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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"

36400 results found.

  1. GRB 060210: Further refined analysis of the Swift-BAT burst
  2. GRB 060211B: Swift/BAT refined analysis
  3. GRB060210: Swift/UVOT Upper Limits
  4. GRB 060211B: Swift-XRT Team refined analysis
  5. GRB060211b: optical observation
  6. GRB 060210: Optical Observations
  7. GRB060211.7: MASTER_optical_observation under the snow
  8. GRB 060211A: Swift XRT Team Refined Analysis
  9. GRB 060211B: Swift-BAT detection of a burst
  10. GRB060211: Faulkes North observation
  11. GRB 060211: ROTSE-III Optical Limits
  12. GRB 060211: Swift detection of a long burst
  13. GRB 060210: Refined analysis of the Swift-BAT burst
  14. GRB060210: Swift XRT Refined Analysis
  15. GRB060206, optical observations
  16. GRB 060210 : Xinglong and Lulin optical limit
  17. GRB060210: Gemini absorption spectroscopy
  18. GRB 060210: optical evolution
  19. GRB060210:Faulkes Telescope North Afterglow Confirmation
  20. GRB 060210: candidate afterglow
  21. GRB 060210: Swift detection of a burst
  22. GRB 060206: Swift/UVOT Observations
  23. Swift-BAT trigger 180931 is not a GRB
  24. GRB060209: RTT150 optical observations
  25. GRB 060209 : TAROT optical observation
  26. GRB060209A: MASTER optical observation
  27. GRB 060209(?): Swift-BAT detection of a possible burst
  28. GRB 060206: near-infrared observations (JK' imaging)
  29. GRB 060206: WSRT Radio Observations
  30. GRB 060203: Swift/UVOT upper limits
  31. GRB 060206: TTT Observations
  32. GRB 060206: More PROMPT Detections
  33. GRB 060121 : WIDGET Pre-trigger limit
  34. GRB 060206: Tenagra II Observations
  35. GRB 060206: PROMPT Detections
  36. Retraction of orphan GRB afterglow candidate
  37. GRB060204a: Swift XRT Source is not GRB Afterglow
  38. GRB 060206: optical observations at Asiago
  39. Orphan GRB Afterglow candidate
  40. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  41. GRB 060206: Subaru/FOCAS optical spectroscopy
  42. GRB 060206: IR Detection of the Afterglow
  43. GRB 060206: Lick 3m Spectroscopy
  44. GRB 060204A: ROSAT Pointing
  45. GRB 060206: Super-LOTIS observations
  46. GRB060204A: Swift/UVOT observations
  47. GRB 060206: Swift-BAT refined analysis
  48. GRB 060206 : Lulin optical observations
  49. GRB060206: SDSS Pre-Burst Observations
  50. GRB060206: Swift XRT Refined Analysis
  51. GRB060206: Liverpool Telescope observation
  52. GRB 060206: Spectroscopic Redshift
  53. GRB060206: P60 Optical Observations
  54. GRB 060206: KAIT observations
  55. GRB060206: Swift XRT Position
  56. GRB060206: SARA Detection
  57. GRB 060206: RAPTOR observations of afterglow candidate variability.
  58. GRB 060206: High redshift burst
  59. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  60. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  61. BAT GRB 060204C is probably not a GRB
  62. GRB060204C: optical observation
  63. GRB 060204B: BVRi-band detections of optical afterglow
  64. GRB 060204A: Swift XRT upper limit
  65. GRB 060204A: FRAM optical observations
  66. GRB060204B: Swift/UVOT refined analysis
  67. GRB 060204C: optical observations
  68. Swift XRT Observation of GRB 060204C
  69. GRB 060204B: Swift-BAT refined analysis
  70. GRB 060204B: ART early limit
  71. GRB060204B: Swift XRT Team Refined Analysis
  72. GRB 060204C: OSN limits
  73. GRB 060204b: Keck/LRIS Afterglow Confirmation
  74. GRB 060204C: BOOTES-IR optical limits
  75. GRB 060204C: Liverpool Telescopes optical limit
  76. GRB 060204C: ROTSE-III Optical Limits
  77. GRB 060204C: Swift-BAT detection of a burst
  78. GRB 060124: Radio Observations
  79. GRB060204B: Faulkes OT candidate
  80. GRB 060204B: ART optical limit
  81. GRB 060204A: further INTEGRAL results
  82. GRB060204B - SDSS pre-burst observations
  83. GRB 060203: Swift-BAT refined analysis
  84. GRB 060204B: Swift detection of a burst
  85. GRB 060204: a long GRB detected by INTEGRAL
  86. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  87. GRB 060203: RTT150 optical observations
  88. GRB060203: Swift XRT Team Refined Analysis
  89. Swift-BAT trigger is GRB 060203
  90. GRB 060203: IR Counterpart
  91. GRB060203: Observations with SARA
  92. GRB 060203: P60 Confirmation of Optical Afterglow
  93. Possible GRB 060203: candidate optical counterpart
  94. Possible GRB 060203: optical observations at Asiago
  95. GRB 060202: PROMPT Observations
  96. GRB 060202: GETS observation
  97. GRB 060202: Gemini-N J, H, K_s observations
  98. GRB 060202 : Kiso B and R band limit
  99. GRB 060202: Near-IR Observation with UKIRT/WFCAM
  100. GRB 060202: Optical Afterglow Candidate from Keck/LRIS

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