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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"

28284 results found.

  1. Swift/UVOT observations of GRB110223A
  2. No IPN GRB detected in conjunction with candidate GRB 110215
  3. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  4. Swift/UVOT observations of GRB110223b
  5. GRB 110223A: Swift-BAT refined analysis
  6. GRB 110223A : early optical limit by "Pi of the Sky"
  7. GRB 110223A: Liverpool Telescope observations
  8. GRB 110223A: Swift-XRT refined Analysis
  9. GRB 110223B: Swift-XRT refined Analysis
  10. GRB 110223A: Enhanced Swift-XRT position
  11. GRB 110223B: Enhanced Swift-XRT position
  12. GRB 110223B: Swift-BAT refined analysis
  13. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  14. GRB 110223B: Swift detection of a burst
  15. GRB 110223A: Swift detection of a burst
  16. GRB 101225A, the review of the sky area in plate archives
  17. OT 110215: Further NIR observations from NOT of the GRB candidate
  18. GRB 110213B: Swift/UVOT observations
  19. Fermi GBM detection of an SGR-like burst
  20. Swift XRT and UVOT Observations of OT 110215
  21. OT 110215: NIR observations from NOT of GRB candidate
  22. GRB 110213A: optical observations in CrAO
  23. GRB 110213B: GROND observations of the optical/NIR afterglow
  24. OT 110215: possible GRB from 2MASS J00264184+8324093
  25. Swift/UVOT observations of GRB110210a.
  26. GRB 110210A: optical upper limit
  27. GRB 110210A: ROVOR Upper Limit
  28. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  29. GRB 110212A: Swift XRT and UVOT observations
  30. GRB 110205A: Konkoly optical observations
  31. GRB 110213B: Swift XRT observation
  32. GRB 110213A: MITSuME Akeno Optical Observation
  33. Konus-Wind observation of GRB 110213B
  34. GRB 110213A: Swift-XRT refined Analysis
  35. GRB110213A: MITSuME Okayama Optical Observation
  36. GRB 110213A: Swift/UVOT refined analysis
  37. GRB 110213A, Swift-BAT refined analysis
  38. GRB 110213A: optical observations
  39. GRB 110213A: Enhanced Swift-XRT position
  40. GRB110212A: MITSuME Okayama optical upper limits
  41. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  42. GRB 110213A: P60 Optical Afterglow Detection
  43. GRB 110213A: Swift detection of a burst with optical afterglow
  44. GRB 110212A: GRT Optical Observation
  45. GRB 110212A, Swift-BAT refined analysis
  46. GRB 110212A: SARA-N Optical Limits
  47. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  48. GRB 110205A: detection of optical linear polarization from CAHA
  49. GRB 110207A: Suzaku WAM observation of the prompt emission
  50. GRB 110210A: Swift-XRT refined Analysis
  51. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  52. GRB 110210A: Swift-BAT refined analysis
  53. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  54. GRB 110210A: Enhanced Swift-XRT position
  55. GRB 110201A: optical observations
  56. GRB 110210A: Swift detection of a burst
  57. Fermi GBM detection of a burst from 1E 1841-045
  58. Swift/UVOT observations of GRB110208a
  59. GRB 110205A: Suzaku WAM observation of the prompt emission
  60. GRB 110207A: Swift-XRT observations
  61. GRB 110208A: Swift-XRT refined Analysis
  62. GRB 110208A: Enhanced Swift-XRT position
  63. GRB 110208A: Swift-BAT refined analysis
  64. GRB 110208A: Swift detection of a burst
  65. GRB 110205A : HCT optical observations
  66. GRB 110206A: Decay of afterglow candidate
  67. GRB 110207A: TAROT Calern observatory optical observations
  68. GRB 110206A: GROND detection of afterglow candidate
  69. GRB 110207A: Swift-BAT refined analysis
  70. Konus-Wind observation of GRB 110205A
  71. GRB 110206A: Swift detection of a probable X-ray afterglow
  72. GRB 110206A: TAROT La Silla observatory optical observations
  73. GRB 110205A: Lightbuckets Optical Observations
  74. GRB 110206A: a long GRB detected by INTEGRAL
  75. GRB110205A: MITSuME Ishigakijima Optical Observation
  76. GRB110205A: MITSuME Okayama Optical Observation
  77. GRB 110205A: Swift/UVOT Continuing Observations
  78. Observations GRB 110205A
  79. GRB 110205A: Swift-BAT refined analysis
  80. GRB 110205A: Newcastle Observatory Optical Observations
  81. GRB 110205A: Swift-XRT refined Analysis
  82. GRB 110205A: LOAO B/R Observation
  83. GRB 110205A: optical flare confirmation
  84. GRB 110205A: NOT redshift confirmation
  85. GRB 110205A: Enhanced Swift-XRT position
  86. GRB 110205A: PAIRITEL NIR Afterglow Detection
  87. GRB 110205A: Swift/UVOT Confirmation of Flaring Afterglow
  88. GRB 110205A: TAROT Calern observatory detection of an optical flare
  89. GRB 110205A: ROTSE-III, Optical Counterpart is flaring to ~14 mag
  90. GRB 110205A: TAROT Calern observatory optical detection
  91. GRB 110205A: Swift detection of a burst with an optical candidate
  92. GRB 110128A: Fermi GBM detection
  93. GRB 110201A: Swift-XRT refined Analysis
  94. GRB110201A: MITSuME Okayama optical upper limits
  95. Swift/UVOT observations of GRB110201A
  96. GRB 110201A: Swift-BAT refined analysis
  97. GRB 110201A: Swift detection of a burst
  98. GRB110112B: EVLA Observations
  99. GRB110112A: EVLA Observations
  100. GRB110128A: MITSuME Okayama optical upper limits

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