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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"

26559 results found.

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

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