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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"

27630 results found.

  1. VLT/FORS2 redshift of GRB120716A
  2. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  3. GRB 120716A: Optical decay from NOT
  4. GRB 120716A: Candidate Optical Afterglow from PTF
  5. IPN Triangulation of unusual GRB 120716A
  6. Fermi GBM trigger 120716.498 is not a GRB
  7. GRB 120714B: Swift/UVOT Detection
  8. GRB 120714B: Swift-XRT refined Analysis
  9. GRB120714A: Swift/UVOT upper limits
  10. GRB 120714B: Swift-BAT refined analysis
  11. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  12. GRB 120714A: GROND upper limits
  13. GRB 120714B: GROND confirmation of fading afterglow
  14. GRB 120714A: Swift-XRT refined Analysis
  15. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  16. GRB 120714B: Position Correction and Candidate Optical Afterglow
  17. GRB 120714A: Swift-BAT refined analysis
  18. GRB 120714B: Swift detection of a burst
  19. GRB 120712A: Fermi GBM observation
  20. GRB120714A: UVOT non-detection
  21. GRB 120714A: Swift-XRT observations
  22. GRB 120714A: Swift detection of a burst
  23. GRB 120712A: Swift/UVOT Detection
  24. GRB 120712A: VLT/Xshooter redshift
  25. GRB 120712A: Swift-XRT refined Analysis
  26. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  27. GRB 120712A: Swift-BAT refined analysis
  28. GRB 120712A: Swift detection of a burst with optical afterglow
  29. GRB 120711B: Swift-XRT refined Analysis
  30. GRB 120711A: Fermi LAT Detection
  31. GRB 120711B: Swift-BAT refined analysis
  32. GRB 120711B: Swift/UVOT Upper Limits
  33. GRB 120711A: Swift/UVOT Observations
  34. GRB 120709A: Swift/UVOT Observations
  35. Konus-Wind observation of GRB 120711A
  36. GRB 120711A: MASTER early OT detection
  37. GRB 120711A: Swift-XRT observations
  38. Konus-Wind observation of GRB 120709A
  39. GRB 120711A: GROND photometric redshift
  40. GRB 120711A: Fermi GBM observation
  41. Continued Skynet/PROMPT observations of GRB120711A
  42. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  43. Swift detection of GRB 120711B or a new Galactic transient
  44. Skynet/PROMPT Observations of GRB120711A
  45. GRB 120709A: Fermi GBM detection
  46. GRB 120709A: Swift-XRT observations
  47. GRB 120709A: Matched filter analysis of Fermi-LAT data
  48. Konus-Wind observation of GRB 120707A
  49. IPN Triangulation of GRB 120707A
  50. GRB 120709A: Fermi-LAT Detection
  51. GRB 120707A: Fermi GBM Detection of a Bright Burst
  52. GRB 120703A: Swift/UVOT Detection
  53. GRB 120703A: Fermi GBM detection
  54. GRB 120703A: Swift-XRT refined Analysis
  55. GRB 120703A: Swift-BAT refined analysis
  56. GRB 120624B Suzaku WAM observation of the prompt emission
  57. Konus-Wind observation of GRB 120703A
  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. Swift Trigger 525554 is noise
  63. GRB 120701A: Swift-XRT afterglow detection and analysis
  64. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  65. GRB 120701A: Swift-BAT refined analysis
  66. GRB 120630A: NOT optical source within the XRT error circle
  67. Swift Trigger 525554 is probably not a GRB
  68. GRB120624B: Chandra observations and afterglow detection
  69. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  70. GRB 120624B Further Swift-XRT analysis
  71. GRB 120624B: Swift/UVOT Upper Limits
  72. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  73. GRB 120624B: Further analysis of the HAWKI observations
  74. GRB 120624B: Swift-XRT observations
  75. GRB 120624B: GROND upper limits
  76. GRB 120624B: NIR counterpart candidate from HAWKI
  77. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  78. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  79. Swift detection of Ginga 0834-430
  80. GRB 120624B: NOT optical upper limit
  81. Swift detection of IGR J17062-6143
  82. GRB 120624B: optical observations
  83. GRB 120624B, Swift-BAT refined analysis
  84. Konus-Wind observation of GRB 120624B
  85. GRB 120624B: Swift detection of a burst
  86. GRB 120624A: Fermi GBM observation
  87. GRB 120624B: Fermi-LAT Detection
  88. GRB 120624B: Fermi GBM detection
  89. IPN Triangulation of GRB 120624A (short/intense)
  90. Swift Trigger 524949: Noise fluctuation near a galaxy
  91. Swift trigger 524642 / SwJ1910.2-0546
  92. Swift Trigger 524642 is Swift J1910.2-0546
  93. Trigger 524584: Swift detection of Algol
  94. Swift triggers (#524542) on a Galactic source
  95. IPN Triangulation of GRB 120602A (long/very bright)
  96. GRB 120612A: Swift/UVOT observations
  97. GRB 120612A: Swift-XRT refined Analysis
  98. GRB 120612A: Swift-BAT refined analysis
  99. GRB 120612A: BOOTES-3 optical upper limit
  100. GRB 120612A: Swift detection of a burst

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