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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"

28124 results found.

  1. GRB 110319B: Swift-XRT afterglow candidate.
  2. GRB 110319B found in ground analysis of Swift-BAT data
  3. GRB 110319A: Swift/UVOT Detection
  4. GRB 110319A: Swift-BAT refined analysis
  5. GRB 110319A: Swift-XRT refined Analysis
  6. GRB 110318B: GROND upper limits
  7. GRB 110319A: Enhanced Swift-XRT position
  8. GRB 110319A: Swift detection of a burst
  9. GRB 110318B: Swift-XRT refined Analysis
  10. GRB 110318A: Fermi GBM detection
  11. GRB 110318B: Swift-BAT refined analysis
  12. GRB 110318B: Enhanced Swift-XRT position
  13. GRB 110318A: Swift-BAT refined analysis
  14. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  15. GRB 110318B: Swift detection of a burst
  16. GRB 110315A: RTT150 optical observations
  17. GRB 110315A: Swift/UVOT Upper Limits
  18. GRB 110315A: Swift-XRT refined Analysis
  19. GRB 110315A: Swift-BAT refined analysis
  20. GRB 110315A: Enhanced Swift-XRT position
  21. GRB 110315A: MASTER early optical observations
  22. GRB 110315A: Swift detection of a burst
  23. GRB110312A: MITSuME Okayama Optical upper limits
  24. GRB 110312A: RTT150 optical observations
  25. GRB 110312A: Swift/UVOT Upper Limits
  26. GRB 110312A: Swift-XRT refined Analysis
  27. GRB 110312A: GROND Upper Limits
  28. GRB 110312A: Enhanced Swift-XRT position
  29. GRB 110312A: Swift-BAT refined analysis
  30. GRB 110312A: Swift detection of a burst
  31. GRB 110305A: REM detection of a possible NIR afterglow
  32. GRB110305A: MITSuME Ishigakijima Optical upper limits
  33. GRB 110305A: Swift/UVOT Upper Limits
  34. GRB 110305A: Swift-XRT refined Analysis
  35. GRB 110305A: Enhanced Swift-XRT position
  36. GRB 110305A: Swift-BAT refined analysis
  37. GRB 110305A: GROND Detection of Optical Afterglow
  38. GRB 110305A: Swift detection of a burst
  39. GRB 110223A: optical upper limits
  40. GRB 110301A: Fermi GBM detection
  41. Swift/UVOT observations of GRB110223A
  42. No IPN GRB detected in conjunction with candidate GRB 110215
  43. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  44. Swift/UVOT observations of GRB110223b
  45. GRB 110223A: Swift-BAT refined analysis
  46. GRB 110223A : early optical limit by "Pi of the Sky"
  47. GRB 110223A: Liverpool Telescope observations
  48. GRB 110223A: Swift-XRT refined Analysis
  49. GRB 110223B: Swift-XRT refined Analysis
  50. GRB 110223A: Enhanced Swift-XRT position
  51. GRB 110223B: Enhanced Swift-XRT position
  52. GRB 110223B: Swift-BAT refined analysis
  53. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  54. GRB 110223B: Swift detection of a burst
  55. GRB 110223A: Swift detection of a burst
  56. GRB 101225A, the review of the sky area in plate archives
  57. OT 110215: Further NIR observations from NOT of the GRB candidate
  58. GRB 110213B: Swift/UVOT observations
  59. Fermi GBM detection of an SGR-like burst
  60. Swift XRT and UVOT Observations of OT 110215
  61. OT 110215: NIR observations from NOT of GRB candidate
  62. GRB 110213A: optical observations in CrAO
  63. GRB 110213B: GROND observations of the optical/NIR afterglow
  64. OT 110215: possible GRB from 2MASS J00264184+8324093
  65. Swift/UVOT observations of GRB110210a.
  66. GRB 110210A: optical upper limit
  67. GRB 110210A: ROVOR Upper Limit
  68. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  69. GRB 110212A: Swift XRT and UVOT observations
  70. GRB 110205A: Konkoly optical observations
  71. GRB 110213B: Swift XRT observation
  72. GRB 110213A: MITSuME Akeno Optical Observation
  73. Konus-Wind observation of GRB 110213B
  74. GRB 110213A: Swift-XRT refined Analysis
  75. GRB110213A: MITSuME Okayama Optical Observation
  76. GRB 110213A: Swift/UVOT refined analysis
  77. GRB 110213A, Swift-BAT refined analysis
  78. GRB 110213A: optical observations
  79. GRB 110213A: Enhanced Swift-XRT position
  80. GRB110212A: MITSuME Okayama optical upper limits
  81. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  82. GRB 110213A: P60 Optical Afterglow Detection
  83. GRB 110213A: Swift detection of a burst with optical afterglow
  84. GRB 110212A: GRT Optical Observation
  85. GRB 110212A, Swift-BAT refined analysis
  86. GRB 110212A: SARA-N Optical Limits
  87. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  88. GRB 110205A: detection of optical linear polarization from CAHA
  89. GRB 110207A: Suzaku WAM observation of the prompt emission
  90. GRB 110210A: Swift-XRT refined Analysis
  91. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  92. GRB 110210A: Swift-BAT refined analysis
  93. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  94. GRB 110210A: Enhanced Swift-XRT position
  95. GRB 110201A: optical observations
  96. GRB 110210A: Swift detection of a burst
  97. Fermi GBM detection of a burst from 1E 1841-045
  98. Swift/UVOT observations of GRB110208a
  99. GRB 110205A: Suzaku WAM observation of the prompt emission
  100. GRB 110207A: Swift-XRT observations

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