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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"

32734 results found.

  1. GRB090323: Optical observations from NOT
  2. Konus-Wind observation of GRB 090328
  3. GRB 090328: IPN Triangulation
  4. GRB 090328: Swift UVOT observations
  5. GRB 090323: WSRT Radio Detection
  6. GRB 090328: Possible Swift/XRT detection
  7. GRB 090323: Radio afterglow detection
  8. GRB 090323: Additional Lick observations
  9. GRB 090323: TLS detection at 5 days, no break
  10. GRB 090323: Faulkes Telescope South Observations
  11. GRB 090320B: MASTER-Net prompt optical observations
  12. GRB 090323: RTT150 optical observations
  13. GRB 090323: Lick observations
  14. GRB 090323: Fermi GBM Spectral Analysis
  15. GRB 090323: Optical observation of xinglong TNT
  16. GRB 090323 TLS detection - still bright
  17. GRB 090323: UVOT Detection of Afterglow
  18. GRB 090323: Swift-XRT refined analysis
  19. Konus-Wind observation of GRB 090323
  20. GRB 090323 Gemini-South Redshift
  21. GRB 090323: P60 Afterglow Confirmation
  22. GRB 090323: GROND Detection of the Afterglow and Photo-z
  23. SGR J1550-5418: two Fermi GBM triggers on March 22
  24. GRB 090323: Possible XRT Counterpart
  25. IPN triangulation of GRB090323
  26. Further 15GHz observations of GRB090313
  27. GRB 090313: WSRT Radio Detection
  28. X-shooter observations of GRB 090313
  29. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  30. GRB 090315: Suzaku WAM observation of the prompt emission
  31. GRB 090313: VLT spectroscopy
  32. GRB090313: radio detection with the VLA
  33. Konus-Wind observation of GRB 090315
  34. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  35. GRB 090313, SMARTS optical/IR observations
  36. Further Swift/UVOT observations of GRB 090313
  37. GRB 090313: detection with CARMA in 3mm band
  38. GRB090305B: MASTER-net prompt optical short burst observations
  39. Radio detection of GRB090313
  40. GRB 090313: MITSuME Okayama observation
  41. GRB 090313: Additional Gemini-S photometry
  42. GRB 090313: WSRT Radio Observations
  43. GRB 090313: Gemini-S photometry
  44. GRB 090313: Zadko Telescope observations
  45. GRB 090313 - PAIRITEL NIR detections
  46. GRB 090313: Gemini-S redshift
  47. GRB 090313 optical observations
  48. GRB 090313: Ongoing plateau phase
  49. GRB 090313: Swift-XRT refined analysis
  50. GRB 090313: Swift/UVOT upper limits
  51. GRB 090313: Faulkes Telescope North observations
  52. GRB 090313: Sustained optical brightness (correction)
  53. GRB 090306B: Confirmation of the X-ray afterglow
  54. GRB 090313: Swift-BAT refined analysis
  55. GRB 090313: Sustained optical brightness
  56. GRB 090313: SDSS object underlying the optical afterglow position
  57. GRB 090313, GROND observations
  58. GRB 090309, Swift-BAT lag analysis
  59. GRB 090205: Zadko Telescope late-time observations
  60. GRB 090309A: GROND upper limits
  61. GRB 090309: Swift/UVOT Upper Limits
  62. GRB 090309: Swift-XRT refined analysis
  63. GRB 090306B: INTEGRAL SPI-ACS light curve
  64. GRB 090309, Swift-BAT refined analysis
  65. GRB 090308: GROND observations
  66. GRB 090308: Gemini GMOS Observations
  67. GRB 090308: Swift/UVOT Upper Limits
  68. GRB 090307: GROND Upper Limits
  69. GRB 090306B: GROND Upper Limits
  70. GRB 090305C: Suzaku WAM observation of the prompt emission
  71. GRB 090308: Swift-XRT refined analysis
  72. Radio observation of GRB 090201 with ATCA
  73. Radio observation of GRB 090117 with ATCA
  74. Radio observation of GRB 081226b with ATCA
  75. Radio observation of GRB 081226a with ATCA
  76. Radio observation of GRB 081007 with ATCA
  77. ATCA observation of SGR J1550-5418
  78. GRB 090308: Swift-BAT refined analysis
  79. GRB 090306B: Possible XRT afterglow
  80. GRB 090307: Swift-XRT afterglow confirmation and analysis
  81. GRB 090307: Swift-BAT refined analysis of trigger 345551
  82. Swift Trigger 345551 is probably not a GRB
  83. GRB 090305: Swift/UVOT Upper Limits
  84. GRB 090305: Swift-XRT refined analysis
  85. GRB 090305, Swift-BAT refined analysis
  86. GRB 090227A: Suzaku WAM observation of the prompt emission
  87. GRB 090305: Magellan confirmation of the optical afterglow
  88. GRB090305: GMOS-S Candidate Optical Afterglow
  89. GRB 090301A: Suzaku WAM observation of the prompt emission
  90. Konus-RF catches first GRB and SGR bursts
  91. Konus-Wind observation of bright short GRB 090227B
  92. IPN localization of short bright GRB 090227B
  93. Konus-Wind observation of GRB 090301A
  94. GRB 090301A: Swift-BAT refined analysis
  95. SGR J1550-5418
  96. GRB 081211B: Nearby cluster
  97. GRB 090217: Suzaku WAM observation of the prompt emission
  98. GRB090217: XRT analysis
  99. Konus-Wind observation of GRB 090217
  100. IPN localization of GRB 090217

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