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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"

28249 results found.

  1. GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
  2. GRB 120816A: Bassano Bresciano Observatory optical observations
  3. GRB 120817A: FTN and FTS observations
  4. GRB 120816A: Swift-XRT refined Analysis
  5. GRB 120817A: Swift-XRT observations
  6. GRB 120816A: Enhanced Swift-XRT position
  7. GRB 120816A: Swift-BAT refined analysis
  8. GRB 120816A: BOOTES-2 observations
  9. GRB120816A: OPTIMA discovery of optical counterpart
  10. GRB 120816A: TAROT Calern observatory optical observations
  11. GRB 120816A: ROTSE-III Optical Limits
  12. GRB 120816A: Swift detection of a burst
  13. GRB 120815A: Swift-XRT refined Analysis
  14. GRB 120815A: Swift-BAT refined analysis
  15. GRB 120805A: Liverpool Telescope optical candidate detection
  16. GRB 120815A: Enhanced Swift-XRT position
  17. GRB 120815A: VLT/X-shooter redshift
  18. GRB 120815A: GROND afterglow candidate
  19. GRB 120815A: Swift-XRT observations
  20. GRB 120815A: TAROT La Silla observatory optical observations
  21. GRB 120815A: Swift detection of a burst
  22. GCN for GRB 120811C
  23. GRB 120811A: Swift/XRT-UVOT Obseravations
  24. GRB120804A: Chandra observations and afterglow detection
  25. GRB 120805A: optical afterglow confirmation from the NOT
  26. GRB 120805A: Enhanced Swift-XRT position
  27. GRB 120811C: RTT150 optical observations
  28. GRB 120811C: MASTER-Tunka OT observations
  29. GRB 120811C: Swift-BAT refined analysis
  30. GRB 120811A: Swift-BAT refined analysis
  31. GRB 120811C: Bassano Bresciano Observatory optical observations
  32. GRB 120811C: Swift-XRT refined Analysis
  33. GRB 120811C: Swift/UVOT Detection
  34. GRB 120811C: RTT150 optical observations
  35. GRB 120811C: Enhanced Swift-XRT position
  36. GRB 120811C: TAROT Calern observatory optical observations
  37. GRB 120811C: Swift detection of a burst with an optical counterpart
  38. Trigger 530588: Swift detection of XMM J174457-2850.3
  39. GRB 120803A: optical upper limit
  40. GRB 120807A: Swift/UVOT Upper Limits
  41. GRB 120714B: GROND/FORS2 detection of a supernova
  42. GRB 120807A: Swift-XRT refined Analysis
  43. GRB 120802A: optical observations
  44. GRB 120807A: Fermi/LAT upper limit
  45. GRB 120807A: RAPTOR Limits During Gamma-Ray Emitting Interval
  46. GRB 120807A: TAROT La Silla observatory optical observations
  47. GRB 120807A: Swift-BAT refined analysis
  48. GRB 120807A: Enhanced Swift-XRT position
  49. GRB 120807A: Swift detection of a burst
  50. Fermi/GBM detection of an SGR-like burst
  51. GRB 120805A: Swift/UVOT Upper Limits
  52. Swift trigger 530214: uncertain if real or not
  53. GRB 120728A: Fermi GBM observation
  54. GRB 120805A: Swift-BAT refined analysis
  55. GRB 120802A: Swift/UVOT Upper Limits
  56. GRB 120805A: Swift-XRT refined Analysis
  57. GRB 120805A: TAROT Calern observatory optical observations
  58. GRB 120805A: Swift detection of a burst
  59. GRB 120804A: MITSuME Okayama Optical upper limits
  60. GRB 120803B: Swift-XRT refined Analysis
  61. GRB 120804A: Swift/UVOT Upper Limits
  62. GRB 120804A: Swift-BAT refined analysis
  63. GRB 120804A: Swift-XRT refined Analysis
  64. GRB 120804A: GROND upper limits
  65. GRB 120804A: Enhanced Swift-XRT position
  66. GRB 120803B: MITSuME Okayama Optical upper limits
  67. GRB 120803A: MITSuME Okayama Optical upper limits
  68. GRB 120804A: Swift detection of a short burst
  69. GRB 120803B: Swift-BAT refined analysis
  70. GRB 120803B: Enhanced Swift-XRT position
  71. GRB 120803A: Swift-BAT refined analysis
  72. GRB 120803B: FTN possible afterglow candidate
  73. GRB 120803B: Swift detection of a burst
  74. GRB 120803A: Swift detection of a possible burst
  75. GRB 120802A: GRT Optical Observation
  76. GRB 120802A: Swift-XRT refined Analysis
  77. GRB 120802A: APEX/LABOCA submm observations
  78. GRB 120729A: Fermi GBM observation
  79. GRB 120802A: Swift-BAT refined analysis
  80. GRB 120802A: Enhanced Swift-XRT position
  81. GRB 120802A: MASTER optical observations
  82. GRB 120802A: optical uper limit in ISON-NM observatory
  83. GRB 120802A: Swift detection of a burst
  84. GRB 120728B: Fermi GBM detection
  85. GRB 120729A: RTT150 optical observations
  86. Virtual Telescope observations of GRB 120729A
  87. T100 observations of GRB 120729A
  88. GRB 120728A: GROND Afterglow discovery
  89. GRB 120729A: Swift-XRT refined Analysis
  90. GRB 120729A: Swift/UVOT Detection
  91. GRB 120729A, Swift-BAT refined analysis
  92. GRB 120728A, Swift-BAT refined analysis
  93. GRB 120729A: Enhanced Swift-XRT position
  94. GRB 120728A: Swift/UVOT Upper Limits
  95. GRB 120729A: Swift detection of a burst with an optical afterglow
  96. GRB 120728A: Swift-XRT refined Analysis
  97. GRB 120728A: Enhanced Swift-XRT position
  98. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  99. GRB 120728A: GROND observations
  100. GRB 120728A: Swift detection of a burst

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