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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"

26516 results found.

  1. GRB 120804A: Swift-XRT refined Analysis
  2. GRB 120804A: GROND upper limits
  3. GRB 120804A: Enhanced Swift-XRT position
  4. GRB 120804A: Swift detection of a short burst
  5. GRB 120803B: Swift-BAT refined analysis
  6. GRB 120803B: Enhanced Swift-XRT position
  7. GRB 120803A: Swift-XRT Observations
  8. GRB 120803A: Swift-BAT refined analysis
  9. GRB 120803B: FTN possible afterglow candidate
  10. GRB 120803B: Swift detection of a burst
  11. GRB 120803A: Swift detection of a possible burst
  12. GRB 120802A: GRT Optical Observation
  13. GRB 120802A: Swift-XRT refined Analysis
  14. GRB 120729A: Fermi GBM observation
  15. GRB 120802A: Swift-BAT refined analysis
  16. GRB 120802A: Enhanced Swift-XRT position
  17. GRB 120802A: Swift detection of a burst
  18. GRB 120728B: Fermi GBM detection
  19. Konus-Wind observation of GRB 120728B
  20. GRB 120729A: break in the optical light curve
  21. IPN Triangulation of GRB 120728B (long/intense)
  22. Virtual Telescope observations of GRB 120729A
  23. GRB 120729A: UKIRT Observation
  24. T100 observations of GRB 120729A
  25. GRB 120728A: GROND Afterglow discovery
  26. GRB 120729A: Swift-XRT refined Analysis
  27. GRB 120729A: Swift/UVOT Detection
  28. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  29. GRB 120729A, Swift-BAT refined analysis
  30. GRB 120728A, Swift-BAT refined analysis
  31. GRB 120729A: Enhanced Swift-XRT position
  32. GRB 120729A: Swift detection of a burst with an optical afterglow
  33. GRB 120728A: Swift-XRT refined Analysis
  34. GRB 120728A: Enhanced Swift-XRT position
  35. GRB 120728A: Swift detection of a burst
  36. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  37. GRB 120724A, Swift-BAT refined analysis
  38. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  39. GRB 120724A: Enhanced Swift-XRT position
  40. GRB 120724A: Swift-XRT refined Analysis
  41. GRB120711A: Planned XMM-Newton observation
  42. GRB 120724A: Swift detection of a burst
  43. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  44. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  45. GRB 120722A: Swift-XRT refined Analysis
  46. GRB 120722A: Swift-BAT refined analysis
  47. GRB 120722A: Enhanced Swift-XRT position
  48. GRB 120722A: Correction for GCN circ.13500
  49. GRB 120722A: Swift detection of a burst
  50. GRB 120716A: Fermi GBM observation
  51. GRB 120716A: Swift-XRT detection
  52. GRB 120716A: Redshift confirmation from VLT/X-shooter
  53. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  54. Konus-Wind observation of GRB 120716A
  55. IPN Triangulation of unusual GRB 120716A
  56. GRB 120711A: ATCA 34GHz final observations (upper limit)
  57. GRB 120714B: Swift/UVOT Detection
  58. GRB 120714B: Swift-BAT refined analysis
  59. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  60. GRB 120714B: GROND confirmation of fading afterglow
  61. GRB 120714A: Swift-XRT refined Analysis
  62. GRB 120714A: Swift-BAT refined analysis
  63. GRB 120714B: Swift detection of a burst
  64. GRB 120714A: Enhanced Swift-XRT position
  65. GRB 120712A: Fermi GBM observation
  66. GRB 120711A: INTEGRAL/SPI observations
  67. GRB 120714A: Swift detection of a burst
  68. GRB 120711A: ATCA 34GHz further observations (upper limit)
  69. IPN Triangulation of GRB 120709A
  70. GRB 120712A: Swift/UVOT Detection
  71. GRB 120712A: Swift-XRT refined Analysis
  72. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  73. GRB 120712A: Enhanced Swift-XRT position
  74. GRB 120712A: Swift-BAT refined analysis
  75. GRB 120712A: Swift detection of a burst with optical afterglow
  76. GRB 120711A: Fermi LAT Detection
  77. GRB 120711A: ATCA 34GHz upper limit
  78. GRB 120711B: Swift-BAT refined analysis
  79. Konus-Wind observation of GRB 120711A
  80. Konus-Wind observation of GRB 120709A
  81. GRB 120711A: REM NIR early time detection
  82. GRB 120711A: GROND photometric redshift
  83. GRB 120711A: Fermi GBM observation
  84. GRB 120711A: MAXI/GSC detection
  85. GRB 120711A: an bright long GRB detected with INTEGRAL
  86. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  87. Swift detection of GRB 120711B or a new Galactic transient
  88. GRB 120709A: Fermi GBM detection
  89. GRB 120709A: Matched filter analysis of Fermi-LAT data
  90. Konus-Wind observation of GRB 120707A
  91. IPN Triangulation of GRB 120707A
  92. GRB 120709A: Fermi-LAT Detection
  93. GRB 120707A: Fermi GBM Detection of a Bright Burst
  94. GRB 120624B: mm detection at PdBI
  95. GBM triggers 120705.153 & 120705.322 were not GRBs
  96. GRB 120703A: Fermi GBM detection
  97. GRB 120703A: Swift-XRT refined Analysis
  98. GRB 120703A: Enhanced Swift-XRT position
  99. GRB 120703A: Swift-BAT refined analysis
  100. GRB 120624B Suzaku WAM observation of the prompt emission

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