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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"

24458 results found.

  1. GRB 110305A: Swift-BAT refined analysis
  2. IBAS trigger n. 6138 is not a GRB
  3. GRB 110305A: Swift detection of a burst
  4. GRB 110301A: Fermi GBM detection
  5. No IPN GRB detected in conjunction with candidate GRB 110215
  6. GRB GRB 110223A: MASTER VWF early optical observations
  7. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  8. GRB 110223A: Swift-BAT refined analysis
  9. GRB 110223A: Liverpool Telescope observations
  10. GRB 110223B: Swift-BAT refined analysis
  11. Fermi GBM detection of an SGR-like burst
  12. Swift XRT and UVOT Observations of OT 110215
  13. GRB 110213B: GROND observations of the optical/NIR afterglow
  14. GRB 110213A: YNAO-GMG Observations
  15. GRB 110213B: P60 Optical Afterglow Candidate
  16. GRB 110213A: TNT optical observations
  17. GRB 110212A: Swift XRT and UVOT observations
  18. GRB 110213A: Fermi GBM observation
  19. GRB 110205A: Konkoly optical observations
  20. GRB 110213A: MITSuME Akeno Optical Observation
  21. Konus-Wind observation of GRB 110213A
  22. Konus-Wind observation of GRB 110213B
  23. GRB110213A: MITSuME Okayama Optical Observation
  24. GRB 110213A: Lightbuckets Optical Observations
  25. GRB 110213A, Swift-BAT refined analysis
  26. GRB110212A: MITSuME Okayama optical upper limits
  27. GRB 110213A: Bok Telescope Redshift
  28. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  29. GRB 110213A: P60 Optical Afterglow Detection
  30. GRB 110212A, Swift-BAT refined analysis
  31. GRB110212A: BOOTES-2/TELMA optical limits
  32. GRB 110212A: ROTSE-III Optical Limits
  33. GRB 110212A: Swift detection of a burst
  34. GRB 110205A: detection of optical linear polarization from CAHA
  35. GRB 110207A: Suzaku WAM observation of the prompt emission
  36. GRB 110210A: optical upper limit
  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: Swift detection of a burst
  41. Fermi GBM detection of a burst from 1E 1841-045
  42. GRB 110205A: Suzaku WAM observation of the prompt emission
  43. GRB 110208A: Swift-XRT refined Analysis
  44. GRB 110208A: Swift-BAT refined analysis
  45. GRB 110206A: SMARTS optical/IR afterglow decay
  46. GRB 110208A: Swift detection of a burst
  47. GRB 110207A: Fermi GBM observation
  48. GRB 110206A: SMARTS optical/IR afterglow candidate observations
  49. GRB 110205A - Continued PAIRITEL NIR Observations
  50. GRB 110207A: Swift-BAT refined analysis
  51. GRB110205A: CARMA 3mm Observations
  52. GRB 110207A: MASTER prompt and early optical observations
  53. Konus-Wind observation of GRB 110205A
  54. GRB 110207A: Swift detection of a burst
  55. GRB 110205A: Lightbuckets Optical Observations
  56. GRB 110206A: a long GRB detected by INTEGRAL
  57. GRB110205A: MITSuME Ishigakijima Optical Observation
  58. GRB110205A: MITSuME Okayama Optical Observation
  59. GRB 110205A: Swift-BAT refined analysis
  60. GRB 110205A: Newcastle Observatory Optical Observations
  61. GRB 110205A: Swift-XRT refined Analysis
  62. GRB 101225A is likely at z~0
  63. GRB 110205A: PAIRITEL NIR Afterglow Detection
  64. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  65. GRB 110128A: Fermi GBM detection
  66. GRB110201A: MITSuME Okayama optical upper limits
  67. GRB 110201A: Swift-BAT refined analysis
  68. GRB 110201A: MASTER optical observations
  69. GRB110128A: MITSuME Okayama optical upper limits
  70. GRB 110125A: Fermi GBM detection
  71. GRB110128A: TNG NIR observations
  72. GRB 110128A, Swift-BAT refined analysis
  73. GRB 110120A: Suzaku WAM observation of the prompt emission
  74. GRB 110128A: VLT/X-shooter redshift
  75. IBAS Alerts n. 6130 and 6131 are not due to a GRB
  76. Konus-Wind observation of GRB 110120A
  77. GRB 110123A: Fermi GBM detection
  78. GRB 110120A: MASTER optical observations
  79. GRB 110120A: Fermi LAT detection
  80. GRB 110119A: Fermi GBM detection
  81. GRB 110120A: Fermi GBM detection
  82. GRB 110119A: Suzaku WAM observation of the prompt emission
  83. GRB 110120A: MASTER optical observations
  84. GRB 110119A: Swift-XRT refined Analysis
  85. GRB110119A: MITSuME Okayama optical upper limits
  86. GRB 110119A: Swift-BAT refined analysis
  87. GRB 110119A: PAIRITEL NIR Afterglow Detection
  88. GRB 101219B: GROND detection of a SN signature
  89. GRB 101219B: Likely the GRB host emission dominates now in the uvw2 filter
  90. New feature in Fermi GBM GRB Ground Position Notices
  91. Short GRB 110112B : early optical limit by "Pi of the Sky"
  92. GRB 110112B: Fermi GBM observation
  93. GRB 110112B: Swift XRT and UVOT observations of the INTEGRAL burst
  94. GRB 110112A: MITSuME Akeno and Okayama optical upper limits
  95. GRB 101225A: Redshift retraction and results of additional photometric follow-up at the NOT
  96. GRB 110112B: A short GRB detected by INTEGRAL
  97. GRB 110112A: WHT candidate afterglow/host galaxy
  98. GRB 110112A: MASTER optical observations
  99. GRB 110112A: Swift-BAT refined analysis
  100. GRB 110106B: MASTER optical observations

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