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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"

43721 results found.

  1. GRB 120714B: Position Correction and Candidate Optical Afterglow
  2. GRB 120714A: Swift-BAT refined analysis
  3. GRB 120714B: Swift detection of a burst
  4. GRB 120714A: Enhanced Swift-XRT position
  5. GRB 120712A: Fermi GBM observation
  6. GRB 120711A: INTEGRAL/SPI observations
  7. GRB120714A: UVOT non-detection
  8. GRB 120714A: Swift-XRT observations
  9. GRB 120714A: Swift detection of a burst
  10. GRB 120711A: ATCA 34GHz further observations (upper limit)
  11. IPN Triangulation of GRB 120709A
  12. GRB 120712A: Swift/UVOT Detection
  13. GRB 120712A: VLT/Xshooter redshift
  14. GRB 120712A: Swift-XRT refined Analysis
  15. GRB 120712A Gemini-S redshift
  16. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  17. GRB 120712A: Enhanced Swift-XRT position
  18. GRB 120712A: Swift-BAT refined analysis
  19. GRB 120712A: Swift detection of a burst with optical afterglow
  20. GRB 120711B: Swift-XRT refined Analysis
  21. GRB 120711A: Fermi LAT Detection
  22. GRB 120711A: ATCA 34GHz upper limit
  23. GRB 120711B: Swift-BAT refined analysis
  24. GRB 120711B: Swift/UVOT Upper Limits
  25. GRB 120711A: Swift/UVOT Observations
  26. GRB 120709A: Swift/UVOT Observations
  27. Konus-Wind observation of GRB 120711A
  28. GRB 120711A: Fermi LAT detection
  29. GRB 120711A: MASTER early OT detection
  30. GRB 120711A: Swift-XRT observations
  31. GRB 120711A Gemini-S likely redshift
  32. Konus-Wind observation of GRB 120709A
  33. GRB 120711A: REM NIR early time detection
  34. GRB 120711A: GROND photometric redshift
  35. GRB 120711A: Fermi GBM observation
  36. GRB 120711A: MAXI/GSC detection
  37. GRB 120711A: a possible X-ray transient
  38. GRB 120711A: an bright long GRB detected with INTEGRAL
  39. Continued Skynet/PROMPT observations of GRB120711A
  40. Swift detection of GRB 120711B or a new Galactic transient
  41. Skynet/PROMPT Observations of GRB120711A
  42. GRB 120709A: Fermi GBM detection
  43. GRB 120709A: Swift-XRT observations
  44. GRB 120709A: Matched filter analysis of Fermi-LAT data
  45. GRB 120709A: optical afterglow limits
  46. Konus-Wind observation of GRB 120707A
  47. IPN Triangulation of GRB 120707A
  48. GRB 120709A: Fermi-LAT Detection
  49. GRB 120707A: Fermi GBM Detection of a Bright Burst
  50. GRB 120624B: mm detection at PdBI
  51. GRB 120703A: SMARTS optical/IR observations
  52. GRB 120703A: Swift/UVOT Detection
  53. GRB 120703A: Fermi GBM 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. Konus-Wind observation of GRB 120703A
  59. GRB 120703A: NOT optical observation
  60. GRB 120701A: Swift/UVOT Detection
  61. GRB 120701A: GROND detection of the afterglow
  62. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  63. Swift Trigger 525554 is noise
  64. GRB 120701A: Swift-XRT afterglow detection and analysis
  65. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  66. GRB 120701A: Swift-BAT refined analysis
  67. GRB 120630A: NOT optical source within the XRT error circle
  68. Swift Trigger 525554 is probably not a GRB
  69. GRB120624B: Chandra observations and afterglow detection
  70. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  71. GRB 120624B Further Swift-XRT analysis
  72. GRB 120624B: Swift/UVOT Upper Limits
  73. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  74. GRB 120624B: Further analysis of the HAWKI observations
  75. GRB 120624B: Swift-XRT observations
  76. GRB 120624B: GROND upper limits
  77. XRF 120626B: MAXI/GSC detection
  78. GRB 120624B: NIR counterpart candidate from HAWKI
  79. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  80. Swift detection of Ginga 0834-430
  81. GRB 120624B: NOT optical upper limit
  82. Swift detection of IGR J17062-6143
  83. GRB 120624B: optical observations
  84. GRB 120624B, Swift-BAT refined analysis
  85. Konus-Wind observation of GRB 120624B
  86. GRB 120624B: Swift detection of a burst
  87. GRB 120624A: Fermi GBM observation
  88. GRB 120624B: Fermi-LAT Detection
  89. Konus-Wind observation of GRB 120624A
  90. GRB 120624B: Fermi GBM detection
  91. IPN Triangulation of GRB 120624A (short/intense)
  92. Swift Trigger 524949: Noise fluctuation near a galaxy
  93. GRB 120622A: MAXI/GSC detection
  94. Swift trigger 524642 / SwJ1910.2-0546
  95. GRB 120602A: Suzaku WAM observation of the prompt emission
  96. Konus-Wind observation of GRB 120617A
  97. IPN Triangulation of GRB 120617A (short/intense)
  98. Swift Trigger 524642 is Swift J1910.2-0546
  99. Trigger 524584: Swift detection of Algol
  100. Swift triggers (#524542) on a Galactic source

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