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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"

32734 results found.

  1. GRB 070724B: Swift-XRT afterglow candidates
  2. Four radio sources in Swift-XRT error box of GRB 070724
  3. GRB 070724: optical observations
  4. GRB070724: Host galaxy redshift
  5. GRB 070724: P60 and Gemini Observations
  6. GRB 060814 - Keck host detection and redshift
  7. GRB 070724: Closer association with DSS source
  8. Swift/UVOT refined analysis of GRB070724
  9. GRB 070724: Swift-XRT Team refined analysis
  10. GRB 070724: Pre-Imaging Shows a Source in the XRT Error Circle
  11. Short-Hard GRB070714B: PROMPT Observations
  12. GRB 070724, Swift-BAT refined analysis of a short burst
  13. GRB 070721B: further observations and analysis
  14. GRB 070714B: Keck observations
  15. GRB 070721B: optical observations and proposed redshift
  16. Swift/UVOT observations of GRB070721B optical afterglow.
  17. GRB 070721B, Further Swift-BAT refined analysis
  18. Swift/UVOT Observations of GRB070721A
  19. GRB 070721B : Faulkes Telescope South observations
  20. GRB 070721B: Swift-XRT refined analysis
  21. GRB 070721A : Faulkes Telescope South optical limit
  22. GRB 070721A: Swift/XRT refined analysis
  23. GRB 070721B, Swift-BAT refined analysis
  24. GRB 070721A, Swift-BAT refined analysis
  25. GRB070721B: A bright UVOT candidate
  26. GRB 070721B: Swift detection of a burst
  27. GRB 070721: Swift detection of a possible burst
  28. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  29. GRB 070714B : Suzaku WAM observation of the prompt emission
  30. GRB070714B: TNG NIR observations
  31. Erratum : Suzaku WAM observation of GRB 070704
  32. GRB 070714A: Swift/UVOT Upper limits
  33. GRB 070714B: Swift/UVOT Upper Limits
  34. GRB 070616: No Evidence for I Band Afterglow
  35. GRB 070714A: Swift XRT refined analysis
  36. GRB070714B: Swift-XRT refined analysis
  37. GRB 070707: Swift-XRT follow-up observations
  38. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  39. GRB 070714 ("Bastille"): Optical Pre-Imaging
  40. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  41. GRB 070714A, Swift-BAT refined analysis
  42. GRB 070714 : Liverpool Telescope optical counterpart ?
  43. GRB 070704: RTT150 optical observations
  44. GRB 070704: Suzaku/WAM observation of the prompt emission
  45. Konus-Wind observation of GRB 070707
  46. GRB 070707: optical afterglow
  47. GRB 070707: object inside XRT error circle
  48. Swift/UVOT Observations of GRB070707
  49. Swift XRT observation of GRB 070707
  50. GRB 070707: VLT observations
  51. GRB 070429B: NIR Observations
  52. GRB070704: FAVOR optical observations
  53. GRB 070704 : Liverpool Telescope Observations
  54. GRB 070611: VLT observations
  55. VLA detection of GRB 070612A in C Band
  56. Konus-Wind observation of GRB 070626
  57. GRB 070704: Swift-XRT refined analysis
  58. Swift/UVOT Observations of GRB070704
  59. GRB 070704, Swift-BAT refined analysis
  60. GRB 070704: Correction to GCN Circ 6594
  61. GRB 070626: Suzaku/WAM observation of the prompt emission
  62. GRB 070628 Swift-UVOT Refined Analysis
  63. GRB 070628: NIR detection of afterglow
  64. GRB 070628, Swift-BAT refined analysis
  65. GRB 070628: TAROT La Silla observatory optical observations
  66. GRB 070628: Swift XRT refined analysis
  67. GRB 070628: Watcher Observations
  68. GRB 070612A: Allen Telescope Array Observations
  69. INTEGRAL burst GRB070615: X-ray continued observations
  70. GRB 070616 : WIDGET simultaneous optical observations
  71. GRB 070616: Suzaku/WAM observation of the prompt emission
  72. GRB 070612A: Second Epoch WSRT Radio Observations
  73. GRB070621: RTT150 optical observations
  74. GRB 070621: VLT optical observations
  75. GRB 070621: Swift/UVOT Upper Limits
  76. Keck Laser Guide Star Adaptive Optics Imaging of GRB 070621
  77. GRB 070621: Swift-BAT refined analysis
  78. GRB070621: Swift XRT refined analysis
  79. GRB 070621: Gemini South optical imaging
  80. Observations of GRB070612A at Calar Alto
  81. GRB 070621: NOT observations
  82. GRB070621: OPTIMA-Burst optical upper limit
  83. GRB 070621: Watcher Observations
  84. GRB 070621: ROTSE-III Prompt Optical Limits
  85. GMRT upper limit of GRB 070610/SWIFT J195509.6+261406 in 610 MHz
  86. GRB 070612A: TNG optical observations
  87. Swift/UVOT detection of GRB070616 optical afterglow.
  88. GRB070612A: Gemini Spectroscopic Redshift
  89. GRB 070612A: NOT observations
  90. GRB070616: Optical Observation by MITSuME Akeno
  91. GRB 070612B: Optical Observation by MITSuME Akeno
  92. GRB070616: Optical Observation by MITSuME Okayama
  93. GRB 070616, Swift-BAT further refined analysis
  94. GRB 070616: Swift XRT refined circular
  95. GRB 070612A: Possible WSRT Radio Detection
  96. Swift/UVOT observations of GRB070616
  97. GRB 070616: TLS observation
  98. Swift XRT observations of the INTEGRAL burst GRB070615: Possible
  99. GRB 070616, Swift-BAT partial refined analysis
  100. GRB 070612B: optical observations

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