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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"

37682 results found.

  1. GRB110213A: MITSuME Okayama Optical Observation
  2. GRB 110213A: Swift/UVOT refined analysis
  3. GRB 110213A: THO optical observations
  4. GRB 110213B: MAXI/GSC detection of a probable GRB
  5. GRB 110213A: Lightbuckets Optical Observations
  6. GRB 110213A, Swift-BAT refined analysis
  7. GRB 110213A: optical observations
  8. GRB 110213A: Enhanced Swift-XRT position
  9. GRB110212A: MITSuME Okayama optical upper limits
  10. GRB 110213A: KAIT observations
  11. GRB 110213A: GRAS011 optical observations
  12. GRB 110213A: Bok Telescope Redshift
  13. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  14. GRB 110213A: P60 Optical Afterglow Detection
  15. GRB 110213A: Swift detection of a burst with optical afterglow
  16. GRB 110212A: GRT Optical Observation
  17. GRB 110212A, Swift-BAT refined analysis
  18. GRB 110212A: SARA-N Optical Limits
  19. GRB110212A: BOOTES-2/TELMA optical limits
  20. GRB 110212A: ROTSE-III Optical Limits
  21. GRB 110212A: Swift detection of a burst
  22. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  23. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  24. GRB 110205A: detection of optical linear polarization from CAHA
  25. GRB 110207A: Suzaku WAM observation of the prompt emission
  26. GRB 110210A: optical upper limit
  27. GRB 110210A: Swift-XRT refined Analysis
  28. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  29. GRB 110210A: Swift-BAT refined analysis
  30. GRB 110210A: Enhanced Swift-XRT position
  31. GRB 110201A: optical observations
  32. GRB 110210A: Swift detection of a burst
  33. GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
  34. GRB 110208A: Magellan confirmation of the optical afterglow
  35. Fermi GBM detection of a burst from 1E 1841-045
  36. Swift/UVOT observations of GRB110208a
  37. GRB 110205A: Suzaku WAM observation of the prompt emission
  38. GRB 110208A: Potential afterglow from Magellan
  39. GRB 110207A: Swift-XRT observations
  40. GRB 110208A: Swift-XRT refined Analysis
  41. GRB 110208A: Enhanced Swift-XRT position
  42. GRB 110208A: Swift-BAT refined analysis
  43. GRB 110208A: Magellan optical observations
  44. GRB 110206A: SMARTS optical/IR afterglow decay
  45. GRB 110208A: Swift detection of a burst
  46. GRB 110205A: optical observations in Mondy observatory
  47. GRB 110207A: Fermi GBM observation
  48. GRB 110205A : HCT optical observations
  49. GRB 110206A: Decay of afterglow candidate
  50. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  51. GRB 110207A: TAROT Calern observatory optical observations
  52. GRB 110205A - Continued PAIRITEL NIR Observations
  53. GRB 110206A: GROND detection of afterglow candidate
  54. GRB 110207A: Swift-BAT refined analysis
  55. GRB 110205A: WSRT radio observation
  56. GRB 110206A: UVOT detection of afterglow candidate
  57. GRB 110207A: MASTER prompt and early optical observations
  58. Konus-Wind observation of GRB 110205A
  59. GRB 110207A: Swift detection of a burst
  60. GRB 110206A: Swift detection of a probable X-ray afterglow
  61. GRB 110206A: TAROT La Silla observatory optical observations
  62. GRB 110205A: Lightbuckets Optical Observations
  63. GRB 110206A: a long GRB detected by INTEGRAL
  64. GRB 110205A : Lulin optical observation
  65. GRB110205A: MITSuME Ishigakijima Optical Observation
  66. GRB110205A: MITSuME Okayama Optical Observation
  67. GRB 110205A: Swift/UVOT Continuing Observations
  68. GRB 110205A: Lulin optical observations and temporal decay index
  69. Observations GRB 110205A
  70. GRB 110205A: Swift-BAT refined analysis
  71. GRB 110205A: Newcastle Observatory Optical Observations
  72. GRB 110205A: Swift-XRT refined Analysis
  73. GRB 110205A: LOAO B/R Observation
  74. GRB 101225A is likely at z~0
  75. GRB 110205A: optical flare confirmation
  76. GRB 110205A: NOT redshift confirmation
  77. GRB 110205A: Enhanced Swift-XRT position
  78. GRB 110205A: FAST Redshift
  79. GRB 110205A: GRAS005 optical observations
  80. GRB 110205A: PAIRITEL NIR Afterglow Detection
  81. GRB 110205A: Possible Lick/Kast redshift
  82. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  83. GRB 110205A: Liverpool Telescope Afterglow Confirmation
  84. GRB 110205A: TAROT Calern observatory detection of an optical flare
  85. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  86. GRB 110205A: TAROT Calern observatory optical detection
  87. GRB 110205A: Swift detection of a burst with an optical candidate
  88. GRB 110128A: Fermi GBM detection
  89. GRB 110201A: Swift-XRT refined Analysis
  90. GRB110201A: MITSuME Okayama optical upper limits
  91. Swift/UVOT observations of GRB110201A
  92. GRB 110201A: Swift-BAT refined analysis
  93. GRB 110201A: MASTER optical observations
  94. GRB 110201A: Swift detection of a burst
  95. GRB110112B: EVLA Observations
  96. GRB101224A: EVLA Observations
  97. GRB110112A: EVLA Observations
  98. GRB110128A: MITSuME Okayama optical upper limits
  99. GRB 110125A: Fermi GBM detection
  100. GRB 101112A: Maidanak and CrAO optical observations

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