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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"

39458 results found.

  1. GRB 130812A, Swift-BAT refined analysis
  2. GRB 130812A: GROND upper limits
  3. GRB 130812A: Swift-XRT refined Analysis
  4. GRB 130812A: Enhanced Swift-XRT position
  5. GRB 130812A: Swift detection of a burst
  6. GRB130807A: Swift/UVOT observations
  7. GRB 130807A: Swift-XRT refined analysis
  8. GRB 130806A: Swift/UVOT Upper Limits
  9. GRB 130807A, Swift-BAT refined analysis
  10. GRB 130807A: Swift detection of a GRB or Galactic transient
  11. Konus-Wind observation of GRB 130804A
  12. GRB 130623A: GROND detection of the optical/NIR afterglow
  13. GRB 130806A: MITSuME Akeno Optical observation
  14. GRB 130806A: Swift-XRT refined Analysis
  15. GRB 130806A: MITSuME Okayama upper limits
  16. GRB 130806A, Swift-BAT refined analysis
  17. IPN localization of GRB 130804A
  18. GRB130803A: GROND observations
  19. GRB 130806A: Enhanced Swift-XRT position
  20. GRB 130806A: Swift detection of a burst
  21. GRB 130804A; Fermi GBM observation
  22. Trigger 565443: Swift detection of a burst from SGR J1745-29
  23. GRB 130803A: Swift-XRT refined Analysis
  24. GRB 130803A: RATIR Optical and NIR Observations
  25. GRB130803A: GROND detection of possible host
  26. GRB 130803A: Swift/UVOT Upper Limits
  27. GRB 130803A; Fermi GBM observation
  28. GRB 130803A, Swift-BAT refined analysis
  29. GRB 130803A: Enhanced Swift-XRT position
  30. GRB 130803A: Faulkes Telescope South Observations
  31. GRB 130603B: Second epoch of HST WFC/F160W imaging
  32. GRB 130803A: Swift detection of a burst
  33. GRB 130727A: Watcher optical limit
  34. GRB 130722A: RATIR Optical Observations
  35. GRB 130727A: Swift/UVOT Detection
  36. Konus-Wind observation of GRB 130727A
  37. GRB 130727A: Swift-XRT refined Analysis
  38. GRB 130727A: Fermi GBM detection
  39. GRB 130727A: GROND observations
  40. GRB 130727A: Enhanced Swift-XRT position
  41. GRB 130727A: Faulkes Telescope South optical afterglow
  42. GRB 130727A: Swift-BAT refined analysis
  43. GRB 130727A: Swift-XRT observations
  44. GRB 130727A: Swift-XRT and Swift-UVOT prompt observations
  45. GRB 130727A: Swift detection of a burst
  46. GRB 130725B: Swift/UVOT Observations
  47. GRB 130725B: Swift trigger time correction
  48. Fermi Gamma-ray Burst Monitor trigger 396484884 / 130725945 is not a GRB
  49. GRB 130725A: Swift-XRT refined Analysis
  50. GRB 130725B, Swift-BAT refined analysis
  51. GRB 130725B: Swift-XRT refined Analysis
  52. GRB130725B: REM-ROS2 optical observations
  53. GRB 130725B - UVOT-enhanced XRT position
  54. Fermi Gamma-ray Burst Monitor trigger 396533554 / 130726509 is not a GRB
  55. GRB 130725A: Swift/UVOT Upper Limits
  56. GRB 130725A - Faulkes Telescope South Observations
  57. GRB 130725B: GROND Detection of the Optical/NIR Afterglow
  58. GRB 130725A: MITSuME Ishigakijima Optical Observation
  59. GRB 130725B: Swift/UVOT Detection of an Optical Counterpart
  60. GRB 130725A, Swift-BAT refined analysis
  61. GRB 130719A: Skynet/PROMPT observations
  62. GRB 130725B: Swift detection of a burst
  63. Swift Trigger 563980 is GRB 130725A
  64. Fermi Gamma-ray Burst Monitor trigger 396447899 / 130725517 is not a GRB
  65. Swift Trigger 563980 cannot be identified at this time.
  66. GRB 130702A in the Ep,i - Eiso plane
  67. Retraction of GCN Circ. 15020 (GRB 130722C Tiled Swift observations)
  68. Konus-Wind observation of GRB 130722A
  69. GRB 130722A: Swift/UVOT Detection
  70. GRB 130722A: MITSuME Okayama upper limits
  71. GRB 130722C Tiled Swift observations
  72. GRB 130722A: Enhanced Swift-XRT position
  73. GRB 130722A: Swift-XRT refined Analysis
  74. GRB 130722A: Skynet/GORT observations
  75. GRB 130719A, Swift-BAT refined analysis
  76. GRB 130722A: Faulkes Telescope South optical candidate
  77. GRB 130715A: Suzaku WAM observation of the prompt emission
  78. GRB 130722A: Swift detection of a burst
  79. GRB 130719A: Swift detection of a burst
  80. GRB 130716A: Fermi GBM observation
  81. GRB 130716A Swift-BAT Spectral lag analysis
  82. GRB 130702A : Xinglong TNT continue optical observation
  83. GRB 130716A: Gemini-North imaging
  84. GRB 130716A: UVOT Upper Limits
  85. GRB 130716A: Probable short-hard burst with delayed Swift data
  86. GRB 130715A: Fermi GBM detection
  87. GRB 130626A: Retraction of possible X-ray afterglow
  88. GRB 130702A: Maidanak optical observations
  89. GMRT radio detection of GRB 130702A
  90. GRB 130708A: Swift XRT and UVOT Observations
  91. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  92. GRB 130708A: Fermi GBM observation
  93. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  94. GRB 130708A found in ground analysis of Swift-BAT data
  95. GRB 130702A: Maidanak optical observations
  96. GRB 130628A: Suzaku WAM observation of the prompt emission
  97. GRB130702A: NOT observation - the detection of an emerging supernova
  98. GRB 130702A: Continued RATIR Optical and NIR Observations
  99. GRB 130702A: Xinglong TNT optical observation
  100. GRB 130702A: Continued UVOT Observations

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