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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

32550 results found.

  1. XRF011130: Infrared Observations
  2. GRB011130, Radio Observations
  3. Detection of the X-ray afterglow of GRB011121 by BeppoSAX
  4. GRB011130 (=XRF011130), Optical Observations
  5. XRF011130: NEAT Optical Observations
  6. GRB011130 (=XRF011130): Revised Localization of an X-ray
  7. GRB001109, Radio Monitoring
  8. GRB 011121: Errata URL
  9. GRB 011121
  10. GRB 011121: J-band observations
  11. GRB 011121: NIR observations, host galaxy?
  12. GRB010921 - Milagro GeV/TeV Observations
  13. GRB 011121: HST Scheduled
  14. GRB011121: fainter still
  15. Correction: GCN1157 (GRB 011121)
  16. GRB011121: UBRI Observations
  17. GRB011121
  18. GRB 011121: Radio Observations
  19. GRB 011121 J-Band Astrometry
  20. GRB011121: continued decay
  21. GRB 011121: Detection of Bright IR Counterpart
  22. GRB011121: possible redshift, continued decay
  23. GRB011121: fading behavior
  24. GRB011121: possible optical counterpart
  25. IPN triangulation of GRB011121
  26. GRB 011030: TNG K-band observation
  27. XRF011030: J and K band observations
  28. XRF011030: Chandra Observations
  29. GRB 011030: K-band observations
  30. GRB011030: Z-band observations
  31. GRB 011030 I-band Observation
  32. The X-ray Flash 011030 ('GRB 011030')
  33. The Radio Afterglow from the X-ray Rich GRB 011030
  34. GRB 010921: HST Detection of the Afterglow and Host Galaxy
  35. GRB 000131: HST Detection of the Host Galaxy
  36. GRB 011019 optical observation
  37. Optical observation of SGR 1806-20 at the 6-m SAO telescope
  38. GRB011019: Subaru Optical Observations
  39. GRB 011030 I-band Observations
  40. GRB 011030 K-band Observations
  41. GRB010921, optical observations
  42. GRB 011030, WSRT radio observations
  43. GRB011030 - further refinement WFC position
  44. GRB 011030, Radio observations
  45. GRB011030: radio search
  46. GRB 011030, R-band observations
  47. BeppoSAX ALERT: Possible X-ray rich GRB011030
  48. GRB 010921: Possible supernova component
  49. GRB011019: ROTSE-III optical observations
  50. GRB 010921, I-band observations
  51. GRB011019: Optical observations
  52. GRB011019, optical observations -- correction
  53. GRB011019, optical observations
  54. GRB010921: Spectroscopy of the Host Galaxy
  55. GRB 010921: The afterglow of HETE #1761
  56. Optical Observations of the field of HETE trigger #1793/GRB 011012?
  57. GRB010923 as seen by BeppoSAX GRBM
  58. GRB010928(=H1770): Localization of a Long GRB by HETE
  59. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  60. GRB010921, negative optical observations
  61. GRB010921 field photometry
  62. GRB 010921 DPOSS Images Available
  63. IPN triangulation of GRB010921 (=H1761)
  64. H1761: A Bright GRB Detected by HETE
  65. HETE Trigger #1760 (GRB 010920B?): new optical source = asteroid
  66. GRB001109, Host Galaxy Astrometry
  67. GRB000926, Host Galaxy Observations
  68. GRB001109, Host Galaxy Spectroscopic Observations
  69. Probable SGR or Short Duration GRB Detected by HETE
  70. GCN and HETE status
  71. Dramatic Increase in the Rate of X-ray Bursts Reported by HETE
  72. GRB 010222 - WHT BVRI images
  73. SGR1900+14 burst seen by HETE: BeppoSAX data
  74. GRB 010629 Optical Observations
  75. GRB010629: Optical Observations
  76. SGR1900+14: High Fluence Burst Localized by HETE
  77. GRB010629, optical observations
  78. IPN triangulation of GRB010629
  79. SGR1900+14: Second Burst Localized by HETE
  80. SGR1900+14: A Burst Localized by HETE
  81. Possible burst from SGR1806-20
  82. SGR1806-20: A Second, Intense Burst Localized by HETE
  83. IPN triangulation of GRB010613
  84. IPN triangulation of GRB010612
  85. IPN triangulation of GRB010612
  86. HETE Fully-Automated GCN Notices
  87. GRB000301C: Late-time HST/STIS observation
  88. GRB000418: HST/STIS Second-epoch Observations
  89. X-ray precursors to the large flare from SGR 1900+14
  90. GRB010214, optical observations
  91. SGR 1900+14: No evidence of extended X-ray emission
  92. SGR 1900+14 : RXTE observations
  93. BeppoSAX/NFI Follow-up Observation of SGR 1900+14
  94. SGR1900+14 - correction
  95. SGR1900+14
  96. SGR 1900+14: Correction to GCN 1049
  97. Millimeter observation of SGR 1900+14
  98. SGR 1900+14: Detection of extended X-ray emission
  99. Chandra Observations of SGR 1900+14
  100. SGR 1900+14, Chandra observations

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