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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"

28131 results found.

  1. GRB 110328A: Enhanced Swift-XRT position
  2. GRB 110328A: Swift detection of a burst
  3. GRB 110319B Swift-XRT afterglow confirmation
  4. GRB 110319B BAT refined analysis
  5. GRB 110319B: Swift/UVOT Upper Limits
  6. GRB 110318B: Swift/UVOT Upper Limits
  7. GRB 110319B: GROND upper limits
  8. GRB 110319B: Swift-XRT afterglow candidate.
  9. GRB 110319B found in ground analysis of Swift-BAT data
  10. GRB 110319A: Swift/UVOT Detection
  11. GRB 110319A: Swift-BAT refined analysis
  12. GRB 110319A: Swift-XRT refined Analysis
  13. GRB 110318B: GROND upper limits
  14. GRB 110319A: Enhanced Swift-XRT position
  15. GRB 110319A: Swift detection of a burst
  16. GRB 110318B: Swift-XRT refined Analysis
  17. GRB 110318A: Fermi GBM detection
  18. GRB 110318B: Swift-BAT refined analysis
  19. GRB 110318B: Enhanced Swift-XRT position
  20. GRB 110318A: Swift-BAT refined analysis
  21. GRB 110318B: Swift/UVOT Non-Detection of an Afterglow
  22. GRB 110318B: Swift detection of a burst
  23. GRB 110315A: RTT150 optical observations
  24. GRB 110315A: Swift/UVOT Upper Limits
  25. GRB 110315A: Swift-XRT refined Analysis
  26. GRB 110315A: Swift-BAT refined analysis
  27. GRB 110315A: Enhanced Swift-XRT position
  28. GRB 110315A: MASTER early optical observations
  29. GRB 110315A: Swift detection of a burst
  30. GRB110312A: MITSuME Okayama Optical upper limits
  31. GRB 110312A: RTT150 optical observations
  32. GRB 110312A: Swift/UVOT Upper Limits
  33. GRB 110312A: Swift-XRT refined Analysis
  34. GRB 110312A: GROND Upper Limits
  35. GRB 110312A: Enhanced Swift-XRT position
  36. GRB 110312A: Swift-BAT refined analysis
  37. GRB 110312A: Swift detection of a burst
  38. GRB 110305A: REM detection of a possible NIR afterglow
  39. GRB110305A: MITSuME Ishigakijima Optical upper limits
  40. GRB 110305A: Swift/UVOT Upper Limits
  41. GRB 110305A: Swift-XRT refined Analysis
  42. GRB 110305A: Enhanced Swift-XRT position
  43. GRB 110305A: Swift-BAT refined analysis
  44. GRB 110305A: GROND Detection of Optical Afterglow
  45. GRB 110305A: Swift detection of a burst
  46. GRB 110223A: optical upper limits
  47. GRB 110301A: Fermi GBM detection
  48. Swift/UVOT observations of GRB110223A
  49. No IPN GRB detected in conjunction with candidate GRB 110215
  50. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  51. Swift/UVOT observations of GRB110223b
  52. GRB 110223A: Swift-BAT refined analysis
  53. GRB 110223A : early optical limit by "Pi of the Sky"
  54. GRB 110223A: Liverpool Telescope observations
  55. GRB 110223A: Swift-XRT refined Analysis
  56. GRB 110223B: Swift-XRT refined Analysis
  57. GRB 110223A: Enhanced Swift-XRT position
  58. GRB 110223B: Enhanced Swift-XRT position
  59. GRB 110223B: Swift-BAT refined analysis
  60. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  61. GRB 110223B: Swift detection of a burst
  62. GRB 110223A: Swift detection of a burst
  63. GRB 101225A, the review of the sky area in plate archives
  64. OT 110215: Further NIR observations from NOT of the GRB candidate
  65. GRB 110213B: Swift/UVOT observations
  66. Fermi GBM detection of an SGR-like burst
  67. Swift XRT and UVOT Observations of OT 110215
  68. OT 110215: NIR observations from NOT of GRB candidate
  69. GRB 110213A: optical observations in CrAO
  70. GRB 110213B: GROND observations of the optical/NIR afterglow
  71. OT 110215: possible GRB from 2MASS J00264184+8324093
  72. Swift/UVOT observations of GRB110210a.
  73. GRB 110210A: optical upper limit
  74. GRB 110210A: ROVOR Upper Limit
  75. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  76. GRB 110212A: Swift XRT and UVOT observations
  77. GRB 110205A: Konkoly optical observations
  78. GRB 110213B: Swift XRT observation
  79. GRB 110213A: MITSuME Akeno Optical Observation
  80. Konus-Wind observation of GRB 110213B
  81. GRB 110213A: Swift-XRT refined Analysis
  82. GRB110213A: MITSuME Okayama Optical Observation
  83. GRB 110213A: Swift/UVOT refined analysis
  84. GRB 110213A, Swift-BAT refined analysis
  85. GRB 110213A: optical observations
  86. GRB 110213A: Enhanced Swift-XRT position
  87. GRB110212A: MITSuME Okayama optical upper limits
  88. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  89. GRB 110213A: P60 Optical Afterglow Detection
  90. GRB 110213A: Swift detection of a burst with optical afterglow
  91. GRB 110212A: GRT Optical Observation
  92. GRB 110212A, Swift-BAT refined analysis
  93. GRB 110212A: SARA-N Optical Limits
  94. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  95. GRB 110205A: detection of optical linear polarization from CAHA
  96. GRB 110207A: Suzaku WAM observation of the prompt emission
  97. GRB 110210A: Swift-XRT refined Analysis
  98. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  99. GRB 110210A: Swift-BAT refined analysis
  100. Swift-BAT refined analysis of outburst from 1E 1841-04.5

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