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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.

Advanced Search Examples (click to copy):

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

19279 results found.

  1. GRB 051221B: Swift-XRT Team Refined Analysis
  2. GRB 060218: optical/nIR observations at La Palma
  3. GRB060219: SDSS pre-burst observations
  4. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  5. GRB060218: Swift/XRT refined position of a possible burst
  6. Further UVOT Observations of the Candidate Optical Afterglow for GRB 060218
  7. GRB 060218: Swift-BAT detection of a possible burst
  8. GRB 060213: optical afterglow not confirmed
  9. GRB 060211B: Skynet Observations
  10. GRB 060213: IPN localization
  11. GRB 060211A: Further refined analysis of the Swift burst
  12. GRB060121: optical observations
  13. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  14. GRB 050826: Optical Afterglow and Host Galaxy
  15. GRB 060210: Further refined analysis of the Swift-BAT burst
  16. GRB 060211B: Swift/BAT refined analysis
  17. GRB 060211B: Swift-XRT Team refined analysis
  18. GRB 060210: Optical Observations
  19. GRB 060211A: Swift XRT Team Refined Analysis
  20. GRB 060210: Refined analysis of the Swift-BAT burst
  21. GRB060210: Swift XRT Refined Analysis
  22. GRB060206, optical observations
  23. GRB 060210 : Xinglong and Lulin optical limit
  24. GRB 060210: optical evolution
  25. GRB 060210: Swift detection of a burst
  26. GRB 060206: WSRT Radio Observations
  27. GRB 060121 : WIDGET Pre-trigger limit
  28. GRB 060206: optical observations at Asiago
  29. GRB 060206: Super-LOTIS observations
  30. GRB 060206: Swift-BAT refined analysis
  31. GRB060206: Swift-BAT detection of a burst
  32. GRB 060204A: Swift XRT upper limit
  33. GRB 060204B: Swift-BAT refined analysis
  34. GRB 060204A: further INTEGRAL results
  35. GRB060204B, optical observation
  36. GRB 060203: Swift-BAT refined analysis
  37. GRB 060202: PROMPT Observations
  38. GRB 060202: GETS observation
  39. GRB 060202: Gemini-N J, H, K_s observations
  40. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  41. GRB 060202: Refined analysis of the Swift-BAT burst
  42. GRB 060121: Gemini Late-time Observations
  43. GRB 060130: PROMPT Observations
  44. GRB 060123: Gemini spectroscopy of the putative host galaxy
  45. GRB 060130: further INTEGRAL IBIS results
  46. GRB 060121: Confirmation of NIR Afterglow
  47. GRB 060123: Swift refined analysis of an unusual GRB
  48. GRB 060121: Probable Detection of NIR Afterglow
  49. GRB 060124: HETE detection and spectrum of the main peak
  50. GRB060124: detailed XRT analysis
  51. GRB 060124: XRT refined analysis
  52. GRB060124: optical observations at Asiago
  53. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  54. GRB060123: SDSS pre-burst observations
  55. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  56. GRB 060117: Suzaku WAM observation of the prompt emission
  57. GRB 060111B: Suzaku WAM observation of the prompt emission
  58. GRB 060121: Swift XRT refined analysis
  59. Konus-Wind observation of GRB 060121
  60. GRB060121 - SDSS pre-burst observations
  61. GRB 060121 (=H4010): Results of preliminary spectral analysis
  62. GRB 060116: photometric redshift - the farthest GRB?
  63. Konus-Wind observation of GRB 060117
  64. GRB 060116: possible I-J dropout
  65. GRB 060117: Refined analysis of the Swift-BAT burst
  66. GRB 060116: VLT optical observations
  67. GRB 060116: Refined analysis of the Swift-BAT burst
  68. GRB 060116: XRT refined analysis
  69. GRB 060110: XRT position and analysis
  70. GRB 060116 : Lulin optical limit
  71. GRB 060115: Refined analysis of the Swift-BAT burst
  72. GRB 060115: Swift XRT refined analysis
  73. GRB 060108: Evidence for an XRT Position Offset
  74. GRB 060111B: Swift XRT refined analysis
  75. GRB 060111B: MITSuME detection of optical afterglow
  76. GRB 060111B: Refined analysis of the Swift-BAT burst
  77. GRB 060111B: Swift detection of a burst
  78. GRB 060111: Swift-BAT Refined Analysis
  79. GRB060111.2:_MASTER optical limit
  80. GRB 060111: Swift detection of a burst
  81. GRB 060110: Swift-BAT refined analysis
  82. GRB 060109: Swift-BAT refined analysis
  83. GRB 060108: z-band imaging from Gemini-North
  84. GRB 060110: IR Candidate Afterglow
  85. GRB 060110: Optical observation
  86. GRB 060110: Correction
  87. Correction to GRB 060109 XRT analysis
  88. GRB 050110: IR Observations
  89. GRB 060109: Refined Swift-XRT analysis
  90. GRB 060108: a dark burst?
  91. GRB 060108: Refined XRT analysis
  92. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  93. GRB060108: SDSS pre-burst observations
  94. GRB 060108: Refined analysis of the Swift-BAT burst
  95. GRB 060105: BAT refined analysis
  96. GRB 060105: XRT refined analysis
  97. GRB060105: Swift detection of a bright long burst
  98. GRB 060102: Swift-BAT refined analysis
  99. GRB 060102: Swift-BAT detection of a burst
  100. GRB 051221B: Optical Observations with Kuiper 1.54m

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