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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"

28281 results found.

  1. Swift/UVOT observations of GRB110223b
  2. GRB 110223A: Swift-BAT refined analysis
  3. GRB 110223A : early optical limit by "Pi of the Sky"
  4. GRB 110223A: Liverpool Telescope observations
  5. GRB 110223A: Swift-XRT refined Analysis
  6. GRB 110223B: Swift-XRT refined Analysis
  7. GRB 110223A: Enhanced Swift-XRT position
  8. GRB 110223B: Enhanced Swift-XRT position
  9. GRB 110223B: Swift-BAT refined analysis
  10. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  11. GRB 110223B: Swift detection of a burst
  12. GRB 110223A: Swift detection of a burst
  13. GRB 101225A, the review of the sky area in plate archives
  14. OT 110215: Further NIR observations from NOT of the GRB candidate
  15. GRB 110213B: Swift/UVOT observations
  16. Fermi GBM detection of an SGR-like burst
  17. Swift XRT and UVOT Observations of OT 110215
  18. OT 110215: NIR observations from NOT of GRB candidate
  19. GRB 110213A: optical observations in CrAO
  20. GRB 110213B: GROND observations of the optical/NIR afterglow
  21. OT 110215: possible GRB from 2MASS J00264184+8324093
  22. Swift/UVOT observations of GRB110210a.
  23. GRB 110210A: optical upper limit
  24. GRB 110210A: ROVOR Upper Limit
  25. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  26. GRB 110212A: Swift XRT and UVOT observations
  27. GRB 110205A: Konkoly optical observations
  28. GRB 110213B: Swift XRT observation
  29. GRB 110213A: MITSuME Akeno Optical Observation
  30. Konus-Wind observation of GRB 110213B
  31. GRB 110213A: Swift-XRT refined Analysis
  32. GRB110213A: MITSuME Okayama Optical Observation
  33. GRB 110213A: Swift/UVOT refined analysis
  34. GRB 110213A, Swift-BAT refined analysis
  35. GRB 110213A: optical observations
  36. GRB 110213A: Enhanced Swift-XRT position
  37. GRB110212A: MITSuME Okayama optical upper limits
  38. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  39. GRB 110213A: P60 Optical Afterglow Detection
  40. GRB 110213A: Swift detection of a burst with optical afterglow
  41. GRB 110212A: GRT Optical Observation
  42. GRB 110212A, Swift-BAT refined analysis
  43. GRB 110212A: SARA-N Optical Limits
  44. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  45. GRB 110205A: detection of optical linear polarization from CAHA
  46. GRB 110207A: Suzaku WAM observation of the prompt emission
  47. GRB 110210A: Swift-XRT refined Analysis
  48. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  49. GRB 110210A: Swift-BAT refined analysis
  50. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  51. GRB 110210A: Enhanced Swift-XRT position
  52. GRB 110201A: optical observations
  53. GRB 110210A: Swift detection of a burst
  54. Fermi GBM detection of a burst from 1E 1841-045
  55. Swift/UVOT observations of GRB110208a
  56. GRB 110205A: Suzaku WAM observation of the prompt emission
  57. GRB 110207A: Swift-XRT observations
  58. GRB 110208A: Swift-XRT refined Analysis
  59. GRB 110208A: Enhanced Swift-XRT position
  60. GRB 110208A: Swift-BAT refined analysis
  61. GRB 110208A: Swift detection of a burst
  62. GRB 110205A : HCT optical observations
  63. GRB 110206A: Decay of afterglow candidate
  64. GRB 110207A: TAROT Calern observatory optical observations
  65. GRB 110206A: GROND detection of afterglow candidate
  66. GRB 110207A: Swift-BAT refined analysis
  67. Konus-Wind observation of GRB 110205A
  68. GRB 110206A: Swift detection of a probable X-ray afterglow
  69. GRB 110206A: TAROT La Silla observatory optical observations
  70. GRB 110205A: Lightbuckets Optical Observations
  71. GRB 110206A: a long GRB detected by INTEGRAL
  72. GRB110205A: MITSuME Ishigakijima Optical Observation
  73. GRB110205A: MITSuME Okayama Optical Observation
  74. GRB 110205A: Swift/UVOT Continuing Observations
  75. Observations GRB 110205A
  76. GRB 110205A: Swift-BAT refined analysis
  77. GRB 110205A: Newcastle Observatory Optical Observations
  78. GRB 110205A: Swift-XRT refined Analysis
  79. GRB 110205A: LOAO B/R Observation
  80. GRB 110205A: optical flare confirmation
  81. GRB 110205A: NOT redshift confirmation
  82. GRB 110205A: Enhanced Swift-XRT position
  83. GRB 110205A: PAIRITEL NIR Afterglow Detection
  84. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  85. GRB 110205A: TAROT Calern observatory detection of an optical flare
  86. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  87. GRB 110205A: TAROT Calern observatory optical detection
  88. GRB 110205A: Swift detection of a burst with an optical candidate
  89. GRB 110128A: Fermi GBM detection
  90. GRB 110201A: Swift-XRT refined Analysis
  91. GRB110201A: MITSuME Okayama optical upper limits
  92. Swift/UVOT observations of GRB110201A
  93. GRB 110201A: Swift-BAT refined analysis
  94. GRB 110201A: Swift detection of a burst
  95. GRB110112B: EVLA Observations
  96. GRB110112A: EVLA Observations
  97. GRB110128A: MITSuME Okayama optical upper limits
  98. GRB 110125A: Fermi GBM detection
  99. GRB 101112A: Maidanak and CrAO optical observations
  100. GRB110128A: TNG NIR observations

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