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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"

27941 results found.

  1. GRB 120805A: Swift-XRT refined Analysis
  2. GRB120805A: Liverpool Telescope observations
  3. GRB 120805A: TAROT Calern observatory optical observations
  4. GRB 120805A: Swift detection of a burst
  5. GRB 120804A: EVLA Detection
  6. GRB 120804A: Swift-BAT Spectral lag analysis
  7. GRB 120803B: Swift-XRT refined Analysis
  8. GRB 120804A: Swift/UVOT Upper Limits
  9. GRB 120804A: Swift-BAT refined analysis
  10. GRB 120804A: Swift-XRT refined Analysis
  11. GRB 120804A: GROND upper limits
  12. GRB 120802A: EVLA Observations
  13. GRB 120804A: Enhanced Swift-XRT position
  14. GRB 120804A: Swift detection of a short burst
  15. GRB 120803B: Swift-BAT refined analysis
  16. GRB 120803B: Enhanced Swift-XRT position
  17. GRB 120803A: Swift-XRT Observations
  18. GRB 120803A: Swift-BAT refined analysis
  19. GRB 120803B: FTN possible afterglow candidate
  20. GRB 120803B: Swift detection of a burst
  21. GRB 120803A: Swift detection of a possible burst
  22. GRB 120802A: GRT Optical Observation
  23. GRB 120802A: Swift-XRT refined Analysis
  24. GRB 120729A: Fermi GBM observation
  25. GRB 120802A: Swift-BAT refined analysis
  26. GRB 120802A: Enhanced Swift-XRT position
  27. GRB 120802A: MASTER optical observations
  28. GRB 120802A: Swift detection of a burst
  29. GRB 120728B: Fermi GBM detection
  30. Konus-Wind observation of GRB 120728B
  31. GRB 120729A: break in the optical light curve
  32. GRB 120729A: RTT150 optical observations
  33. GRB 120729A: EVLA Observations
  34. GRB 120729A: Early RAPTOR Observations
  35. T100 observations of GRB 120729A
  36. GRB 120728A: GROND Afterglow discovery
  37. GRB 120729A: Swift-XRT refined Analysis
  38. Correction to Swift GCN Circular 13538
  39. GRB 120729A: Swift/UVOT Detection
  40. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  41. GRB 120729A, Swift-BAT refined analysis
  42. GRB 120728A, Swift-BAT refined analysis
  43. GRB 120729A: Enhanced Swift-XRT position
  44. GRB 120728A: Swift/UVOT Upper Limits
  45. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  46. GRB 120729A: Swift detection of a burst with an optical afterglow
  47. GRB 120728A: Swift-XRT refined Analysis
  48. GRB 120728A: Enhanced Swift-XRT position
  49. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  50. GRB 120728A: GROND observations
  51. GRB 120728A: Swift detection of a burst
  52. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  53. Swift Trigger 528925 is probably a noise fluctuation
  54. GRB 120722A: optical upper limit
  55. GRB 120724A: optical observation in Maidanak observatory
  56. GRB 120724A, Swift-BAT refined analysis
  57. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  58. GRB 120724A: Enhanced Swift-XRT position
  59. GRB 120724A: Swift-XRT refined Analysis
  60. GRB 120724A: Swift detection of a burst
  61. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  62. GRB 120722A: Swift/UVOT Upper Limits
  63. GRB 120722A: GROND detection of the afterglow
  64. GRB 120722A: Swift-XRT refined Analysis
  65. GRB 120722A: Swift-BAT refined analysis
  66. GRB 120722A: Enhanced Swift-XRT position
  67. GRB 120722A: Swift detection of a burst
  68. GRB 120716A: EVLA Detection
  69. GRB 120716A: Swift-XRT detection
  70. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  71. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  72. Konus-Wind observation of GRB 120716A
  73. GRB 120714B: Swift/UVOT Detection
  74. GRB 120714B: Swift-XRT refined Analysis
  75. GRB120714A: Swift/UVOT upper limits
  76. GRB 120714B: Swift-BAT refined analysis
  77. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  78. GRB 120714A: GROND upper limits
  79. GRB 120714B: GROND confirmation of fading afterglow
  80. GRB 120714A: Swift-XRT refined Analysis
  81. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  82. GRB 120624B: VLA Observations
  83. GRB 120714B: Position Correction and Candidate Optical Afterglow
  84. GRB 120714A: Swift-BAT refined analysis
  85. GRB 120714B: Swift detection of a burst
  86. GRB 120714A: Enhanced Swift-XRT position
  87. GRB 120712A: Fermi GBM observation
  88. GRB 120711A: INTEGRAL/SPI observations
  89. GRB120714A: UVOT non-detection
  90. GRB 120714A: Swift-XRT observations
  91. GRB 120714A: Swift detection of a burst
  92. IPN Triangulation of GRB 120709A
  93. GRB 120712A: Swift/UVOT Detection
  94. GRB 120712A: Swift-XRT refined Analysis
  95. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  96. GRB 120712A: Enhanced Swift-XRT position
  97. GRB 120712A: Swift-BAT refined analysis
  98. GRB 120712A: Swift detection of a burst with optical afterglow
  99. GRB 120711B: Swift-XRT refined Analysis
  100. GRB 120711A: Fermi LAT Detection

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