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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"

28270 results found.

  1. GRB 110223A: Swift detection of a burst
  2. GRB 101225A, the review of the sky area in plate archives
  3. OT 110215: Further NIR observations from NOT of the GRB candidate
  4. GRB 110213B: Swift/UVOT observations
  5. Fermi GBM detection of an SGR-like burst
  6. Swift XRT and UVOT Observations of OT 110215
  7. OT 110215: NIR observations from NOT of GRB candidate
  8. GRB 110213A: optical observations in CrAO
  9. GRB 110213B: GROND observations of the optical/NIR afterglow
  10. OT 110215: possible GRB from 2MASS J00264184+8324093
  11. Swift/UVOT observations of GRB110210a.
  12. GRB 110210A: optical upper limit
  13. GRB 110210A: ROVOR Upper Limit
  14. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  15. GRB 110212A: Swift XRT and UVOT observations
  16. GRB 110205A: Konkoly optical observations
  17. GRB 110213B: Swift XRT observation
  18. GRB 110213A: MITSuME Akeno Optical Observation
  19. Konus-Wind observation of GRB 110213B
  20. GRB 110213A: Swift-XRT refined Analysis
  21. GRB110213A: MITSuME Okayama Optical Observation
  22. GRB 110213A: Swift/UVOT refined analysis
  23. GRB 110213A, Swift-BAT refined analysis
  24. GRB 110213A: optical observations
  25. GRB 110213A: Enhanced Swift-XRT position
  26. GRB110212A: MITSuME Okayama optical upper limits
  27. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  28. GRB 110213A: P60 Optical Afterglow Detection
  29. GRB 110213A: Swift detection of a burst with optical afterglow
  30. GRB 110212A: GRT Optical Observation
  31. GRB 110212A, Swift-BAT refined analysis
  32. GRB 110212A: SARA-N Optical Limits
  33. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  34. GRB 110205A: detection of optical linear polarization from CAHA
  35. GRB 110207A: Suzaku WAM observation of the prompt emission
  36. GRB 110210A: Swift-XRT refined Analysis
  37. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  38. GRB 110210A: Swift-BAT refined analysis
  39. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  40. GRB 110210A: Enhanced Swift-XRT position
  41. GRB 110201A: optical observations
  42. GRB 110210A: Swift detection of a burst
  43. Fermi GBM detection of a burst from 1E 1841-045
  44. Swift/UVOT observations of GRB110208a
  45. GRB 110205A: Suzaku WAM observation of the prompt emission
  46. GRB 110207A: Swift-XRT observations
  47. GRB 110208A: Swift-XRT refined Analysis
  48. GRB 110208A: Enhanced Swift-XRT position
  49. GRB 110208A: Swift-BAT refined analysis
  50. GRB 110208A: Swift detection of a burst
  51. GRB 110205A : HCT optical observations
  52. GRB 110206A: Decay of afterglow candidate
  53. GRB 110207A: TAROT Calern observatory optical observations
  54. GRB 110206A: GROND detection of afterglow candidate
  55. GRB 110207A: Swift-BAT refined analysis
  56. Konus-Wind observation of GRB 110205A
  57. GRB 110206A: Swift detection of a probable X-ray afterglow
  58. GRB 110206A: TAROT La Silla observatory optical observations
  59. GRB 110205A: Lightbuckets Optical Observations
  60. GRB 110206A: a long GRB detected by INTEGRAL
  61. GRB110205A: MITSuME Ishigakijima Optical Observation
  62. GRB110205A: MITSuME Okayama Optical Observation
  63. GRB 110205A: Swift/UVOT Continuing Observations
  64. Observations GRB 110205A
  65. GRB 110205A: Swift-BAT refined analysis
  66. GRB 110205A: Newcastle Observatory Optical Observations
  67. GRB 110205A: Swift-XRT refined Analysis
  68. GRB 110205A: LOAO B/R Observation
  69. GRB 110205A: optical flare confirmation
  70. GRB 110205A: NOT redshift confirmation
  71. GRB 110205A: Enhanced Swift-XRT position
  72. GRB 110205A: PAIRITEL NIR Afterglow Detection
  73. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  74. GRB 110205A: TAROT Calern observatory detection of an optical flare
  75. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  76. GRB 110205A: TAROT Calern observatory optical detection
  77. GRB 110205A: Swift detection of a burst with an optical candidate
  78. GRB 110128A: Fermi GBM detection
  79. GRB 110201A: Swift-XRT refined Analysis
  80. GRB110201A: MITSuME Okayama optical upper limits
  81. Swift/UVOT observations of GRB110201A
  82. GRB 110201A: Swift-BAT refined analysis
  83. GRB 110201A: Swift detection of a burst
  84. GRB110112B: EVLA Observations
  85. GRB110112A: EVLA Observations
  86. GRB110128A: MITSuME Okayama optical upper limits
  87. GRB 110125A: Fermi GBM detection
  88. GRB 101112A: Maidanak and CrAO optical observations
  89. GRB110128A: TNG NIR observations
  90. GRB 110128A, Swift-BAT refined analysis
  91. GRB 110128A: Swift/UVOT observations
  92. GRB 110128A: Swift-XRT refined Analysis
  93. GRB 110120A: Suzaku WAM observation of the prompt emission
  94. GRB 110128A: WHT redshifts of nearby field galaxies
  95. GRB 110128A: Enhanced Swift-XRT position
  96. GRB 110128A: Afterglow detection from NOT
  97. GRB 110128A: TAROT Calern observatory upper limits
  98. GRB 110128A: Swift detection of a burst
  99. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  100. GRB 110123A: Fermi GBM detection

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