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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"

28280 results found.

  1. GRB 110223A: Swift-BAT refined analysis
  2. GRB 110223A : early optical limit by "Pi of the Sky"
  3. GRB 110223A: Liverpool Telescope observations
  4. GRB 110223A: Swift-XRT refined Analysis
  5. GRB 110223B: Swift-XRT refined Analysis
  6. GRB 110223A: Enhanced Swift-XRT position
  7. GRB 110223B: Enhanced Swift-XRT position
  8. GRB 110223B: Swift-BAT refined analysis
  9. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  10. GRB 110223B: Swift detection of a burst
  11. GRB 110223A: Swift detection of a burst
  12. GRB 101225A, the review of the sky area in plate archives
  13. OT 110215: Further NIR observations from NOT of the GRB candidate
  14. GRB 110213B: Swift/UVOT observations
  15. Fermi GBM detection of an SGR-like burst
  16. Swift XRT and UVOT Observations of OT 110215
  17. OT 110215: NIR observations from NOT of GRB candidate
  18. GRB 110213A: optical observations in CrAO
  19. GRB 110213B: GROND observations of the optical/NIR afterglow
  20. OT 110215: possible GRB from 2MASS J00264184+8324093
  21. Swift/UVOT observations of GRB110210a.
  22. GRB 110210A: optical upper limit
  23. GRB 110210A: ROVOR Upper Limit
  24. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  25. GRB 110212A: Swift XRT and UVOT observations
  26. GRB 110205A: Konkoly optical observations
  27. GRB 110213B: Swift XRT observation
  28. GRB 110213A: MITSuME Akeno Optical Observation
  29. Konus-Wind observation of GRB 110213B
  30. GRB 110213A: Swift-XRT refined Analysis
  31. GRB110213A: MITSuME Okayama Optical Observation
  32. GRB 110213A: Swift/UVOT refined analysis
  33. GRB 110213A, Swift-BAT refined analysis
  34. GRB 110213A: optical observations
  35. GRB 110213A: Enhanced Swift-XRT position
  36. GRB110212A: MITSuME Okayama optical upper limits
  37. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  38. GRB 110213A: P60 Optical Afterglow Detection
  39. GRB 110213A: Swift detection of a burst with optical afterglow
  40. GRB 110212A: GRT Optical Observation
  41. GRB 110212A, Swift-BAT refined analysis
  42. GRB 110212A: SARA-N Optical Limits
  43. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  44. GRB 110205A: detection of optical linear polarization from CAHA
  45. GRB 110207A: Suzaku WAM observation of the prompt emission
  46. GRB 110210A: Swift-XRT refined Analysis
  47. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  48. GRB 110210A: Swift-BAT refined analysis
  49. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  50. GRB 110210A: Enhanced Swift-XRT position
  51. GRB 110201A: optical observations
  52. GRB 110210A: Swift detection of a burst
  53. Fermi GBM detection of a burst from 1E 1841-045
  54. Swift/UVOT observations of GRB110208a
  55. GRB 110205A: Suzaku WAM observation of the prompt emission
  56. GRB 110207A: Swift-XRT observations
  57. GRB 110208A: Swift-XRT refined Analysis
  58. GRB 110208A: Enhanced Swift-XRT position
  59. GRB 110208A: Swift-BAT refined analysis
  60. GRB 110208A: Swift detection of a burst
  61. GRB 110205A : HCT optical observations
  62. GRB 110206A: Decay of afterglow candidate
  63. GRB 110207A: TAROT Calern observatory optical observations
  64. GRB 110206A: GROND detection of afterglow candidate
  65. GRB 110207A: Swift-BAT refined analysis
  66. Konus-Wind observation of GRB 110205A
  67. GRB 110206A: Swift detection of a probable X-ray afterglow
  68. GRB 110206A: TAROT La Silla observatory optical observations
  69. GRB 110205A: Lightbuckets Optical Observations
  70. GRB 110206A: a long GRB detected by INTEGRAL
  71. GRB110205A: MITSuME Ishigakijima Optical Observation
  72. GRB110205A: MITSuME Okayama Optical Observation
  73. GRB 110205A: Swift/UVOT Continuing Observations
  74. Observations GRB 110205A
  75. GRB 110205A: Swift-BAT refined analysis
  76. GRB 110205A: Newcastle Observatory Optical Observations
  77. GRB 110205A: Swift-XRT refined Analysis
  78. GRB 110205A: LOAO B/R Observation
  79. GRB 110205A: optical flare confirmation
  80. GRB 110205A: NOT redshift confirmation
  81. GRB 110205A: Enhanced Swift-XRT position
  82. GRB 110205A: PAIRITEL NIR Afterglow Detection
  83. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  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: Swift detection of a burst
  94. GRB110112B: EVLA Observations
  95. GRB110112A: EVLA Observations
  96. GRB110128A: MITSuME Okayama optical upper limits
  97. GRB 110125A: Fermi GBM detection
  98. GRB 101112A: Maidanak and CrAO optical observations
  99. GRB110128A: TNG NIR observations
  100. GRB 110128A, Swift-BAT refined analysis

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