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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"

24513 results found.

  1. GRB 111228A: MASTER OT observations
  2. GRB 111228A: NOT optical observation
  3. GRB 111228A, Swift-BAT refined analysis
  4. GRB 111228A: optical observations
  5. GRB 111228A: Fermi GBM observation
  6. GRB111228A: MITSuME Okayama Optical Observation
  7. GRB 111228A: Xinglong TNT confirms the optical afterglow
  8. GRB 111228A: Swift detection of a burst with an optical counterpart
  9. GRB 111225A: Keck/LRIS Afterglow Photometry
  10. GRB 111222A : Suzaku WAM observation of the prompt emission
  11. GRB111225A: MITSuME Okayama optical upper limits
  12. GRB 111225A: 1.23m CAHA optical observations
  13. GRB 111225A: Swift-XRT refined Analysis
  14. GRB 111225A, Swift-BAT refined analysis
  15. GRBv111225A: Xinglong TNT optical afterglow
  16. GRB 111222A: Xinglong TNT observation
  17. GRB 111222A: Swift-XRT observations
  18. IPN Triangulation of GRB 111222A (short/hard/intense)
  19. XRT GRB Catalogue now live and online
  20. GRB 111215B: Suzaku WAM observation of the prompt emission
  21. Konus-Wind observation of GRB 111215B
  22. GRB 111205A: Confirmation of X-ray Afterglow
  23. IPN Triangulation of GRB 111215B (long/intense)
  24. GRB111215A: Pre-Outburst Palomar 48 inch Imaging
  25. GRB 111215A: TNG K-band observations
  26. GRB 111215A: MITSuME Okayama Optical upper limits
  27. GRB 111215A: Swift-XRT refined Analysis
  28. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  29. GRB 111215A: Swift-BAT refined analysis
  30. GRB 111215A: OSN I-band observations
  31. GRB 111215A: MASTER-Net optical prompt and follow up observations
  32. GRB 111215A, Optical Observations
  33. GRB 111215A: MITSuME Akeno Optical upper limits
  34. GRB 111215A : Xinglong TNT upper limit
  35. GRB 111211A: Swift/UVOT Detection
  36. Konus-Wind observation of GRB 111211A
  37. GRB 111211A: NOT afterglow confirmation
  38. GRB 111212A: Swift-BAT refined analysis
  39. GRB 111211A: GROND afterglow candidate
  40. GRB 111212A: Swift detection of a burst
  41. GRB 111211A: SuperAGILE localization of a long GRB
  42. Konus-Wind observation of GRB 111209A
  43. GRB 111210A: GROND observations
  44. GRB 111210A: MITSuME Okayama Optical upper limits
  45. GRB111210A: MITSuME Okayama J-band upper-limit
  46. GRB 111210A: Swift-BAT refined analysis
  47. GRB 111210A: Swift detection of a burst
  48. GRB 111209A: GROND Afterglow observations
  49. GRB 111209A optical limit by "Pi of the Sky"
  50. GRB 111209A: PROMPT optical observations of early afterglow
  51. GRB 111208A: Lightbuckets Optical Observations
  52. GRB 111209A, Swift-BAT refined analysis
  53. GRB 111205A: GROND observations
  54. GRB 111209A: Faulkes Telescope North observations
  55. GRB 111209A: REM NIR detection
  56. GRB 111209A: Swift detection of a long burst with an optical counterpart
  57. GRB 111208A: Swift XRT/UVOT observations
  58. GRB 111205A: Swift XRT Observations
  59. Konus-Wind observation of GRB 111205A
  60. IPN Triangulation of GRB 111205A (long/hard/intense)
  61. GRB 111204A: GROND Observations
  62. GRB 111204A, Swift-BAT refined analysis
  63. GRB 111204A: MASTER optical observations
  64. GRB 111204A: Swift detection of a burst
  65. GRB 111201A found in ground analysis of BAT data
  66. GRB 111121A: Suzaku WAM observation of the prompt emission
  67. GRB 111129A: Swift/UVOT Detection
  68. GRB 111129A, GROND afterglow observations
  69. GRB 111129A: Swift-BAT refined analysis
  70. GRB 111129A: Swift detection of a burst with an optical counterpart
  71. GRB 111123A, Swift-BAT refined analysis
  72. GRB 111123A - NOT optical observations
  73. GRB 111123A, GROND observations
  74. GRB 111123A: Swift-XRT refined Analysis
  75. GRB 111123A: MITSuME Okayama Optical upper limits
  76. GRB 111121A: Magellan/Megacam observations
  77. GRB 111121A: Swift-BAT refined analysis
  78. GRB 111117A: Chandra detection of the afterglow
  79. GRB 111117A: Fermi GBM observation
  80. GRB 111117A: further NOT observations
  81. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  82. GRB 111117A: Swift detection of a short hard burst
  83. IPN Triangulation of GRB 111113A (short/hard/intense)
  84. GRB 111109A: Swift-BAT refined analysis
  85. GRB 111109A: Swift detection of a burst
  86. GRB 111107A: Fermi GBM observation
  87. GRB 111107A: Swift-XRT refined Analysis
  88. GRB 111107A: VLT/X-shooter spectroscopy
  89. GRB 111107A: Swift-BAT refined analysis
  90. GRB 111107A: GROND observations
  91. GRB 111103B: MITSuME Akeno Optical upper limits
  92. Konus-Wind observation of GRB 111103B
  93. GRB 111103A: Fermi GBM observation
  94. Trigger 506913: MASTER detection of Swift J1922.7-1716 optical counterpart
  95. GRB 111103B: Swift-BAT refined analysis
  96. GRB 111103A: Swift-BAT refined analysis
  97. GRB 111022B: MASTER OT observations
  98. GRB 111103B: optical observations
  99. GRB 111103B: Swift detection of a strong burst from a GRB or Galactic source
  100. GRB 111103A: Swift detection of a burst

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