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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"

37676 results found.

  1. GRB 070802, Swift-BAT refined analysis
  2. GRB 070802: VLT redshift
  3. GRB 070802: refined Swift XRT position
  4. GRB 070802: V-band detection of the candidate afterglow
  5. GRB 070802: LCO I-band candidate
  6. GRB 070802: GROND J band candidate
  7. GRB 070802: LCO optical observations
  8. GRB 070802: Swift detection of a burst
  9. GRB 070731, Swift-BAT refined analysis
  10. Konus-A observation of GRB 070729
  11. Swift/UVOT detection of GRB070714B
  12. GRB 070724B: pseudo-z ~ 1.10 from prompt emission spectrum
  13. GRB 070729: LCO optical imaging
  14. VLA upper limit on short hard burst GRB 070714B
  15. Intense burst from SGR 1806-20 detected on July 27
  16. GRB 070729: Swift-XRT refined analysis
  17. GRB 070729, Swift-BAT refined analysis
  18. GRB 070729: Magellan NIR Observations
  19. GRB 070724B: P60 Observations
  20. GRB 070729: Swift detection of a short hard burst
  21. GRB 070724B: Swift/UVOT Upper limits
  22. GRB 070724B: Swift-XRT afterglow likely candidate
  23. GRB 070721A: optical observations
  24. GRB 070724A: further VLT observations
  25. GRB 070724B: Suzaku WAM observation of the prompt emission
  26. Konus-Wind observation of GRB 070724B
  27. GRB 070724B: Analysis of AGILE gamma-ray data
  28. GRB 070724B: Swift-XRT afterglow candidates
  29. GRB 070724b: First Gamma Ray Burst Localization by SuperAGILE onboard
  30. Four radio sources in Swift-XRT error box of GRB 070724
  31. GRB 070724: optical observations
  32. GRB 070724: P60 and Gemini Observations
  33. GRB 060814 - Keck host detection and redshift
  34. GRB 070724: IR observations
  35. GRB 070724: Closer association with DSS source
  36. GRB 070724: Swift-XRT Team refined analysis
  37. GRB 070724: Pre-Imaging Shows a Source in the XRT Error Circle
  38. Short-Hard GRB070714B: PROMPT Observations
  39. GRB 070724, Swift-BAT refined analysis of a short burst
  40. GRB 070721B: further observations and analysis
  41. GRB 070724: Swift detection of a burst
  42. GRB 070326: Detection of first burst from BAT Slew Survey (BATSS)
  43. GRB 070714B: Keck observations
  44. GRB 070721B: optical observations and proposed redshift
  45. GRB 070721B, Further Swift-BAT refined analysis
  46. Swift/UVOT Observations of GRB070721A
  47. GRB 070721B : Faulkes Telescope South observations
  48. GRB 070721B: Swift-XRT refined analysis
  49. GRB 070721A : Faulkes Telescope South optical limit
  50. GRB 070721A: Swift/XRT refined analysis
  51. GRB 070721B, Swift-BAT refined analysis
  52. GRB 070721A, Swift-BAT refined analysis
  53. GRB070721B: A bright UVOT candidate
  54. GRB 070721B: Swift detection of a burst
  55. GRB 070721: Swift detection of a possible burst
  56. GRB 070714B: Swift/BAT and Suzaku/WAM joint spectral analysis
  57. GRB 070714B : Suzaku WAM observation of the prompt emission
  58. GRB 070714A: Swift-BAT T_zero
  59. Erratum : Suzaku WAM observation of GRB 070704
  60. GRB 070714A: Swift/UVOT Upper limits
  61. GRB 070714B: Swift/UVOT Upper Limits
  62. GRB 070714B: Swift-BAT spectral lag for the SHB
  63. GRB 070714B: confirmation of optical afterglow
  64. GRB 070616: No Evidence for I Band Afterglow
  65. GRB 070714A: Swift XRT refined analysis
  66. GRB070714B: Swift-XRT refined analysis
  67. GRB 070707: Swift-XRT follow-up observations
  68. GRB 070714b ("Bastille"): Optical Pre-Imaging (Clarification)
  69. GRB 070714 ("Bastille"): Optical Pre-Imaging
  70. GRB 070714B, Swift-BAT refined analysis of the short hard burst
  71. GRB 070714A, Swift-BAT refined analysis
  72. GRB 070714 : Liverpool Telescope optical counterpart ?
  73. GRB 070714: Swift detection of a bright burst, possibly short
  74. Swift detection of a possible burst (Trigger 284850)
  75. SN 2007bg - off-axis GRB?
  76. GRB 070704: RTT150 optical observations
  77. GRB 070704: Suzaku/WAM observation of the prompt emission
  78. Konus-Wind observation of GRB 070707
  79. GRB 070707: optical afterglow
  80. GRB 070707: object inside XRT error circle
  81. Swift XRT observation of GRB 070707
  82. GRB 070707: VLT observations
  83. INTEGRAL GRB 070707 is a short hard burst
  84. INTEGRAL GRB 070707 is a short hard burst
  85. GRB 070707: A long GRB detected by INTEGRAL
  86. GRB 070707: A long GRB detected by INTEGRAL
  87. GRB 070429B: NIR Observations
  88. GRB070704: FAVOR optical observations
  89. GRB 070704 : Liverpool Telescope Observations
  90. GRB 070611: VLT observations
  91. VLA detection of GRB 070612A in C Band
  92. Konus-Wind observation of GRB 070626
  93. GRB 070704: Swift-XRT refined analysis
  94. Swift/UVOT Observations of GRB070704
  95. GRB 070704, Swift-BAT refined analysis
  96. GRB 070704: Correction to GCN Circ 6594
  97. GRB 070704: Swift detection of a burst
  98. GRB 070626: Suzaku/WAM observation of the prompt emission
  99. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  100. GRB 070628 Swift-UVOT Refined Analysis

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