys. 328, L13 (1997); T. Galama et al., Nature 387, 479 (1997). P. J. Groot et al., IAU Circ. 6584 (1997); J. van Paradijs et al., Nature 386, 686 (1997).
15. A. Guarnieri et al., Astron. Astrophys. 328, L13 (1997); T. Galama et al., Nature 387, 479 (1997). P. J. Groot et al., IAU Circ. 6584 (1997); J. van Paradijs et al., Nature 386, 686 (1997).
16. A. Guarnieri et al., Astron. Astrophys. 328, L13 (1997); T. Galama et al., Nature 387, 479 (1997). P. J. Groot et al., IAU Circ. 6584 (1997); J. van Paradijs et al., Nature 386, 686 (1997).
17. A. J. Castro-Tirado et al., IAU Circ. 6657 (1997); S. Djorgovski et al., Nature 387, 876 (1997).
18. A. J. Castro-Tirado et al., IAU Circ. 6657 (1997); S. Djorgovski et al., Nature 387, 876 (1997).
19. H. Pedersen et al., Astrophys. J., in press.
20. Redshift z ≥ 0.835 was inferred from Keck spectroscopy on 11 May and 5 June 1997 on the basis of a metal-line absorption system [M. R. Metzger et al., Nature 387, 879 (1997)] and a faint [O II] emission line (32).
21. G. M. Beskin et al., in Flares and Flashes, J. Greiner, H. W. Duerbeck, R. E, Gershberg, Eds. (Lecture Notes in Physics 454, Springer, Berlin, 1995), pp. 330-333.
22. A 1-hour-long flare with a rise of 0.46 mag in 32 min and a very rapid decline of 0.52 mag in 10 min was observed in the B band for the BL Lac object 3C 66A [G. Z. Xie et al., Astron. Astrophys. Suppl. Ser. 106, 361 (1994)].
23. J. I. Katz, Astrophys. J. 432, L107 (1994).
24. A. J. Castro-Tirado et al., IAU Circ. 6598 (1997); J. Gorosabel et al., in preparation.
25. A. J. Castro-Tirado et al., IAU Circ. 6598 (1997); J. Gorosabel et al., in preparation.
26. P. Mészáros and M. J. Rees, Astrophys. J. 405, 278 (1993); ibid. 418, L59 (1993).
27. P. Mészáros and M. J. Rees, Astrophys. J. 405, 278 (1993); ibid. 418, L59 (1993).
28. _, ibid. 476, 232 (1997).
29. op ∼ 2 days.
30. R. A. M. J. Wijers, M. J. Rees, P. Mészâros. Mon. Not. R. Astron. Soc. 288, L51 (1997)
31. J. I. Katz and T. Piran, Astrophys. J. 490, 772 (1997); and references therein.
32. Like GRO J0422+32 [A. J. Castro-Tirado, J. L. Ortiz, J. Gallego, Astron. Astrophys. 322, 507 (1997)] and GRO J1655-40 [J. A. Orosz, R. A. Remillard, Ch. D. Bailyn, J. E. McClintock, Astrophys. J. 478, L83 (1997)].
33. Like GRO J0422+32 [A. J. Castro-Tirado, J. L. Ortiz, J. Gallego, Astron. Astrophys. 322, 507 (1997)] and GRO J1655-40 [J. A. Orosz, R. A. Remillard, Ch. D. Bailyn, J. E. McClintock, Astrophys. J. 478, L83 (1997)].
34. S. K. Chakrabarti and P. J. Wiita, Astrophys. J. 411, 602 (1993). See also J. J. Brainerd, ibid. 394, L33 (1992).
35. S. K. Chakrabarti and P. J. Wiita, Astrophys. J. 411, 602 (1993). See also J. J. Brainerd, ibid. 394, L33 (1992).
36. M. Vietri, ibid. 488, L105 (1997).
37. The fastest x-ray flare ever seen in an extragalactic object was observed in May 1994 in the BL Lac object PKS 2155-304. The x-ray flare was followed by a broader, lower amplitude extreme-UV flare ∼1 day later and a broad, low-amplitude UV flare ∼ 2 days later [E. Pian et al., Astrophys. J. 486, 784 (1997)].
38. M. Tavani, Astrophys. J. 466, 768 (1996); E. Waxman, ibid. 485, L5 (1997).
39. M. Tavani, Astrophys. J. 466, 768 (1996); E. Waxman, ibid. 485, L5 (1997).
40. T. Galama et al., IAU Circ. 6655 (1997).
41. M. R. Metzger et al., IAU Circ. 6676 (1997).
42. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
43. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
44. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
45. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
46. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
47. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
48. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
49. S. Djorgovski et al., IAU Circ. 6658 (1997); IAU Circ. 6660 (1997); B. Schaefer et al., IAU Circ. 6658 (1997); P. Groot et al., IAU Circ. 6660 (1997); C. Chevalier and S. Ilovaisky, IAU Circ. 6663 (1997); A. Kopylov et al., ibid.; IAU Circ. 6671 (1997); A. Fruchter and L. Bergeron, IAU Circ. 6674 (1997); (31, 32).
50. We are grateful to M. Santos-Lleó, M. Más-Hesse, B. Montesinos, P. Rodríguez-Pascual, L. Sánz Fernández de Córdoba, E. Fernandes-Vieira, J. R. Acarreta, A. Alberdi, M. Cervino, T. Galama, N. Schartel, D. Thompson, and R. Wijers for fruitful conversations, and to J. Gallego, J. Zamorano, and M. Fernández for their good will. We are grateful to the director of NOT for his continued support of this program, and to J. Perez-Mercador for his encouragement. J. Greiner is supported by the Deutsche Agentur für Raumfahrtangelegenheiten. C.B., A.G., N.M., and A.P. acknowledge the support of the Universitè di Bologna. The BeppoSAX team acknowledges the Italian Space Agency for support. The Calar Alto German-Spanish Observatory is operated jointly by the Max-Planck Institut für Astronomie in Heidelberg and the Comisión Nacional de Astronomia, Madrid. The WHT is operated by the Royal Greenwich Observatory in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias. The Loiano Telescope is operated by Osservatorio Astronomico di Bologna and Universitè di Bologna.