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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"

43033 results found.

  1. GRB 110312A: Swift-BAT refined analysis
  2. GRB 110312A: Swift detection of a burst
  3. GRB 110305A: REM detection of a possible NIR afterglow
  4. GRB110305A: MITSuME Ishigakijima Optical upper limits
  5. GRB 110305A: Swift/UVOT Upper Limits
  6. GRB 110305A: Enhanced Swift-XRT position
  7. GRB 110305A: Swift-BAT refined analysis
  8. IBAS trigger n. 6138 is not a GRB
  9. GRB 110305A: GROND Detection of Optical Afterglow
  10. GRB 110305A: Swift detection of a burst
  11. GRB 110223A: optical upper limits
  12. GRB 110301A: Fermi GBM detection
  13. GRB101225A: early EVLA Observations of Christmas Burst
  14. Swift/UVOT observations of GRB110223A
  15. No IPN GRB detected in conjunction with candidate GRB 110215
  16. GRB GRB 110223A: MASTER VWF early optical observations
  17. IBAS distribution of coordinates for low significance INTEGRAL GRB triggers
  18. Swift/UVOT observations of GRB110223b
  19. GRB 110223A : early optical limit by "Pi of the Sky"
  20. GRB 110223A: Liverpool Telescope observations
  21. GRB 110223A: Swift-XRT refined Analysis
  22. GRB 110223B: Swift-XRT refined Analysis
  23. GRB 110223A: Enhanced Swift-XRT position
  24. GRB 110223B: Enhanced Swift-XRT position
  25. GRB 110223B: GROND Detection of Optical Afterglow Candidate
  26. GRB 110223A: Observations from BOOTES-2
  27. GRB 110223B: Swift detection of a burst
  28. GRB 110223A: Swift detection of a burst
  29. GRB 101225A, the review of the sky area in plate archives
  30. OT 110215: Further NIR observations from NOT of the GRB candidate
  31. GRB 110213B: Swift/UVOT observations
  32. GRB110213B: X-ray afterglow confirmation
  33. Fermi GBM detection of an SGR-like burst
  34. Swift XRT and UVOT Observations of OT 110215
  35. OT 110215: NIR observations from NOT of GRB candidate
  36. GRB 110213B: GROND observations of the optical/NIR afterglow
  37. GRB 110213A: optical observations in Mondy
  38. GRB110205A: EVLA Observations
  39. OT 110215: possible GRB from 2MASS J00264184+8324093
  40. Swift/UVOT observations of GRB110210a.
  41. GRB 110210A: optical upper limit
  42. GRB 110213B: Gemini South Redshift
  43. GRB 110213B: Possible Host Galaxy in SDSS Stripe 82 Imaging
  44. GRB 110210A: ROVOR Upper Limit
  45. GRB 110213B: P60 Optical Afterglow Candidate
  46. GRB110213A: RAPTOR Early Optical Peak and Plateau Measurements
  47. GRB 110212A: Swift XRT and UVOT observations
  48. Swift GRB110213A: interesting behaviour
  49. GRB 110213A: Fermi GBM observation
  50. GRB 110213B: Swift XRT observation
  51. GRB 110213A: MITSuME Akeno Optical Observation
  52. Konus-Wind observation of GRB 110213A
  53. Konus-Wind observation of GRB 110213B
  54. GRB 110213A: Swift-XRT refined Analysis
  55. GRB110213A: MITSuME Okayama Optical Observation
  56. GRB 110213A: Swift/UVOT refined analysis
  57. GRB 110213A: THO optical observations
  58. GRB 110213B: MAXI/GSC detection of a probable GRB
  59. GRB 110213A: Lightbuckets Optical Observations
  60. GRB 110213A, Swift-BAT refined analysis
  61. GRB 110213A: Enhanced Swift-XRT position
  62. GRB110212A: MITSuME Okayama optical upper limits
  63. GRB 110213A: KAIT observations
  64. GRB 110213A: GRAS011 optical observations
  65. GRB 110213A: Bok Telescope Redshift
  66. GRB 110213A: ROTSE-III Detection of Optical Counterpart
  67. GRB 110213A: P60 Optical Afterglow Detection
  68. GRB 110213A: Swift detection of a burst with optical afterglow
  69. GRB 110212A: GRT Optical Observation
  70. GRB 110212A, Swift-BAT refined analysis
  71. GRB 110212A: SARA-N Optical Limits
  72. GRB110212A: BOOTES-2/TELMA optical limits
  73. GRB 110212A: ROTSE-III Optical Limits
  74. GRB 110212A: Swift detection of a burst
  75. GRB 110201A: Subaru/MOIRCS Ks-band photometry
  76. Konus-Wind observation of GRB 110205A (correction to GCN 11659)
  77. GRB 110207A: Suzaku WAM observation of the prompt emission
  78. GRB 110210A: optical upper limit
  79. GRB 110210A: Swift-XRT refined Analysis
  80. GRB 110205A: Swift/BAT and Suzaku/WAM joint spectral analysis
  81. GRB 110210A: Swift-BAT refined analysis
  82. Swift-BAT refined analysis of outburst from 1E 1841-04.5
  83. GRB 110210A: Enhanced Swift-XRT position
  84. GRB 110201A: optical observations
  85. GRB 110210A: Swift detection of a burst
  86. GRB 110208A: Magellan confirmation of the optical afterglow
  87. Fermi GBM detection of a burst from 1E 1841-045
  88. Swift/UVOT observations of GRB110208a
  89. GRB 110205A: Suzaku WAM observation of the prompt emission
  90. GRB 110208A: Potential afterglow from Magellan
  91. GRB 110207A: Swift-XRT observations
  92. GRB 110208A: Enhanced Swift-XRT position
  93. GRB 110208A: Swift-BAT refined analysis
  94. GRB 110208A: Magellan optical observations
  95. GRB 110206A: SMARTS optical/IR afterglow decay
  96. GRB 110208A: Swift detection of a burst
  97. SGR-like outburst from the magnetar 1E 1841-04.5
  98. GRB 110205A: optical observations in Mondy observatory
  99. GRB 110207A: Fermi GBM observation
  100. GRB 110205A : HCT optical observations

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