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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"

32686 results found.

  1. GRB 110205A: WSRT radio observation
  2. GRB 110206A: UVOT detection of afterglow candidate
  3. GRB110205A: CARMA 3mm Observations
  4. GRB 110207A: MASTER prompt and early optical observations
  5. Konus-Wind observation of GRB 110205A
  6. GRB 110206A: Swift detection of a probable X-ray afterglow
  7. GRB 110205A: Lightbuckets Optical Observations
  8. GRB 110205A : Lulin optical observation
  9. GRB110205A: SMA 1.3mm Observations
  10. GRB 110205A: Swift/UVOT Continuing Observations
  11. GRB 110205A: Lulin optical observations and temporal decay index
  12. GRB 110205A: Swift-BAT refined analysis
  13. GRB 110205A: Newcastle Observatory Optical Observations
  14. GRB 110205A: Swift-XRT refined Analysis
  15. GRB 110205A: LOAO B/R Observation
  16. GRB 101225A is likely at z~0
  17. GRB 110205A: optical flare confirmation
  18. GRB 110205A: NOT redshift confirmation
  19. GRB 110205A: FAST Redshift
  20. GRB 110205A: GRAS005 optical observations
  21. GRB 110205A: PAIRITEL NIR Afterglow Detection
  22. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  23. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  24. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  25. GRB 110128A: Fermi GBM detection
  26. GRB 110201A: Swift-XRT refined Analysis
  27. GRB110201A: MITSuME Okayama optical upper limits
  28. Swift/UVOT observations of GRB110201A
  29. GRB 110201A: Swift-BAT refined analysis
  30. GRB110112B: EVLA Observations
  31. GRB101224A: EVLA Observations
  32. GRB110112A: EVLA Observations
  33. GRB110128A: MITSuME Okayama optical upper limits
  34. GRB 101112A: Maidanak and CrAO optical observations
  35. GRB110128A: TNG NIR observations
  36. GRB 110128A, Swift-BAT refined analysis
  37. GRB 110128A: TAROT-Calern refined analysis
  38. GRB 110128A: Swift/UVOT observations
  39. GRB 110128A: Swift-XRT refined Analysis
  40. GRB 110120A: Suzaku WAM observation of the prompt emission
  41. GRB 110128A: WHT redshifts of nearby field galaxies
  42. GRB 110128A: VLT/X-shooter redshift
  43. GRB 110128A: Afterglow detection from NOT
  44. GRB 110128A: TAROT Calern observatory upper limits
  45. Konus-Wind observation of GRB 110120A
  46. GRB 110106B, radio observations
  47. GRB 110120A: MASTER optical observations
  48. GRB 110120A: Fermi LAT detection
  49. GRB 101224A, the review of the sky area in plate archives
  50. IPN triangulation of GRB 110120A
  51. GRB 101225A: CQUEAN optical observation
  52. GRB 110106A: CrAO optical observations
  53. GRB 110119A: Fermi GBM detection
  54. GRB 110119A: Suzaku WAM observation of the prompt emission
  55. GRB 110112A: optical upper limit
  56. GRB110119: Swift/UVOT Detection
  57. GRB 110119A: Swift-XRT refined Analysis
  58. GRB110119A: MITSuME Okayama optical upper limits
  59. GRB 110119A: Swift-BAT refined analysis
  60. GRB 110119A: PAIRITEL NIR Afterglow Detection
  61. GRB110106A, mm-radio observations
  62. GRB 101219B: tentative redshift and spectroscopic supernova detection
  63. GRB 101219B: GROND detection of a SN signature
  64. GRB 101219B: correction
  65. New feature in Fermi GBM GRB Ground Position Notices
  66. Swift-BAT Trigger 442539 is not a GRB
  67. GRB 110112B: Fermi GBM observation
  68. The Christmas burst GRB 101225A - optical spectroscopy with GTC
  69. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  70. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  71. GRB 110107A: Swift-XRT afterglow confirmation
  72. GRB 101225A: HST observations - no host detected
  73. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  74. GRB 110112A: Swift-XRT refined Analysis
  75. GRB 110112A: Swift/UVOT upper limits
  76. GRB 110112A: WHT candidate afterglow/host galaxy
  77. GRB 110112A: Swift-BAT refined analysis
  78. GRB 110106B: MASTER optical observations
  79. GRB110112A: TNT optical afterglow candidate
  80. GRB 110106B: early optical and near-IR observations
  81. GRB 110107A: Swift/UVOT upper limits
  82. GRB 101225a
  83. GRB 101219b. Possible radio afterglow detection.
  84. GRB 110106B: MASTER early optical observations
  85. GRB 110107A: Swift-BAT refined analysis
  86. GRB 101213A: Gemini-N galaxy redshift
  87. GRB 110106B: Fermi GBM detection
  88. Short GRB 110106A: MASTER OT observations
  89. GRB 110106B: Swift-XRT refined Analysis
  90. GRB 110106B: Gemini-North / WHT detection of a fading afterglow
  91. GRB 110106A: TNG NIR observations
  92. GRB 110106B Gemini-N galaxy redshift
  93. GRB 110106B: Liverpool Telescope observations
  94. GRB 110106A: ISAS-Kanazawa optical upper limit
  95. GRB 110106A: MITSuME Okayama optical upper limits
  96. GRB 110106B: WHT candidate afterglow
  97. GRB 110106B: Swift-BAT refined analysis
  98. GRB 110106A: Swift/UVOT Upper Limits
  99. GRB 110106A: TNG redshift of the closeby galaxy
  100. GRB 110106A: Swift-XRT refined Analysis

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