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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"

36105 results found.

  1. GRB060211B: REM optical and NIR observations
  2. GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec
  3. GRB 060211A: Further refined analysis of the Swift burst
  4. GRB060121: optical observations
  5. GRB060110: optical observations
  6. GRB060105: optical observations
  7. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  8. GRB 060211b: P60 Observations
  9. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  10. GRB 060206: SOAR Detections
  11. GRB 050826: Optical Afterglow and Host Galaxy
  12. GRB 060210: Further refined analysis of the Swift-BAT burst
  13. GRB 060211B: Swift/BAT refined analysis
  14. GRB060210: Swift/UVOT Upper Limits
  15. GRB 060211B: Swift-XRT Team refined analysis
  16. GRB060211b: optical observation
  17. GRB 060210: Optical Observations
  18. GRB060211.7: MASTER_optical_observation under the snow
  19. GRB 060211A: Swift XRT Team Refined Analysis
  20. GRB 060211B: Swift-BAT detection of a burst
  21. GRB060211: Faulkes North observation
  22. GRB 060211: ROTSE-III Optical Limits
  23. GRB 060211: Swift detection of a long burst
  24. GRB 060210: Refined analysis of the Swift-BAT burst
  25. GRB060210: Swift XRT Refined Analysis
  26. GRB060206, optical observations
  27. GRB 060210 : Xinglong and Lulin optical limit
  28. GRB060210: Gemini absorption spectroscopy
  29. GRB 060210: optical evolution
  30. GRB060210:Faulkes Telescope North Afterglow Confirmation
  31. GRB 060210: candidate afterglow
  32. GRB 060210: Swift detection of a burst
  33. GRB 060206: Swift/UVOT Observations
  34. Swift-BAT trigger 180931 is not a GRB
  35. GRB060209: RTT150 optical observations
  36. GRB 060209 : TAROT optical observation
  37. GRB060209A: MASTER optical observation
  38. GRB 060209(?): Swift-BAT detection of a possible burst
  39. GRB 060206: near-infrared observations (JK' imaging)
  40. GRB 060206: WSRT Radio Observations
  41. GRB 060203: Swift/UVOT upper limits
  42. GRB 060206: TTT Observations
  43. GRB 060206: More PROMPT Detections
  44. GRB 060121 : WIDGET Pre-trigger limit
  45. GRB 060206: Tenagra II Observations
  46. GRB 060206: PROMPT Detections
  47. Retraction of orphan GRB afterglow candidate
  48. GRB060204a: Swift XRT Source is not GRB Afterglow
  49. GRB 060206: optical observations at Asiago
  50. Orphan GRB Afterglow candidate
  51. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  52. GRB 060206: Subaru/FOCAS optical spectroscopy
  53. GRB 060206: IR Detection of the Afterglow
  54. GRB 060206: Lick 3m Spectroscopy
  55. GRB 060204A: ROSAT Pointing
  56. GRB 060206: Super-LOTIS observations
  57. GRB060204A: Swift/UVOT observations
  58. GRB 060206: Swift-BAT refined analysis
  59. GRB 060206 : Lulin optical observations
  60. GRB060206: SDSS Pre-Burst Observations
  61. GRB060206: Swift XRT Refined Analysis
  62. GRB060206: Liverpool Telescope observation
  63. GRB 060206: Spectroscopic Redshift
  64. GRB060206: P60 Optical Observations
  65. GRB 060206: KAIT observations
  66. GRB060206: Swift XRT Position
  67. GRB060206: SARA Detection
  68. GRB 060206: RAPTOR observations of afterglow candidate variability.
  69. GRB 060206: High redshift burst
  70. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  71. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  72. BAT GRB 060204C is probably not a GRB
  73. GRB060204C: optical observation
  74. GRB 060204B: BVRi-band detections of optical afterglow
  75. GRB 060204A: Swift XRT upper limit
  76. GRB 060204A: FRAM optical observations
  77. GRB060204B: Swift/UVOT refined analysis
  78. GRB 060204C: optical observations
  79. Swift XRT Observation of GRB 060204C
  80. GRB 060204B: Swift-BAT refined analysis
  81. GRB 060204B: ART early limit
  82. GRB060204B: Swift XRT Team Refined Analysis
  83. GRB 060204C: OSN limits
  84. GRB 060204b: Keck/LRIS Afterglow Confirmation
  85. GRB 060204C: BOOTES-IR optical limits
  86. GRB 060204C: Liverpool Telescopes optical limit
  87. GRB 060204C: ROTSE-III Optical Limits
  88. GRB 060204C: Swift-BAT detection of a burst
  89. GRB 060124: Radio Observations
  90. GRB060204B: Faulkes OT candidate
  91. GRB 060204B: ART optical limit
  92. GRB 060204A: further INTEGRAL results
  93. GRB060204B - SDSS pre-burst observations
  94. GRB 060203: Swift-BAT refined analysis
  95. GRB 060204B: Swift detection of a burst
  96. GRB 060204: a long GRB detected by INTEGRAL
  97. GRB 060202: UKIRT/WFCAM K-band and KeckI/LRIS I-band Observation
  98. GRB 060203: RTT150 optical observations
  99. GRB060203: Swift XRT Team Refined Analysis
  100. Swift-BAT trigger is GRB 060203

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