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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"

42271 results found.

  1. Konus-Wind observation of GRB 110205A
  2. GRB 110207A: Swift detection of a burst
  3. GRB 110206A: Swift detection of a probable X-ray afterglow
  4. GRB 110206A: TAROT La Silla observatory optical observations
  5. GRB 110205A: Lightbuckets Optical Observations
  6. GRB 110206A: a long GRB detected by INTEGRAL
  7. GRB 110205A : Lulin optical observation
  8. GRB110205A: MITSuME Ishigakijima Optical Observation
  9. GRB110205A: MITSuME Okayama Optical Observation
  10. GRB110205A: SMA 1.3mm Observations
  11. GRB 110205A: Swift/UVOT Continuing Observations
  12. GRB 110205A: Lulin optical observations and temporal decay index
  13. Observations GRB 110205A
  14. GRB 110205A: Swift-BAT refined analysis
  15. GRB 110205A: Newcastle Observatory Optical Observations
  16. GRB 110205A: Swift-XRT refined Analysis
  17. GRB 101225A is likely at z~0
  18. GRB 110205A: optical flare confirmation
  19. GRB 110205A: NOT redshift confirmation
  20. GRB 110205A: Enhanced Swift-XRT position
  21. GRB 110205A: FAST Redshift
  22. GRB 110205A: GRAS005 optical observations
  23. GRB 110205A: PAIRITEL NIR Afterglow Detection
  24. GRB 110205A: Possible Lick/Kast redshift
  25. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  26. GRB 110205A: TAROT Calern observatory detection of an optical flare
  27. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  28. GRB 110205A: TAROT Calern observatory optical detection
  29. GRB 110205A: Swift detection of a burst with an optical candidate
  30. GRB 110128A: Fermi GBM detection
  31. GRB 110201A: Swift-XRT refined Analysis
  32. GRB110201A: MITSuME Okayama optical upper limits
  33. Swift/UVOT observations of GRB110201A
  34. GRB 110201A: Swift-BAT refined analysis
  35. GRB 110201A: MASTER optical observations
  36. GRB 110201A: Swift detection of a burst
  37. GRB110112B: EVLA Observations
  38. GRB101224A: EVLA Observations
  39. GRB110112A: EVLA Observations
  40. GRB110128A: MITSuME Okayama optical upper limits
  41. GRB 110125A: Fermi GBM detection
  42. GRB 101112A: Maidanak and CrAO optical observations
  43. GRB110128A: TNG NIR observations
  44. GRB 110128A, Swift-BAT refined analysis
  45. GRB 110128A: TAROT-Calern refined analysis
  46. GRB 110128A: Swift/UVOT observations
  47. GRB 110128A: Swift-XRT refined Analysis
  48. GRB 110120A: Suzaku WAM observation of the prompt emission
  49. GRB 110128A: VLT/X-shooter redshift
  50. GRB 110128A: Enhanced Swift-XRT position
  51. GRB 110128A: Afterglow detection from NOT
  52. GRB 110128A: TAROT Calern observatory upper limits
  53. GRB 110128A: Swift detection of a burst
  54. Konus-Wind observation of GRB 110120A
  55. GRB 110123A: Fermi GBM detection
  56. GRB 110106B, radio observations
  57. GRB 110120A: MASTER optical observations
  58. GRB 110120A: Fermi LAT detection
  59. GRB 101224A, the review of the sky area in plate archives
  60. IPN triangulation of GRB 110120A
  61. GRB 101225A: CQUEAN optical observation
  62. GRB 110106A: CrAO optical observations
  63. GRB 110119A: Fermi GBM detection
  64. GRB 110120A: Fermi GBM detection
  65. GRB 110119A: Suzaku WAM observation of the prompt emission
  66. GRB 110112A: optical upper limit
  67. GRB 110120A: MASTER optical observations
  68. GRB110119: Swift/UVOT Detection
  69. GRB 110119A: Swift-XRT refined Analysis
  70. GRB110119A: MITSuME Okayama optical upper limits
  71. GRB 110119A: Swift-BAT refined analysis
  72. GRB 110119A: PAIRITEL NIR Afterglow Detection
  73. GRB 110119A: Enhanced Swift-XRT position
  74. GRB 110119A: Swift detection of a burst with an optical detection
  75. GRB110106A, mm-radio observations
  76. GRB 101219B: tentative redshift and spectroscopic supernova detection
  77. GRB 101219B: GROND detection of a SN signature
  78. Swift-BAT trigger 442771 is a noise fluctuation
  79. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  80. New feature in Fermi GBM GRB Ground Position Notices
  81. Swift Trigger 442539 is probably not a GRB
  82. Short GRB 110112B : early optical limit by "Pi of the Sky"
  83. GRB 110112B: Fermi GBM observation
  84. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  85. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  86. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  87. GRB 110107A: Swift-XRT afterglow confirmation
  88. GRB 101225A: HST observations - no host detected
  89. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  90. GRB 110112B: A short GRB detected by INTEGRAL
  91. GRB 110112A: Swift-XRT refined Analysis
  92. GRB 110112A: Swift/UVOT upper limits
  93. GRB 110112A: WHT candidate afterglow/host galaxy
  94. GRB 110112A: MASTER optical observations
  95. GRB 110112A: Swift-BAT refined analysis
  96. GRB 110112A: Enhanced Swift-XRT position
  97. GRB 110106B: MASTER optical observations
  98. GRB110112A: TNT optical afterglow candidate
  99. GRB 110112A: Swift detection of a possible short burst
  100. GRB 110106B: early optical and near-IR observations

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