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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"

42478 results found.

  1. GRB 120716A: Swift-XRT detection
  2. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  3. GRB 120716A: Redshift confirmation from VLT/X-shooter
  4. VLT/FORS2 redshift of GRB120716A
  5. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  6. GRB 120716A: Typo correction in GCN 13490
  7. GRB 120716A: Optical decay from NOT
  8. GRB 120716A: Candidate Optical Afterglow from PTF
  9. Konus-Wind observation of GRB 120716A
  10. IPN Triangulation of unusual GRB 120716A
  11. GRB 120711A: ATCA 34GHz final observations (upper limit)
  12. GRB 120714B: Swift/UVOT Detection
  13. GRB 120714B: Swift-XRT refined Analysis
  14. GRB120714A: Swift/UVOT upper limits
  15. GRB 120714B: Swift-BAT refined analysis
  16. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  17. GRB 120714A: GROND upper limits
  18. GRB 120714B: GROND confirmation of fading afterglow
  19. GRB 120714B: Redshift from VLT/X-shooter
  20. GRB 120714A: Swift-XRT refined Analysis
  21. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  22. GRB 120624B: VLA Observations
  23. GRB 120714B: Position Correction and Candidate Optical Afterglow
  24. GRB 120714A: Swift-BAT refined analysis
  25. GRB 120714B: Swift detection of a burst
  26. GRB 120714A: Enhanced Swift-XRT position
  27. GRB 120712A: Fermi GBM observation
  28. GRB 120711A: INTEGRAL/SPI observations
  29. GRB120714A: UVOT non-detection
  30. GRB 120714A: Swift-XRT observations
  31. GRB120711B: MITSuME Ishigakijima upper limits
  32. GRB 120714A: Swift detection of a burst
  33. GRB 120711A: ATCA 34GHz further observations (upper limit)
  34. IPN Triangulation of GRB 120709A
  35. GRB 120712A: Swift/UVOT Detection
  36. GRB 120712A: VLT/Xshooter redshift
  37. GRB 120712A: Swift-XRT refined Analysis
  38. GRB 120712A Gemini-S redshift
  39. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  40. GRB 120712A: Enhanced Swift-XRT position
  41. GRB 120712A: Swift-BAT refined analysis
  42. GRB 120712A: Swift detection of a burst with optical afterglow
  43. GRB 120711B: Swift-XRT refined Analysis
  44. GRB 120711A: Fermi LAT Detection
  45. GRB 120711A: ATCA 34GHz upper limit
  46. GRB 120711B: Swift-BAT refined analysis
  47. GRB 120711B: Swift/UVOT Upper Limits
  48. GRB 120711A: Swift/UVOT Observations
  49. GRB 120709A: Swift/UVOT Observations
  50. Konus-Wind observation of GRB 120711A
  51. GRB 120711A: Fermi LAT detection
  52. GRB 120711A: MASTER early OT detection
  53. GRB 120711A: Swift-XRT observations
  54. Konus-Wind observation of GRB 120709A
  55. GRB 120711A: REM NIR early time detection
  56. GRB 120711A: GROND photometric redshift
  57. GRB 120711A: Fermi GBM observation
  58. GRB 120711A: MAXI/GSC detection
  59. GRB 120711A: an bright long GRB detected with INTEGRAL
  60. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  61. Swift detection of GRB 120711B or a new Galactic transient
  62. GRB 120709A: Fermi GBM detection
  63. GRB 120709A: Swift-XRT observations
  64. GRB 120709A: Matched filter analysis of Fermi-LAT data
  65. GRB 120709A: optical afterglow limits
  66. Konus-Wind observation of GRB 120707A
  67. GRB 120709A: Fermi-LAT Detection
  68. GRB 120707A: Fermi GBM Detection of a Bright Burst
  69. GRB 120624B: mm detection at PdBI
  70. GRB 120703A: SMARTS optical/IR observations
  71. GRB 120703A: Swift/UVOT Detection
  72. GRB 120703A: Fermi GBM detection
  73. GRB 120703A: Swift-XRT refined Analysis
  74. GRB 120703A: Enhanced Swift-XRT position
  75. GRB 120703A: Swift-BAT refined analysis
  76. GRB 120624B Suzaku WAM observation of the prompt emission
  77. Konus-Wind observation of GRB 120703A
  78. GRB 120703A: NOT optical observation
  79. GRB 120701A: Swift/UVOT Detection
  80. GRB 120701A: GROND detection of the afterglow
  81. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  82. Swift Trigger 525554 is noise
  83. GRB 120701A: Swift-XRT afterglow detection and analysis
  84. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  85. GRB 120701A: Swift-BAT refined analysis
  86. GRB 120630A: NOT optical source within the XRT error circle
  87. Swift Trigger 525554 is probably not a GRB
  88. GRB120624B: Chandra observations and afterglow detection
  89. GRB 120624B Further Swift-XRT analysis
  90. GRB 120624B: Swift/UVOT Upper Limits
  91. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  92. GRB 120624B: Further analysis of the HAWKI observations
  93. GRB 120624B: Swift-XRT observations
  94. GRB 120624B: GROND upper limits
  95. XRF 120626B: MAXI/GSC detection
  96. GRB 120624B: NIR counterpart candidate from HAWKI
  97. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  98. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  99. Swift detection of Ginga 0834-430
  100. GRB 120624B: NOT optical upper limit

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