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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"

28260 results found.

  1. Swift/UVOT observations of GRB110210a.
  2. GRB 110210A: optical upper limit
  3. GRB 110210A: ROVOR Upper Limit
  4. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  5. GRB 110212A: Swift XRT and UVOT observations
  6. GRB 110205A: Konkoly optical observations
  7. GRB 110213B: Swift XRT observation
  8. GRB 110213A: MITSuME Akeno Optical Observation
  9. Konus-Wind observation of GRB 110213B
  10. GRB 110213A: Swift-XRT refined Analysis
  11. GRB110213A: MITSuME Okayama Optical Observation
  12. GRB 110213A: Swift/UVOT refined analysis
  13. GRB 110213A, Swift-BAT refined analysis
  14. GRB 110213A: optical observations
  15. GRB 110213A: Enhanced Swift-XRT position
  16. GRB110212A: MITSuME Okayama optical upper limits
  17. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  18. GRB 110213A: P60 Optical Afterglow Detection
  19. GRB 110213A: Swift detection of a burst with optical afterglow
  20. GRB 110212A: GRT Optical Observation
  21. GRB 110212A, Swift-BAT refined analysis
  22. GRB 110212A: SARA-N Optical Limits
  23. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  24. GRB 110205A: detection of optical linear polarization from CAHA
  25. GRB 110207A: Suzaku WAM observation of the prompt emission
  26. GRB 110210A: Swift-XRT refined Analysis
  27. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  28. GRB 110210A: Swift-BAT refined analysis
  29. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  30. GRB 110210A: Enhanced Swift-XRT position
  31. GRB 110201A: optical observations
  32. GRB 110210A: Swift detection of a burst
  33. Fermi GBM detection of a burst from 1E 1841-045
  34. Swift/UVOT observations of GRB110208a
  35. GRB 110205A: Suzaku WAM observation of the prompt emission
  36. GRB 110207A: Swift-XRT observations
  37. GRB 110208A: Swift-XRT refined Analysis
  38. GRB 110208A: Enhanced Swift-XRT position
  39. GRB 110208A: Swift-BAT refined analysis
  40. GRB 110208A: Swift detection of a burst
  41. GRB 110205A : HCT optical observations
  42. GRB 110206A: Decay of afterglow candidate
  43. GRB 110207A: TAROT Calern observatory optical observations
  44. GRB 110206A: GROND detection of afterglow candidate
  45. GRB 110207A: Swift-BAT refined analysis
  46. Konus-Wind observation of GRB 110205A
  47. GRB 110206A: Swift detection of a probable X-ray afterglow
  48. GRB 110206A: TAROT La Silla observatory optical observations
  49. GRB 110205A: Lightbuckets Optical Observations
  50. GRB 110206A: a long GRB detected by INTEGRAL
  51. GRB110205A: MITSuME Ishigakijima Optical Observation
  52. GRB110205A: MITSuME Okayama Optical Observation
  53. GRB 110205A: Swift/UVOT Continuing Observations
  54. Observations GRB 110205A
  55. GRB 110205A: Swift-BAT refined analysis
  56. GRB 110205A: Newcastle Observatory Optical Observations
  57. GRB 110205A: Swift-XRT refined Analysis
  58. GRB 110205A: LOAO B/R Observation
  59. GRB 110205A: optical flare confirmation
  60. GRB 110205A: NOT redshift confirmation
  61. GRB 110205A: Enhanced Swift-XRT position
  62. GRB 110205A: PAIRITEL NIR Afterglow Detection
  63. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  64. GRB 110205A: TAROT Calern observatory detection of an optical flare
  65. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  66. GRB 110205A: TAROT Calern observatory optical detection
  67. GRB 110205A: Swift detection of a burst with an optical candidate
  68. GRB 110128A: Fermi GBM detection
  69. GRB 110201A: Swift-XRT refined Analysis
  70. GRB110201A: MITSuME Okayama optical upper limits
  71. Swift/UVOT observations of GRB110201A
  72. GRB 110201A: Swift-BAT refined analysis
  73. GRB 110201A: Swift detection of a burst
  74. GRB110112B: EVLA Observations
  75. GRB110112A: EVLA Observations
  76. GRB110128A: MITSuME Okayama optical upper limits
  77. GRB 110125A: Fermi GBM detection
  78. GRB 101112A: Maidanak and CrAO optical observations
  79. GRB110128A: TNG NIR observations
  80. GRB 110128A, Swift-BAT refined analysis
  81. GRB 110128A: Swift/UVOT observations
  82. GRB 110128A: Swift-XRT refined Analysis
  83. GRB 110120A: Suzaku WAM observation of the prompt emission
  84. GRB 110128A: WHT redshifts of nearby field galaxies
  85. GRB 110128A: Enhanced Swift-XRT position
  86. GRB 110128A: Afterglow detection from NOT
  87. GRB 110128A: TAROT Calern observatory upper limits
  88. GRB 110128A: Swift detection of a burst
  89. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  90. GRB 110123A: Fermi GBM detection
  91. GRB 110106B, radio observations
  92. GRB 110120A: MASTER optical observations
  93. GRB 101224A, the review of the sky area in plate archives
  94. IPN triangulation of GRB 110120A
  95. GRB 101225A: CQUEAN optical observation
  96. GRB 110106A: CrAO optical observations
  97. GRB 110119A: Fermi GBM detection
  98. GRB 110120A: Fermi GBM detection
  99. GRB 110119A: Suzaku WAM observation of the prompt emission
  100. GRB 110112A: optical upper limit

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