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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.

"200205A/SWIFT J0840.7-3516" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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').
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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"

19596 results found.

  1. GRB 090813: Enhanced Swift-XRT position
  2. GRB 090813: Liverpool Telescope afterglow confirmation
  3. GRB 090813: Swift detection of a burst
  4. GRB 090812: WIRO NIR upper limit
  5. GRB 090812: Faulkes Telescope South Continued Optical Monitoring
  6. GRB 090812: RAPTOR detections during the burst
  7. GRB 090812: Swift XRT refined analysis
  8. GRB 090812, RIMOTS optical upper limits
  9. GRB 090812 Swift-BAT Refined Analysis
  10. GRB090812: Swift/UVOT observations
  11. GRB 090812: GROND Observations of the Optical/NIR Afterglow
  12. GRB 090812: Enhanced Swift-XRT position
  13. GRB 090812: Liverpool Telescope afterglow confirmation
  14. GRB 090812: Swift detection of a burst with an optical counterpart
  15. GRB 090809: Swift-XRT refined analysis
  16. GRB090809: Swift/UVOT observations
  17. GRB 090809: Enhanced Swift-XRT position
  18. GRB 090809: Swift-BAT refined analysis
  19. GRB 090809: Swift detection of a burst with a possible optical counterpart
  20. GRB 090807: Liverpool Telescope observations
  21. GRB 090807: Swift/UVOT Upper Limits
  22. GRB 090807: Swift-XRT refined analysis
  23. GRB 090807, Swift-BAT refined analysis
  24. GRB 090807: Enhanced Swift-XRT position
  25. GRB 090807, RIMOTS optical upper limits
  26. GRB 090807: Swift detection of a burst
  27. GRB 090726: optical observation
  28. Swift-BAT trigger 358760 is most likely not a GRB
  29. Swift trigger 358760 is probably a noise event
  30. GRB 090709A : Quick look analysis of the Suzaku observation
  31. GRB 090728: Swift-BAT refined analysis
  32. GRB 090727: GRT Optical Observation
  33. GRB 090728: Swift XRT refined analysis
  34. GRB 090726: GRT Optical Observation
  35. GRB 090727: Swift/UVOT Upper Limits
  36. GRB 090728: Swift/UVOT Upper Limits
  37. GRB 090728: Enhanced Swift-XRT position
  38. GRB 090728, RIMOTS optical upper limits
  39. GRB 090728A: Faulkes Telescope North Optical Afterglow Candidate
  40. GRB 090728: Swift detection of a burst
  41. GRB 090727: Swift-BAT refined analysis
  42. GRB 090727: Swift-XRT refined analysis
  43. GRB 090727: Liverpool Telescope Afterglow Confirmation and Optical Flare
  44. GRB 090727: Enhanced Swift-XRT position
  45. GRB 090727: Liverpool Telescope possible OT candidate
  46. GRB 090727: Swift detection of a burst
  47. GRB090726: Swift/UVOT observations
  48. GRB 090726, Swift-BAT refined analysis
  49. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  50. GRB 090726: D50 optical observations
  51. GRB 090726: Swift-XRT Team refined analysis
  52. GRB 090726: Enhanced Swift-XRT position
  53. GRB 090726: Swift/UVOT Finding Chart Observation
  54. GRB 090726: Swift-XRT position of probable counterpart
  55. GRB 090726: Swift detection of a burst
  56. Swift Trigger 358354 is not a GRB
  57. GRB 090720: Gemini-North Imaging and Optical Afterglow
  58. Swift XRT and UVOT refned analysis of GRB 090720
  59. GRB 090709A: Swift XRT Timing Analysis
  60. GRB 090715B: VLA radio detection
  61. GRB 090720 Source found in ground processing of Swift-BAT data
  62. GRB 090715A: Suzaku WAM observation of the prompt emission
  63. GRB 090709A - CARMA mm Observations
  64. Konus-Wind observations of short/hard GRB 090715A
  65. GRB 090715B: MASTER optical limit
  66. GRB 090715A: Swift-BAT refined analysis
  67. GRB 090715B: Swift/UVOT followup observations
  68. GRB 090715B: break in the optical afterglow decay
  69. GRB 090715B: Enhanced Swift-XRT position
  70. GRB 090715B: Swift XRT Refined Analysis
  71. GRB 090715B: Swift-BAT refined analysis
  72. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  73. Swift problem fixed
  74. GRB 090715B: Swift detection of a burst with a possible optical counterpart
  75. GRB 090715A: ROTSE-III Optical Limits
  76. GRB 090715: Swift detection of a short hard burst
  77. Swift satellite anomaly
  78. GRB 090712: Fermi GBM observation
  79. GRB 090712: Swift-BAT refined analysis
  80. GRB 090712: Swift detection of a burst
  81. GRB 090621B: MTM-500 optical observations
  82. GRB 090709A: deep optical observation with the 10.4m GTC
  83. GRB 090709A: Suzaku WAM observation of the prompt emission
  84. GRB 090709A: Swift UVOT upper limits
  85. GRB 090709B: Fermi GBM detection
  86. GRB 090709A: confirmation of the periodicity in the SPI-ACS data
  87. GRB 090709A: evidence for a very red afterglow at low z
  88. GRB 090709A: RAPTOR Limits During Gamma-Ray Emission
  89. GRB 090709A: Swift XRT Refined Analysis
  90. GRB 090709B, Swift-BAT refined analysis
  91. GRB 090709A: Swift-BAT refined analysis
  92. GRB090709A: High Energy BAT/XRT Analysis Suggests Low to Moderate Redshift
  93. GRB 090709A: Wyoming Infrared Observatory NIR upper limits
  94. GRB 090709A, RIMOTS optical upper limits
  95. GRB 090709A: Enhanced Swift-XRT position
  96. GRB 090709B: Swift detection of a burst
  97. GRB 090708 : Fermi GBM detection
  98. GRB 090709: Faulkes Telescope North Upper Limits
  99. GRB 090709: PAIRITEL NIR Upper Limits
  100. GRB 090709: ROTSE-III Optical Limits

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