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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"

23724 results found.

  1. GRB 111215A: Keck/LRIS Imaging
  2. GRB 111225A: Keck/LRIS Afterglow Photometry
  3. GRB 111222A : Suzaku WAM observation of the prompt emission
  4. GRB111225A: MITSuME Okayama optical upper limits
  5. GRB 111225A: Swift-XRT refined Analysis
  6. GRB 111225A, Swift-BAT refined analysis
  7. GRB 111225A: TAROT Calern observatory optical detection
  8. GRB 111225A: TAROT Calern observatory optical observations
  9. GRB 111225A: Swift detection of a burst with an optical counterpart
  10. GRB111222A: GMG optical observation
  11. GRB 111222A: Swift/UVOT Observations
  12. Konus-Wind observation of GRB 111222A
  13. IPN Triangulation of GRB 111222A (short/hard/intense)
  14. GRB 111210A: optical upper limit of Mt. Terskol observatory
  15. Trigger 510075 is not a GRB
  16. GRB 110820A: optical observations in Maidanak observatory
  17. GRB 111103A: optical upper limit of Mt. Terskol observatory
  18. GRB 111215B: Suzaku WAM observation of the prompt emission
  19. GRB 111211A: optical ovservations at Mt. Terskol observatory
  20. GRB111215A: optical upper limit
  21. Konus-Wind observation of GRB 111215B
  22. GRB 111215B: Swift-XRT observations
  23. IPN Triangulation of GRB 111215B (long/intense)
  24. GRB 111215A: WHT, LT and NOT imaging
  25. GRB 111215A: TNG K-band observations
  26. GRB 111215A: MITSuME Okayama Optical upper limits
  27. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  28. GRB 111215A: Swift-BAT refined analysis
  29. GRB 111215A: MASTER-Net optical prompt and follow up observations
  30. GRB 111215A, Optical Observations
  31. GRB 111215A: MITSuME Akeno Optical upper limits
  32. GRB 111215A: GMG optical upper limit
  33. GRB 111215A: Swift detection of a burst
  34. GRB 111201A, the review of the sky area in plate archive
  35. GRB 111212A: GROND observations
  36. GRB 111211A: Swift/UVOT Detection
  37. Konus-Wind observation of GRB 111211A
  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. GRB 111208A: Swift-XRT refined analysis
  46. GRB 111210A: Swift/UVOT Upper Limits
  47. GRB 111210A: Swift-BAT refined analysis
  48. GRB 111210A: Swift detection of a burst
  49. GRB 111209A: GROND Afterglow observations
  50. GRB 111209A: PROMPT optical observations of early afterglow
  51. GRB 111209A: Swift UVOT refined analysis
  52. GRB 111209A: Swift Burst of Interest
  53. GRB 111209A, Swift-BAT refined analysis
  54. GRB111209A : planned XMM-Newton observation
  55. GRB 111209A: TAROT La Silla observatory optical light curve analysis
  56. GRB 111205A: GROND observations
  57. GRB 111209A: Faulkes Telescope North observations
  58. GRB 111209A: TAROT La Silla observatory optical detection
  59. GRB 111209A: Swift detection of a long burst with an optical counterpart
  60. GRB 111207A found in ground analysis of BAT data
  61. GRB 111208A found in ground analysis of BAT data
  62. Konus-Wind observation of GRB 111205A
  63. IPN Triangulation of GRB 111205A (long/hard/intense)
  64. GRB 111204A: TNG NIR observations
  65. GRB 111201A: GMG optical observation
  66. GRB 111204A: GROND Observations
  67. GRB 111204A, Swift-BAT refined analysis
  68. GRB 110921A: optical observations in Maidanak observatory
  69. GRB 111204A: MASTER optical observations
  70. GRB 111204A: Swift detection of a burst
  71. GRB 111201A found in ground analysis of BAT data
  72. GRB 111121A: Suzaku WAM observation of the prompt emission
  73. GRB 111129A, GROND afterglow observations
  74. GRB 111129A: Swift-BAT refined analysis
  75. GRB 111129A: Swift detection of a burst with an optical counterpart
  76. GRB 111126A found in ground analysis of BAT data
  77. GRB 111123A, Swift-BAT refined analysis
  78. GRB 111123A: Swift/UVOT Upper Limits
  79. GRB 111123A, GROND observations
  80. GRB 111123A: correction to GCN 12593
  81. GRB 111123A: TNG NIR detection of the afterglow candidate
  82. GRB 111123A: Swift-XRT refined Analysis
  83. GRB 111123A: MITSuME Okayama Optical upper limits
  84. GRB 111123A: Enhanced Swift-XRT position
  85. GRB 111123A: GMG optical observation
  86. GRB 111117A: Refined Chandra Astrometry
  87. GRB 111123A: Swift detection of a burst
  88. GRB 111117A, the review of the sky area in plate archives
  89. Konus-Wind observation of GRB 111121A
  90. GRB 111121A: Magellan/Megacam observations
  91. GRB 111121A: Swift-BAT refined analysis
  92. GRB 111121A: Swift detection of a short hard burst
  93. GRB 111117A: Gemini Afterglow Limits
  94. GRB 111117A: TNG observations
  95. GRB 111117A: GROND observations
  96. GRB111117A: Magellan IMACS observations
  97. GRB 111117A: NOT observations
  98. GRB 111117A: Swift-BAT refined analysis of a short hard burst
  99. GRB 111117A: GMG upper limit
  100. GRB 111117A: Swift detection of a short hard burst

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