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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"

36309 results found.

  1. GRB 060211A: Further refined analysis of the Swift burst
  2. GRB060121: optical observations
  3. GRB060110: optical observations
  4. GRB060105: optical observations
  5. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  6. GRB 060211b: P60 Observations
  7. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  8. GRB 060206: SOAR Detections
  9. GRB 050826: Optical Afterglow and Host Galaxy
  10. GRB 060210: Further refined analysis of the Swift-BAT burst
  11. GRB 060211B: Swift/BAT refined analysis
  12. GRB060210: Swift/UVOT Upper Limits
  13. GRB 060211B: Swift-XRT Team refined analysis
  14. GRB060211b: optical observation
  15. GRB 060210: Optical Observations
  16. GRB060211.7: MASTER_optical_observation under the snow
  17. GRB 060211A: Swift XRT Team Refined Analysis
  18. GRB 060211B: Swift-BAT detection of a burst
  19. GRB060211: Faulkes North observation
  20. GRB 060211: ROTSE-III Optical Limits
  21. GRB 060211: Swift detection of a long burst
  22. GRB 060210: Refined analysis of the Swift-BAT burst
  23. GRB060210: Swift XRT Refined Analysis
  24. GRB060206, optical observations
  25. GRB 060210 : Xinglong and Lulin optical limit
  26. GRB060210: Gemini absorption spectroscopy
  27. GRB 060210: optical evolution
  28. GRB060210:Faulkes Telescope North Afterglow Confirmation
  29. GRB 060210: candidate afterglow
  30. GRB 060210: Swift detection of a burst
  31. GRB 060206: Swift/UVOT Observations
  32. Swift-BAT trigger 180931 is not a GRB
  33. GRB060209: RTT150 optical observations
  34. GRB 060209 : TAROT optical observation
  35. GRB060209A: MASTER optical observation
  36. GRB 060209(?): Swift-BAT detection of a possible burst
  37. GRB 060206: near-infrared observations (JK' imaging)
  38. GRB 060206: WSRT Radio Observations
  39. GRB 060203: Swift/UVOT upper limits
  40. GRB 060206: TTT Observations
  41. GRB 060206: More PROMPT Detections
  42. GRB 060121 : WIDGET Pre-trigger limit
  43. GRB 060206: Tenagra II Observations
  44. GRB 060206: PROMPT Detections
  45. Retraction of orphan GRB afterglow candidate
  46. GRB060204a: Swift XRT Source is not GRB Afterglow
  47. GRB 060206: optical observations at Asiago
  48. Orphan GRB Afterglow candidate
  49. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  50. GRB 060206: Subaru/FOCAS optical spectroscopy
  51. GRB 060206: IR Detection of the Afterglow
  52. GRB 060206: Lick 3m Spectroscopy
  53. GRB 060204A: ROSAT Pointing
  54. GRB 060206: Super-LOTIS observations
  55. GRB060204A: Swift/UVOT observations
  56. GRB 060206: Swift-BAT refined analysis
  57. GRB 060206 : Lulin optical observations
  58. GRB060206: SDSS Pre-Burst Observations
  59. GRB060206: Swift XRT Refined Analysis
  60. GRB060206: Liverpool Telescope observation
  61. GRB 060206: Spectroscopic Redshift
  62. GRB060206: P60 Optical Observations
  63. GRB 060206: KAIT observations
  64. GRB060206: Swift XRT Position
  65. GRB060206: SARA Detection
  66. GRB 060206: RAPTOR observations of afterglow candidate variability.
  67. GRB 060206: High redshift burst
  68. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  69. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  70. BAT GRB 060204C is probably not a GRB
  71. GRB060204C: optical observation
  72. GRB 060204B: BVRi-band detections of optical afterglow
  73. GRB 060204A: Swift XRT upper limit
  74. GRB 060204A: FRAM optical observations
  75. GRB060204B: Swift/UVOT refined analysis
  76. GRB 060204C: optical observations
  77. Swift XRT Observation of GRB 060204C
  78. GRB 060204B: Swift-BAT refined analysis
  79. GRB 060204B: ART early limit
  80. GRB060204B: Swift XRT Team Refined Analysis
  81. GRB 060204C: OSN limits
  82. GRB 060204b: Keck/LRIS Afterglow Confirmation
  83. GRB 060204C: BOOTES-IR optical limits
  84. GRB 060204C: Liverpool Telescopes optical limit
  85. GRB 060204C: ROTSE-III Optical Limits
  86. GRB 060204C: Swift-BAT detection of a burst
  87. GRB 060124: Radio Observations
  88. GRB060204B: Faulkes OT candidate
  89. GRB 060204B: ART optical limit
  90. GRB 060204A: further INTEGRAL results
  91. GRB060204B - SDSS pre-burst observations
  92. GRB 060203: Swift-BAT refined analysis
  93. GRB 060204B: Swift detection of a burst
  94. GRB 060204: a long GRB detected by INTEGRAL
  95. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  96. GRB 060203: RTT150 optical observations
  97. GRB060203: Swift XRT Team Refined Analysis
  98. Swift-BAT trigger is GRB 060203
  99. GRB 060203: IR Counterpart
  100. GRB060203: Observations with SARA

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