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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

24400 results found.

  1. GRB 090424: Suzaku WAM observation of the prompt emission
  2. GRB 090426: VLT spectroscopy
  3. GRB 090426: Swift-BAT refined analysis
  4. GRB 090426: Swift-XRT refined analysis
  5. GRB 090423: GROND second epoch imaging and refined SED
  6. GRB 090424: MASTER-Net prompt optical limit
  7. GRB090423: Y-band limit
  8. GRB 090423: Swift/BAT spectral lag results
  9. GRB 090424 optical observations
  10. GRB 090424: Swift-XRT refined analysis
  11. GRB 090424: MASTER-Net prompt optical observations
  12. GRB 090424: Swift-BAT refined analysis
  13. GRB 090424: Fermi GBM Observation
  14. GRB 090423: Fermi GBM observation
  15. GRB 090422: Fermi GBM observation
  16. GRB 090423: NOT z-band limit
  17. GRB090418A Rc-band photometry
  18. GRB090423, RIMOTS optical upper limits
  19. GRB 090423: Swift-BAT refined analysis
  20. GRB 090423: Faulkes Telescope South observations
  21. GRB 090418A: R and I band observation
  22. GRB 090418A: Konus-Wind and Swift/BAT joint spectral analysis
  23. GRB 090422: Swift-BAT refined analysis
  24. GRB 090422: Liverpool Telescope observations
  25. GRB 090418B: Suzaku WAM observation of the prompt emission
  26. GRB 090418C: Fermi GBM Detection
  27. GRB 090418A: Swift/UVOT Detection of the Neighbouring Galaxy
  28. Swift-BAT trigger 349718 is not a burst
  29. GRB 090417B: Optical observation
  30. GRB 090418B: Faulkes Telescope North observations
  31. Konus-Wind observation of GRB 090418B
  32. GRB 090419: Swift-BAT refined analysis
  33. GRB 090418B: Detection of a bright burst from Swift-BAT slew data
  34. GRB 090418: Swift-BAT refined analysis
  35. GRB 090418: ROTSE-III Confirmation of Optical Counterpart
  36. GRB 090411B: Suzaku WAM observation of the prompt emission
  37. GRB 090411A: Suzaku WAM observation of the prompt emission
  38. GRB 090417B: optical observations
  39. GRB090417B: optical observations
  40. GRB 090417B: Swift-BAT refined analysis
  41. GRB 090417A: Swift-BAT refined analysis
  42. GRB 090417A: Early-type nature of the putative host
  43. GRB 090417: 2MASS galaxy within BAT Localization
  44. GRB 090411B: Fermi GBM detection
  45. GRB 090411A: Fermi GBM detection
  46. GRB 090410: Suzaku WAM observation of the prompt emission
  47. GRB 090410: Swift-BAT refined analysis
  48. Konus-Wind and Konus-RF observations of GRB 090408b
  49. GRB090408 : TAOS optical observations
  50. GRB 090409: Fermi GBM detection
  51. GRB 090408: Xinglong TNT optical Upper Limit
  52. Swift-BAT trigger 348781: almost certainly not a burst
  53. GRB 090408B: MASTER II-Kourovka optical observations
  54. GRB 090408: Swift detection of a burst
  55. GRB 090407: GROND upper limits
  56. GRB 090407: VLT observations
  57. GRB 090407: Swift-XRT refined analysis
  58. GRB 090407: Swift-BAT refined analysis
  59. Konus-Wind and Konus-RF observations of GRB 090406
  60. GRB 090407: ROTSE-III Optical Limits
  61. GRB 090405: Fermi GBM Detection
  62. GRB 090403: Fermi GBM detection
  63. GRB 090404: GROND upper limits
  64. GRB 090404: optical observations at BOOTES-3 and 1.5-m OSN
  65. GRB 090404: Xinglong TNT optical Upper Limit
  66. GRB 090404: Swift-BAT refined analysis
  67. GRB 090401A: Suzaku WAM observation of the prompt emission
  68. GRB 090401B: Suzaku WAM observation of the prompt emission
  69. Konus-Wind observation of GRB 090401B
  70. GRB 090401B: Xinglong TNT optical Upper Limit
  71. GRB090401B, RIMOTS optical upper limits
  72. GRB 090328: Fermi-LAT refined analysis
  73. GRB 090401B: AGILE refined analysis
  74. GRB 090331: Fermi GBM detection
  75. GRB 090401B: Swift-BAT refined analysis
  76. GRB 090328B: MASTER-Irkutsk prompt optical short burst observations
  77. GRB 090401, Swift-BAT refined analysis
  78. GRB 090323: Further TLS detections - a break?
  79. GRB 090324: Suzaku WAM observation of the prompt emission
  80. GRB 090326: Fermi GBM detection
  81. GRB 090328: BOOTES-3 optical observations
  82. GRB 090328: Fermi GBM Spectral Analysis
  83. GRB 090328B: Fermi GBM Detection
  84. GRB 090330: Fermi GBM detection
  85. Konus-Wind observation of GRB 090328
  86. GRB 090328: IPN Triangulation
  87. GRB 090328: Possible Swift/XRT detection
  88. Fermi LAT and GBM detections of GRB090328
  89. GRB 090323: Additional Lick observations
  90. GRB 090323: TLS detection at 5 days, no break
  91. GRB 090327: Fermi GBM detection
  92. GRB 090320B: MASTER-Net prompt optical observations
  93. GRB 090323: Lick observations
  94. GRB 090323: Fermi GBM Spectral Analysis
  95. GRB 090323: Optical observation of xinglong TNT
  96. GRB 090323 TLS detection - still bright
  97. GRB 090323: Swift-XRT refined analysis
  98. Konus-Wind observation of GRB 090323
  99. GRB 090324: SuperAGILE Localization of a Long GRB
  100. GRB 090323: GROND Detection of the Afterglow and Photo-z

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