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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"

36010 results found.

  1. GRB 070810: Swift-XRT Team Refined Analysis
  2. GRB 070809: Swift-XRT refined analysis
  3. GRB 070810: enhanced Swift-XRT position
  4. GRB 070810: Swift/UVOT Optical Counterpart
  5. GRB 070810: ROTSE-III Detection of Optical Counterpart
  6. GRB 070810: Swift detection of a burst
  7. GRB 070809, Swift-BAT refined analysis
  8. GRB 070809: Optical Pre-imaging from Palomar
  9. GRB 070808: Swift/UVOT upper limits
  10. GRB 070809: ROTSE-III Optical Limits
  11. GRB 070809: Swift detection of a short burst
  12. GRB 070808 : Faulkes Telescope South Observations
  13. GRB 070808: Swift XRT refined analysis
  14. GRB 070808, Swift-BAT refined analysis
  15. GRB 070808: OPTIMA-Burst optical upper limit
  16. GRB 070808: Xinglong TNT optical Upper Limit
  17. GRB070808: Optical observations with KANATA
  18. GRB070808 - SDSS Pre-Burst Observations
  19. GRB 070808: ROTSE-III Optical Limits
  20. GRB 070808: Swift detection of a burst
  21. GRB061121A: PROMPT Observations
  22. GRB070805 XRT and UVOT afterglow candidate
  23. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  24. GRB070612A: Radio upper limit from GMRT
  25. GRB 070721B: correct afterglow position
  26. GRB 070805, Swift-BAT refined analysis
  27. GRB 070805: Swift XRT initial analysis.
  28. GRB 070805: Swift/UVOT initial analysis
  29. GRB 070805: Swift detection of a burst
  30. VLA non-detection of GRB 070721B
  31. GRB 070802: REM optical observations
  32. GRB 070724B: Swift-XRT afterglow confirmation
  33. GRB 070802: Swift-XRT refined analysis
  34. GRB 070802: Confirmation of the optical afterglow
  35. GRB 070802, Swift-BAT refined analysis
  36. GRB 070802: VLT redshift
  37. GRB 070802: refined Swift XRT position
  38. GRB 070802: V-band detection of the candidate afterglow
  39. GRB 070802: LCO I-band candidate
  40. GRB 070802: GROND J band candidate
  41. GRB 070802: LCO optical observations
  42. GRB 070802: Swift detection of a burst
  43. GRB 070731, Swift-BAT refined analysis
  44. Konus-A observation of GRB 070729
  45. Swift/UVOT detection of GRB070714B
  46. GRB 070724B: pseudo-z ~ 1.10 from prompt emission spectrum
  47. GRB 070729: LCO optical imaging
  48. VLA upper limit on short hard burst GRB 070714B
  49. Intense burst from SGR 1806-20 detected on July 27
  50. GRB 070729: Swift-XRT refined analysis
  51. GRB 070729, Swift-BAT refined analysis
  52. GRB 070729: Magellan NIR Observations
  53. GRB 070724B: P60 Observations
  54. GRB 070729: Swift detection of a short hard burst
  55. GRB 070724B: Swift/UVOT Upper limits
  56. GRB 070724B: Swift-XRT afterglow likely candidate
  57. GRB 070721A: optical observations
  58. GRB 070724A: further VLT observations
  59. GRB 070724B: Suzaku WAM observation of the prompt emission
  60. Konus-Wind observation of GRB 070724B
  61. GRB 070724B: Analysis of AGILE gamma-ray data
  62. GRB 070724B: Swift-XRT afterglow candidates
  63. GRB 070724b: First Gamma Ray Burst Localization by SuperAGILE onboard
  64. Four radio sources in Swift-XRT error box of GRB 070724
  65. GRB 070724: optical observations
  66. GRB 070724: P60 and Gemini Observations
  67. GRB 060814 - Keck host detection and redshift
  68. GRB 070724: IR observations
  69. GRB 070724: Closer association with DSS source
  70. GRB 070724: Swift-XRT Team refined analysis
  71. GRB 070724: Pre-Imaging Shows a Source in the XRT Error Circle
  72. Short-Hard GRB070714B: PROMPT Observations
  73. GRB 070724, Swift-BAT refined analysis of a short burst
  74. GRB 070721B: further observations and analysis
  75. GRB 070724: Swift detection of a burst
  76. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  77. GRB 070714B: Keck observations
  78. GRB 070721B: optical observations and proposed redshift
  79. GRB 070721B, Further Swift-BAT refined analysis
  80. Swift/UVOT Observations of GRB070721A
  81. GRB 070721B : Faulkes Telescope South observations
  82. GRB 070721B: Swift-XRT refined analysis
  83. GRB 070721A : Faulkes Telescope South optical limit
  84. GRB 070721A: Swift/XRT refined analysis
  85. GRB 070721B, Swift-BAT refined analysis
  86. GRB 070721A, Swift-BAT refined analysis
  87. GRB070721B: A bright UVOT candidate
  88. GRB 070721B: Swift detection of a burst
  89. GRB 070721: Swift detection of a possible burst
  90. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  91. GRB 070714B : Suzaku WAM observation of the prompt emission
  92. GRB 070714A: Swift-BAT T_zero
  93. Erratum : Suzaku WAM observation of GRB 070704
  94. GRB 070714A: Swift/UVOT Upper limits
  95. GRB 070714B: Swift/UVOT Upper Limits
  96. GRB 070714B: Swift-BAT spectral lag for the SHB
  97. GRB 070714B: confirmation of optical afterglow
  98. GRB 070616: No Evidence for I Band Afterglow
  99. GRB 070714A: Swift XRT refined analysis
  100. GRB070714B: Swift-XRT refined analysis

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