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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"

24475 results found.

  1. GRB 120722A: 1.5m OSN I-band observations
  2. GRB 120722A: Swift-BAT refined analysis
  3. GRB 120722A: Swift detection of a burst
  4. GRB 120716A: Fermi GBM observation
  5. GRB 120716A: Swift-XRT detection
  6. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  7. GRB 120716A: Redshift confirmation from VLT/X-shooter
  8. GRB 120716A: Candidate Optical Afterglow from PTF
  9. Konus-Wind observation of GRB 120716A
  10. IPN Triangulation of unusual GRB 120716A
  11. GRB 120714B: Swift-BAT refined analysis
  12. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  13. GRB 120714A: GROND upper limits
  14. GRB 120714B: GROND confirmation of fading afterglow
  15. GRB 120714B: Redshift from VLT/X-shooter
  16. GRB 120714A: Swift-BAT refined analysis
  17. GRB 120712A: Fermi GBM observation
  18. GRB 120711A: INTEGRAL/SPI observations
  19. GRB 120714A: Swift-XRT observations
  20. GRB120711B: MITSuME Ishigakijima upper limits
  21. GRB 120714A: Swift detection of a burst
  22. GRB 120712A: VLT/Xshooter redshift
  23. GRB 120712A: Swift-BAT refined analysis
  24. GRB 120712A: Swift detection of a burst with optical afterglow
  25. GRB 120711A: Fermi LAT Detection
  26. GRB 120711B: Swift-BAT refined analysis
  27. Konus-Wind observation of GRB 120711A
  28. GRB 120711A: MASTER early OT detection
  29. Konus-Wind observation of GRB 120709A
  30. GRB 120711A: REM NIR early time detection
  31. GRB 120711A: Fermi GBM observation
  32. GRB 120711A: a possible X-ray transient
  33. GRB 120711A: an bright long GRB detected with INTEGRAL
  34. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  35. Skynet/PROMPT Observations of GRB120711A
  36. GRB 120709A: Fermi GBM detection
  37. GRB 120709A: Swift-XRT observations
  38. Konus-Wind observation of GRB 120707A
  39. GRB 120709A: Fermi-LAT Detection
  40. GRB 120707A: Fermi GBM Detection of a Bright Burst
  41. GRB 120703A: SMARTS optical/IR observations
  42. GRB 120703A: Fermi GBM detection
  43. GRB 120703A: Swift-BAT refined analysis
  44. GRB 120624B Suzaku WAM observation of the prompt emission
  45. Konus-Wind observation of GRB 120703A
  46. GRB 120701A: GROND detection of the afterglow
  47. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  48. GRB 120701A: Swift-BAT refined analysis
  49. GRB 120630A: NOT optical source within the XRT error circle
  50. GRB 120624B Further Swift-XRT analysis
  51. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  52. GRB 120624B: Swift-XRT observations
  53. GRB 120624B: GROND upper limits
  54. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  55. Swift detection of Ginga 0834-430
  56. GRB 120624B: NOT optical upper limit
  57. Swift detection of IGR J17062-6143
  58. GRB 120624B, Swift-BAT refined analysis
  59. Konus-Wind observation of GRB 120624B
  60. GRB 120624B: Swift detection of a burst
  61. GRB 120624A: Fermi GBM observation
  62. GRB 120624B: Fermi-LAT Detection
  63. Konus-Wind observation of GRB 120624A
  64. GRB 120624B: Fermi GBM detection
  65. IPN Triangulation of GRB 120624A (short/intense)
  66. Swift trigger 524642 / SwJ1910.2-0546
  67. GRB 120602A: Suzaku WAM observation of the prompt emission
  68. Konus-Wind observation of GRB 120617A
  69. IPN Triangulation of GRB 120617A (short/intense)
  70. Swift Trigger 524642 is Swift J1910.2-0546
  71. Konus-Wind observation of GRB 120602A
  72. IPN Triangulation of GRB 120602A (long/very bright)
  73. GRB 120612A: optical observations
  74. GRB 120612A: Swift-BAT refined analysis
  75. GRB 120603A: Suzaku WAM observation of the prompt emission
  76. Konus-Wind observation of GRB 120603A
  77. IPN Triangulation of short GRB 120603A
  78. Konus-Wind observation of GRB 120528B
  79. GRB 120519A: Suzaku WAM observation of the prompt emission
  80. GRB 120512A: Suzaku WAM observation of the prompt emission
  81. GRB 120521C: EVLA Localization of Afterglow
  82. Konus-Wind observation of GRB 120522A
  83. IPN triangulation of GRB 120522A (long/intense)
  84. GRB 120521B: Fermi GBM observation
  85. GRB 120521C: Early Tautenburg limits
  86. GRB 120521C: Swift-BAT refined analysis
  87. GRB 120521C: MASTER optical limit
  88. GRB 120521B: GROND Upper limits
  89. GRB 120521C: PAIRITEL NIR Upper Limits
  90. GRB 120521C: Swift detection of a burst
  91. GRB 120521B: Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 120519A
  93. Swift starts a new program to find fainter transients
  94. IPN Triangulation of GRB 120519A (short/hard)
  95. GRB 120521A: Swift-BAT refined analysis
  96. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  97. GRB120521B: Faulkes Telescope South observations
  98. GRB 120514A : Suzaku WAM observation of the prompt emission
  99. GRB 120512A: A long GRB detected by INTEGRAL
  100. Konus-Wind observation of GRB 120510A

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