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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"

27419 results found.

  1. Correction to GCN Circular 14682 (GRB 130518B)
  2. GRB 130518B found in ground analysis of Swift-BAT data
  3. GRB 130518A: Confirmation of the X-ray afterglow.
  4. GRB 130518A: P60 Afterglow Observations
  5. GRB 130518A: RATIR Optical and NIR Observations
  6. GRB 130518A: Swift XRT and UVOT possible afterglow
  7. Konus-Wind observation of GRB 130518A
  8. GRB 130518A Swift-BAT position from ground analysis
  9. GRB 130518A: Fermi LAT detection
  10. GRB 130518A: Fermi GBM detection
  11. GRB 130515A: IRSF NIR Observation
  12. GRB 130515A: Further Gemini Observations
  13. Konus-Wind observation of GRB 130515A
  14. GRB 130514B: RATIR Optical and NIR Observations
  15. Fermi GBM trigger 390275038 / 130515072 is not a GRB
  16. GRB 130515A: Fermi GBM detection
  17. GRB 130427A: Skynet detections of a possible supernova
  18. GRB 130515A: Swift-XRT refined Analysis
  19. GRB 130515A: Swift/UVOT Upper Limits
  20. GRB 130514B Swift-BAT observations
  21. GRB 130515A: Swift-BAT refined analysis
  22. GRB 130514B: GROND observations
  23. GRB 130515A: Gemini/GMOS Observations
  24. GRB 130515A: GROND Observations
  25. GRB 130511A: SSO 2.3m observation
  26. GRB 130514B: Swift-XRT Observations
  27. GRB 130515A: Swift detection of a short burst
  28. GRB 130514A: Swift-XRT refined Analysis
  29. GRB 130514A: Skynet/PROMPT/DSO Detections
  30. GRB 130513A: Bassano Bresciano optical upper limit
  31. GRB 130427A: optical observations
  32. GRB 130514A: RATIR Optical and NIR Observations
  33. GRB 130513A: RATIR Optical and NIR Observations
  34. GRB 130513A: Swift/UVOT Upper Limits
  35. GRB 130514A: Swift/UVOT Upper Limits
  36. GRB 130513A: GROND observations
  37. GRB 130514A: Swift-BAT refined analysis
  38. GRB 130513A: Swift-XRT detection of the afterglow.
  39. GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
  40. GRB 130514A: P60 Observations
  41. GRB 130514A: Swift detection of a burst
  42. GRB130511A: SOAO Optical Observation
  43. GRB 130511A: Swift-XRT refined Analysis
  44. GRB 130511A: Kanata/HOWPol optical observation
  45. GRB 130511A, Swift-BAT refined analysis
  46. GRB 130511A: Upper limit by Xinglong TNT optical observation
  47. GRB 130511A: Gemini-North Redshift
  48. GRB 130511A: Swift detection of a burst with an optical counterpart
  49. GRB 130508A: Swift/UVOT Upper Limits
  50. GRB 130508A: RATIR Optical and NIR Observations
  51. GRB 130508A: Refined Swift-XRT analysis: Correction to GCN 14612
  52. GRB 130508A, Swift-BAT refined analysis
  53. Fermi Trigger 130507.091 - Detection of a SGR-like Burst
  54. GRB130508A: BOOTES-3 optical limit
  55. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  56. GRB 130508A: Swift detection of a probable burst
  57. GRB 130505B: Further Swift observations
  58. GRB 130504C: Swift-XRT afterglow confirmation
  59. GRB 130505A: MITSuME Akeno Optical observation
  60. GRB 130427A, Watcher afterglow detection
  61. GRB 130427A: Excess optical emission consistent with an emerging supernova
  62. GRB 130505A: RATIR Optical and NIR Observations
  63. GRB 130505B: Swift Candidate Afterglow
  64. Refined IPN Triangulation of GRB 130502B
  65. GRB 130505A, Swift-BAT refined analysis
  66. GRB 130504C: further Swift-XRT observations
  67. GRB 130504C: Swift-XRT observations
  68. GRB 130504C: Fermi GBM detection
  69. GRB 130502A: optical upper limit
  70. GRB 130505A: Swift-XRT refined Analysis
  71. Konus-Wind observation of GRB 130505A
  72. GRB 130504C: Fermi-LAT detection of a burst
  73. Swift/UVOT observations of GRB130505A
  74. GRB 130505A: Xinglong TNT optical observations
  75. GRB 130505A; Weihai optical observations
  76. GRB 130505A - Gemini-N/GMOS redshift determination
  77. GRB 130505A: MAXI/GSC detection
  78. GRB 130504A: IAC80 optical candidate
  79. GRB 130505A: Swift detection of a burst with optical afterglow
  80. IPN Triangulation of GRB 130504B
  81. GRB 130504B: Fermi GBM detection
  82. GRB 130504A: Bassano Bresciano Observatory optical upper limit
  83. GRB 130504A: Swift/UVOT Upper Limits
  84. GRB 130502B: Swift-XRT refined Analysis
  85. GRB 130504A, Swift-BAT refined analysis
  86. Swift-XRT X-ray afterglow candidate for GRB 130504A (BAT trigger 555096)
  87. GRB 130502B: possible TNG counterpart
  88. Trigger 555096: Swift detection of a possible burst
  89. GRB 130502A: Swift-BAT refined analysis
  90. GRB 130427A: Non-observation of VHE emission with HAWC
  91. GRB 130502A: Swift-XRT refined Analysis
  92. IPN Triangulation of GRB 130502B
  93. GRB 130502A: Fermi GBM detection
  94. GRB 130502B: Swift/UVOT Upper Limits
  95. GRB 130502A: Swift/UVOT Upper Limits
  96. GRB 130502B: P60 Observations
  97. GRB 130502B Swift-XRT observations
  98. GRB 130502A: RATIR Optical and NIR Observations
  99. GRB 130502B: Fermi LAT Detection
  100. GRB 130502A: TNG candidate counterpart

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