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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"

28100 results found.

  1. GRB 110312A: Swift/UVOT Upper Limits
  2. GRB 110312A: Swift-XRT refined Analysis
  3. GRB 110312A: GROND Upper Limits
  4. GRB 110312A: Enhanced Swift-XRT position
  5. GRB 110312A: Swift-BAT refined analysis
  6. GRB 110312A: Swift detection of a burst
  7. GRB 110305A: REM detection of a possible NIR afterglow
  8. GRB110305A: MITSuME Ishigakijima Optical upper limits
  9. GRB 110305A: Swift/UVOT Upper Limits
  10. GRB 110305A: Swift-XRT refined Analysis
  11. GRB 110305A: Enhanced Swift-XRT position
  12. GRB 110305A: Swift-BAT refined analysis
  13. GRB 110305A: GROND Detection of Optical Afterglow
  14. GRB 110305A: Swift detection of a burst
  15. GRB 110223A: optical upper limits
  16. GRB 110301A: Fermi GBM detection
  17. Swift/UVOT observations of GRB110223A
  18. No IPN GRB detected in conjunction with candidate GRB 110215
  19. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  20. Swift/UVOT observations of GRB110223b
  21. GRB 110223A: Swift-BAT refined analysis
  22. GRB 110223A : early optical limit by "Pi of the Sky"
  23. GRB 110223A: Liverpool Telescope observations
  24. GRB 110223A: Swift-XRT refined Analysis
  25. GRB 110223B: Swift-XRT refined Analysis
  26. GRB 110223A: Enhanced Swift-XRT position
  27. GRB 110223B: Enhanced Swift-XRT position
  28. GRB 110223B: Swift-BAT refined analysis
  29. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  30. GRB 110223B: Swift detection of a burst
  31. GRB 110223A: Swift detection of a burst
  32. GRB 101225A, the review of the sky area in plate archives
  33. OT 110215: Further NIR observations from NOT of the GRB candidate
  34. GRB 110213B: Swift/UVOT observations
  35. Fermi GBM detection of an SGR-like burst
  36. Swift XRT and UVOT Observations of OT 110215
  37. OT 110215: NIR observations from NOT of GRB candidate
  38. GRB 110213A: optical observations in CrAO
  39. GRB 110213B: GROND observations of the optical/NIR afterglow
  40. OT 110215: possible GRB from 2MASS J00264184+8324093
  41. Swift/UVOT observations of GRB110210a.
  42. GRB 110210A: optical upper limit
  43. GRB 110210A: ROVOR Upper Limit
  44. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  45. GRB 110212A: Swift XRT and UVOT observations
  46. GRB 110205A: Konkoly optical observations
  47. GRB 110213B: Swift XRT observation
  48. GRB 110213A: MITSuME Akeno Optical Observation
  49. Konus-Wind observation of GRB 110213B
  50. GRB 110213A: Swift-XRT refined Analysis
  51. GRB110213A: MITSuME Okayama Optical Observation
  52. GRB 110213A: Swift/UVOT refined analysis
  53. GRB 110213A, Swift-BAT refined analysis
  54. GRB 110213A: optical observations
  55. GRB 110213A: Enhanced Swift-XRT position
  56. GRB110212A: MITSuME Okayama optical upper limits
  57. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  58. GRB 110213A: P60 Optical Afterglow Detection
  59. GRB 110213A: Swift detection of a burst with optical afterglow
  60. GRB 110212A: GRT Optical Observation
  61. GRB 110212A, Swift-BAT refined analysis
  62. GRB 110212A: SARA-N Optical Limits
  63. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  64. GRB 110205A: detection of optical linear polarization from CAHA
  65. GRB 110207A: Suzaku WAM observation of the prompt emission
  66. GRB 110210A: Swift-XRT refined Analysis
  67. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  68. GRB 110210A: Swift-BAT refined analysis
  69. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  70. GRB 110210A: Enhanced Swift-XRT position
  71. GRB 110201A: optical observations
  72. GRB 110210A: Swift detection of a burst
  73. Fermi GBM detection of a burst from 1E 1841-045
  74. Swift/UVOT observations of GRB110208a
  75. GRB 110205A: Suzaku WAM observation of the prompt emission
  76. GRB 110207A: Swift-XRT observations
  77. GRB 110208A: Swift-XRT refined Analysis
  78. GRB 110208A: Enhanced Swift-XRT position
  79. GRB 110208A: Swift-BAT refined analysis
  80. GRB 110208A: Swift detection of a burst
  81. GRB 110205A : HCT optical observations
  82. GRB 110206A: Decay of afterglow candidate
  83. GRB 110207A: TAROT Calern observatory optical observations
  84. GRB 110206A: GROND detection of afterglow candidate
  85. GRB 110207A: Swift-BAT refined analysis
  86. Konus-Wind observation of GRB 110205A
  87. GRB 110206A: Swift detection of a probable X-ray afterglow
  88. GRB 110206A: TAROT La Silla observatory optical observations
  89. GRB 110205A: Lightbuckets Optical Observations
  90. GRB 110206A: a long GRB detected by INTEGRAL
  91. GRB110205A: MITSuME Ishigakijima Optical Observation
  92. GRB110205A: MITSuME Okayama Optical Observation
  93. GRB 110205A: Swift/UVOT Continuing Observations
  94. Observations GRB 110205A
  95. GRB 110205A: Swift-BAT refined analysis
  96. GRB 110205A: Newcastle Observatory Optical Observations
  97. GRB 110205A: Swift-XRT refined Analysis
  98. GRB 110205A: LOAO B/R Observation
  99. GRB 110205A: optical flare confirmation
  100. GRB 110205A: NOT redshift confirmation

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