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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"

42007 results found.

  1. GRB 130903A: Swift-XRT observations
  2. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  3. GRB 130903A: ISON-Kislovodsk optical Upper Limits
  4. GRB 130903A: GROND Upper Limits
  5. GRB 130903A: A long GRB detected by INTEGRAL
  6. GRB 130831A: Swift/UVOT Observations
  7. GRB 130831A: Montarrenti Observatory optical follow-up
  8. GRB 130831A: Optical Observations via Virtual Telescope, follow-up
  9. GRB 130831A: RATIR Optical and NIR Observations
  10. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  11. GRB 130831B, Swift-BAT refined analysis
  12. GRB 130831A: VLA Observations
  13. GRB 130831A: T100 observations
  14. GRB 130831B: Swift/UVOT Upper Limits
  15. GRB 130831A: CARMA mm upper limit
  16. GRB 130831B: GROND upper limits
  17. Swift Trigger 569022: a possible GRB
  18. GRB 130831A, Swift-BAT refined analysis
  19. GRB 130831B: Swift-XRT refined Analysis
  20. GRB 130831A: optical observations
  21. GRB 130831A: Optical Observations via Virtual Telescope
  22. GRB 130831A: Swift-XRT refined Analysis
  23. GRB 130831A: Montarrenti Observatory optical observations
  24. GRB 130831A: Skynet/PROMPT-SSO detections
  25. GRB 130831A : Xinglong 60cm optical observation
  26. Konus-Wind observation of GRB 130831A
  27. GRB 130831A: Gemini-North Redshift
  28. GRB 130831A: Weihai optical observations
  29. GRB 130831B: Swift detection of a burst
  30. GRB 130831A: Faulkes Telescope North and South optical afterglow
  31. GRB 130831A: Swift detection of a burst with an optical counterpart
  32. IPN triangulation of GRB 130828A - error box
  33. GRB 130822A: optical upper limits
  34. GRB 130829A: AAO optical observations
  35. GRB 130828A: Swift XRT and UVOT observations
  36. GRB 130829A: NOT optical observations
  37. Correction to GCN 15132 - GRB 130828A
  38. IPN triangulation of GRB 130828A
  39. GRB 130829A: Swift detection of a burst
  40. GRB 130828A Tiled Swift observations
  41. GRB 130828A: Fermi GBM detection
  42. GRB 130828A: Fermi-LAT detection of a burst
  43. IPN triangulation of GRB130821A
  44. GRB 130822A Swift-BAT Spectral lag analysis
  45. Konus-Wind observation of GRB 130821A
  46. GRB 130821A: Weihai optical upper limit
  47. GRB 130821A: Swift-XRT observation
  48. GRB 130822A: 5.8 GHz VLA upper limit
  49. GRB 130822A: Gemini Observations
  50. GRB 130822A: Swift-XRT refined Analysis
  51. GRB 130822A: WHT ACAM observations
  52. GRB 130822A: Swift/UVOT Upper Limits
  53. GRB 130822A, Swift-BAT refined analysis
  54. GRB 130821A: Fermi-LAT detection of a burst
  55. GRB 130822A: Weihai optical upper limit
  56. GRB 130821A: Fermi GBM Detection
  57. GRB 130822A: Swift detection of a short burst
  58. GRB 130816A: Swift/UVOT Upper Limits
  59. GRB 130816B: Swift/UVOT Upper Limits
  60. Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
  61. GRB 130816B, Swift-BAT refined analysis
  62. GRB 130816B: GROND afterglow candidate
  63. GRB 130816A: Swift-XRT refined Analysis
  64. GRB 130816A, Swift-BAT refined analysis
  65. GRB 130816A: Fermi GBM observation
  66. GRB 130816B: Swift-XRT refined Analysis
  67. GRB 130816A: GROND confirmation of afterglow
  68. GRB 130816B: Swift detection of a burst
  69. GRB 130816A: REM NIR candidate afterglow
  70. GRB 130816A: Swift detection of a burst
  71. Refined IPN Triangulation of GRB 130812B
  72. Konus-Wind observation of GRB 130812B
  73. IPN Triangulation of GRB 130812B (long/soft)
  74. GRB 130812A: Swift/UVOT Upper Limits
  75. GRB 130812A, Swift-BAT refined analysis
  76. GRB 130812A: GROND upper limits
  77. GRB 130812A: Swift-XRT refined Analysis
  78. GRB 130812A: Swift detection of a burst
  79. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  80. GRB130807A: Swift/UVOT observations
  81. GRB 130807A: Swift-XRT refined analysis
  82. GRB 130806A: Swift/UVOT Upper Limits
  83. GRB 130807A, Swift-BAT refined analysis
  84. GRB 130807A: Swift detection of a GRB or Galactic transient
  85. Konus-Wind observation of GRB 130804A
  86. GRB 130623A: GROND detection of the optical/NIR afterglow
  87. GRB 130806A: MITSuME Akeno Optical observation
  88. GRB 130806A: Swift-XRT refined Analysis
  89. GRB 130806A: MITSuME Okayama upper limits
  90. GRB 130806A, Swift-BAT refined analysis
  91. IPN localization of GRB 130804A
  92. SGR 1745-29 (Swift trigger 565443), Swift-BAT refined analysis
  93. GRB130803A: GROND observations
  94. GRB 130806A: Swift detection of a burst
  95. GRB 130804A; Fermi GBM observation
  96. Trigger 565443: Swift detection of a burst from SGR J1745-29
  97. GRB 130803A: Swift-XRT refined Analysis
  98. GRB 130803A: RATIR Optical and NIR Observations
  99. GRB130803A: GROND detection of possible host
  100. GRB 130803A: Swift/UVOT Upper Limits

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