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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"

28129 results found.

  1. GRB 120716A: Swift-XRT detection
  2. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  3. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  4. GRB 120716A: Optical decay from NOT
  5. GRB 120716A: Candidate Optical Afterglow from PTF
  6. GRB 120714B: Swift/UVOT Detection
  7. GRB 120714B: Swift-XRT refined Analysis
  8. GRB120714A: Swift/UVOT upper limits
  9. GRB 120714B: Swift-BAT refined analysis
  10. GRB 120714A: GROND upper limits
  11. GRB 120714B: GROND confirmation of fading afterglow
  12. GRB 120714B: Redshift from VLT/X-shooter
  13. GRB 120714A: Swift-XRT refined Analysis
  14. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  15. GRB 120624B: VLA Observations
  16. GRB 120714A: Swift-BAT refined analysis
  17. GRB 120714B: Swift detection of a burst
  18. GRB 120714A: Enhanced Swift-XRT position
  19. GRB 120712A: Fermi GBM observation
  20. GRB 120711A: INTEGRAL/SPI observations
  21. GRB 120714A: Swift-XRT observations
  22. GRB120711B: MITSuME Ishigakijima upper limits
  23. GRB 120714A: Swift detection of a burst
  24. GRB 120712A: Swift/UVOT Detection
  25. GRB 120712A: VLT/Xshooter redshift
  26. GRB 120712A: Swift-XRT refined Analysis
  27. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  28. GRB 120712A: Enhanced Swift-XRT position
  29. GRB 120712A: Swift-BAT refined analysis
  30. GRB 120712A: Swift detection of a burst with optical afterglow
  31. GRB 120711B: Swift-XRT refined Analysis
  32. GRB 120711A: Fermi LAT Detection
  33. GRB 120711B: Swift-BAT refined analysis
  34. GRB 120711B: Swift/UVOT Upper Limits
  35. GRB 120711A: Swift/UVOT Observations
  36. GRB 120711A: Fermi LAT detection
  37. GRB 120711A: MASTER early OT detection
  38. GRB 120711A: Swift-XRT observations
  39. GRB 120711A: REM NIR early time detection
  40. GRB 120711A: GROND photometric redshift
  41. GRB 120711A: Fermi GBM observation
  42. GRB 120711A: an bright long GRB detected with INTEGRAL
  43. Continued Skynet/PROMPT observations of GRB120711A
  44. Swift detection of GRB 120711B or a new Galactic transient
  45. Skynet/PROMPT Observations of GRB120711A
  46. GRB 120709A: Fermi GBM detection
  47. GRB 120709A: Swift-XRT observations
  48. GRB 120709A: optical afterglow limits
  49. IPN Triangulation of GRB 120707A
  50. GRB 120709A: Fermi-LAT Detection
  51. GRB 120707A: Fermi GBM Detection of a Bright Burst
  52. GRB 120624B: mm detection at PdBI
  53. GRB 120703A: Swift/UVOT Detection
  54. GRB 120703A: Swift-XRT refined Analysis
  55. GRB 120703A: Enhanced Swift-XRT position
  56. GRB 120703A: Swift-BAT refined analysis
  57. GRB 120624B Suzaku WAM observation of the prompt emission
  58. GRB 120703A: NOT optical observation
  59. GRB 120701A: Swift/UVOT Detection
  60. GRB 120701A: GROND detection of the afterglow
  61. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  62. GRB 120701A: Swift-XRT afterglow detection and analysis
  63. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  64. GRB 120701A: Swift-BAT refined analysis
  65. Swift Trigger 525554 is probably not a GRB
  66. GRB120624B: Chandra observations and afterglow detection
  67. GRB 120624B: Swift/UVOT Upper Limits
  68. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  69. GRB 120624B: Swift-XRT observations
  70. GRB 120624B: GROND upper limits
  71. GRB 120624B: NIR counterpart candidate from HAWKI
  72. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  73. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  74. Swift detection of Ginga 0834-430
  75. GRB 120624B: NOT optical upper limit
  76. Swift detection of IGR J17062-6143
  77. GRB 120624B: optical observations
  78. GRB 120624B, Swift-BAT refined analysis
  79. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  80. GRB 120624B: Fermi-LAT Detection
  81. GRB 120624B: Fermi GBM detection
  82. IPN Triangulation of GRB 120624A (short/intense)
  83. Swift Trigger 524949: Noise fluctuation near a galaxy
  84. Swift trigger 524642 / SwJ1910.2-0546
  85. GRB 120602A: Suzaku WAM observation of the prompt emission
  86. Konus-Wind observation of GRB 120617A
  87. Swift triggers (#524542) on a Galactic source
  88. IPN Triangulation of GRB 120602A (long/very bright)
  89. GRB 120612A: optical observations
  90. GRB 120612A: Swift/UVOT observations
  91. GRB 120612A: Swift-XRT refined Analysis
  92. GRB 120612A: Swift-BAT refined analysis
  93. GRB 120612A: Enhanced Swift-XRT position
  94. GRB 120612A: BOOTES-3 optical upper limit
  95. GRB 120612A: Swift detection of a burst
  96. GRB 120603A: Suzaku WAM observation of the prompt emission
  97. Konus-Wind observation of GRB 120603A
  98. Konus-Wind observation of GRB 120528B
  99. GRB 120519A: Suzaku WAM observation of the prompt emission
  100. GRB 120528B: MAXI/GSC detection

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