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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').
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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"

32509 results found.

  1. Further 15GHz observations of GRB090313
  2. GRB 090313: WSRT Radio Detection
  3. X-shooter observations of GRB 090313
  4. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  5. GRB 090315: Suzaku WAM observation of the prompt emission
  6. GRB 090313: VLT spectroscopy
  7. GRB090313: radio detection with the VLA
  8. Konus-Wind observation of GRB 090315
  9. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  10. GRB 090313, SMARTS optical/IR observations
  11. Further Swift/UVOT observations of GRB 090313
  12. GRB 090313: detection with CARMA in 3mm band
  13. GRB090305B: MASTER-net prompt optical short burst observations
  14. Radio detection of GRB090313
  15. GRB 090313: MITSuME Okayama observation
  16. GRB 090313: Additional Gemini-S photometry
  17. GRB 090313: WSRT Radio Observations
  18. GRB 090313: Gemini-S photometry
  19. GRB 090313: Zadko Telescope observations
  20. GRB 090313 - PAIRITEL NIR detections
  21. GRB 090313: Gemini-S redshift
  22. GRB 090313 optical observations
  23. GRB 090313: Ongoing plateau phase
  24. GRB 090313: Swift-XRT refined analysis
  25. GRB 090313: Swift/UVOT upper limits
  26. GRB 090313: Faulkes Telescope North observations
  27. GRB 090313: Sustained optical brightness (correction)
  28. GRB 090306B: Confirmation of the X-ray afterglow
  29. GRB 090313: Swift-BAT refined analysis
  30. GRB 090313: Sustained optical brightness
  31. GRB 090313: SDSS object underlying the optical afterglow position
  32. GRB 090313, GROND observations
  33. GRB 090309, Swift-BAT lag analysis
  34. GRB 090205: Zadko Telescope late-time observations
  35. GRB 090309A: GROND upper limits
  36. GRB 090309: Swift/UVOT Upper Limits
  37. GRB 090309: Swift-XRT refined analysis
  38. GRB 090306B: INTEGRAL SPI-ACS light curve
  39. GRB 090309, Swift-BAT refined analysis
  40. GRB 090308: GROND observations
  41. GRB 090308: Gemini GMOS Observations
  42. GRB 090308: Swift/UVOT Upper Limits
  43. GRB 090307: GROND Upper Limits
  44. GRB 090306B: GROND Upper Limits
  45. GRB 090305C: Suzaku WAM observation of the prompt emission
  46. GRB 090308: Swift-XRT refined analysis
  47. Radio observation of GRB 090201 with ATCA
  48. Radio observation of GRB 090117 with ATCA
  49. Radio observation of GRB 081226b with ATCA
  50. Radio observation of GRB 081226a with ATCA
  51. Radio observation of GRB 081007 with ATCA
  52. ATCA observation of SGR J1550-5418
  53. GRB 090308: Swift-BAT refined analysis
  54. GRB 090306B: Possible XRT afterglow
  55. GRB 090307: Swift-XRT afterglow confirmation and analysis
  56. GRB 090307: Swift-BAT refined analysis of trigger 345551
  57. Swift Trigger 345551 is probably not a GRB
  58. GRB 090305: Swift/UVOT Upper Limits
  59. GRB 090305: Swift-XRT refined analysis
  60. GRB 090305, Swift-BAT refined analysis
  61. GRB 090227A: Suzaku WAM observation of the prompt emission
  62. GRB 090305: Magellan confirmation of the optical afterglow
  63. GRB090305: GMOS-S Candidate Optical Afterglow
  64. GRB 090301A: Suzaku WAM observation of the prompt emission
  65. Konus-RF catches first GRB and SGR bursts
  66. Konus-Wind observation of bright short GRB 090227B
  67. IPN localization of short bright GRB 090227B
  68. Konus-Wind observation of GRB 090301A
  69. GRB 090301A: Swift-BAT refined analysis
  70. SGR J1550-5418
  71. GRB 081211B: Nearby cluster
  72. GRB 090217: Suzaku WAM observation of the prompt emission
  73. GRB090217: XRT analysis
  74. Konus-Wind observation of GRB 090217
  75. IPN localization of GRB 090217
  76. GRB090217: Fermi-LAT Detection
  77. SGR activity seen by BAT during ICSP Ionospheric Events
  78. Detailed lightcurves of ICSP VLF Observation of SGR/AXP 1E1547.0-5408
  79. VLA radio upper limit on GRB 090205
  80. GRB 090205: VLT optical decay
  81. GRB 090205: Swift/UVOT Upper Limits
  82. GRB 090205: VLT refined redshift
  83. GRB 090205: Swift-XRT refined analysis
  84. GRB 090205: VLT spectroscopic redshift
  85. GRB 090205: GROND observations and photometric redshift estimate
  86. GRB 090205: VLT candidate afterglow
  87. GRB 090205: Swift-BAT refined analysis
  88. GRB 080319B: IceCube upper limit on high-energy neutrino flux
  89. GRB 090131: Suzaku WAM observation of the prompt emission
  90. ICSP VLF observation of the signatures of SGR/AXP 1E1547.0-5408 bursts
  91. GRB 090126A: Swift-XRT afterglow confirmation
  92. Konus-Wind observation of GRB 090201
  93. GRB 090201: Swift-XRT refined analysis
  94. GRB090201: Swift UVOT upper limits
  95. GRB 090201: object inside the enhanced XRT error circle
  96. GRB 090201: VLT NIR observations
  97. GRB 090201: Swift-BAT refined analysis
  98. GRB 090201: VLT afterglow candidate
  99. GRB 090201: Swift-XRT detection of the possible X-ray afterglow
  100. GRB090113: MAGIC telescope GeV observation

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