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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"

19209 results found.

  1. The X-ray Flash 011030 ('GRB 011030')
  2. Non-triggered burst 011030 ("GRB 011030")
  3. The Radio Afterglow from the X-ray Rich GRB 011030
  4. GRB 010921: HST Detection of the Afterglow and Host Galaxy
  5. Optical observation of SGR 1806-20 at the 6-m SAO telescope
  6. GRB 011030 I-band Observations
  7. GRB 011030 K-band Observations
  8. GRB010921, optical observations
  9. GRB011030 - further refinement WFC position
  10. GRB 011030, Radio observations
  11. GRB011019: A Faint, X-ray Rich GRB localized by HETE
  12. GRB 010921: The afterglow of HETE #1761
  13. Optical Observations of the field of HETE trigger #1793/GRB 011012?
  14. GRB010923 as seen by BeppoSAX GRBM
  15. GRB010928(=H1770): Localization of a Long GRB by HETE
  16. GRB010923(=H1764): A Short Duration GRB Detected by HETE
  17. H1761: A Bright GRB Detected by HETE
  18. Probable SGR or Short Duration GRB Detected by HETE
  19. GCN and HETE status
  20. Dramatic Increase in the Rate of X-ray Bursts Reported by HETE
  21. GRB 010222 - WHT BVRI images
  22. SGR1900+14 burst seen by HETE: BeppoSAX data
  23. GRB010629: Optical Observations
  24. SGR1900+14: High Fluence Burst Localized by HETE
  25. GRB010629: A Burst Localized by HETE
  26. SGR1900+14: Second Burst Localized by HETE
  27. SGR1900+14: A Burst Localized by HETE
  28. Possible burst from SGR1806-20
  29. SGR1806-20: A Second, Intense Burst Localized by HETE
  30. SGR1806-20: Localization by HETE
  31. HETE Fully-Automated GCN Notices
  32. GRB000301C: Late-time HST/STIS observation
  33. GRB010518: a faint BeppoSAX detection
  34. X-ray precursors to the large flare from SGR 1900+14
  35. GRB010427, Gamma Ray Observations
  36. SGR 1900+14: No evidence of extended X-ray emission
  37. SGR 1900+14 : RXTE observations
  38. BeppoSAX/NFI Follow-up Observation of SGR 1900+14
  39. SGR 1900+14: Correction to GCN 1049
  40. GRB 010222 /corrections to VBT data
  41. Millimeter observation of SGR 1900+14
  42. SGR 1900+14: Detection of extended X-ray emission
  43. Chandra Observations of SGR 1900+14
  44. SGR 1900+14, Chandra observations
  45. SGR1900+14, I-band observations
  46. Giant flare from SGR1900+14
  47. GRB010412: BeppoSAX GRBM and WFC observations
  48. IPN Triangulation of GRB010412
  49. REVISED LOCATION OF GRB010326A
  50. GRB 980326: Late-time HST/STIS observations
  51. GRB010222, CXO X-ray observations
  52. GRB010326: Localization by HETE
  53. Duration, ECT, peak flux and fluence of GRB010324
  54. Support extension to the BeppoSAX mission
  55. GRB 010222 - HEGRA GeV/TeV Observations
  56. GRB010222: Chandra X-ray Observatory Observation
  57. GRB010222: Sub-millimeter vanishing act
  58. GRB010222 - Optical observation
  59. GRB010222 - Optical observation
  60. GRB 010222: High-Resolution Keck Spectroscopy
  61. GRB 010214, I-band data
  62. GRB 010222
  63. GRB010222: R-band data
  64. GRB010222, possible increase of optical decay slope
  65. GRB 010222: Optical Observations
  66. GRB010222: Optical decay slope
  67. GRB 010214, Optical Observations
  68. GRB010222: BeppoSAX/NFI Observations
  69. GRB010214B,Gamma Ray Observations
  70. GRB 010220, simultaneous optical observations
  71. GRB010214, candidate optical afterglow
  72. GRB 010214: X-Ray afterglow
  73. GRB010213, Radio Observations
  74. GRB 010214, optical observations
  75. IPN Status Report
  76. HETE Status
  77. IPN/RXTE TRIANGULATION OF GRB010126
  78. GRB010126 Optical Observations
  79. IPN TRIANGULATION OF GRB010126
  80. IPN/RXTE TRIANGULATION OF GRB010126
  81. Optical Observations of GRB 001018 at Keck
  82. IPN TRIANGULATION OF GRB010119 (SHORT/HARD)
  83. IPN TRIANGULATION OF GRB010115
  84. IPN TRIANGULATION OF GRB010109
  85. IPN TRIANGULATION OF GRB010109
  86. IPN triangulation of GRB010104
  87. IPN triangulation of GRB010103
  88. H band observation of GRB 001212
  89. GRB & BeppoSAX: ground operations restored back to 24 hrs a day
  90. IPN triangulation of GRB001219
  91. GRB 001212 Optical Observation
  92. GRB 001212 possible OA in 2MASS
  93. IPN triangulation of GRB001212
  94. Confirmation of IPN position for GRB001204
  95. IPN triangulation of GRB001204 (short/hard)
  96. GRB 001105, further optical observations
  97. WSRT 4.8 GHz observations of GRB001109
  98. IPN triangulation of GRB001120
  99. Optical/NIR observations of GRB001109
  100. GRB 001109: deep JHK upper limits

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