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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"

32560 results found.

  1. GRB 090401B: Suzaku WAM observation of the prompt emission
  2. Konus-Wind observation of GRB 090401B
  3. GRB 090401B: Xinglong TNT optical Upper Limit
  4. GRB 090401B: VLA radio upper limit
  5. GRB 090401B: Upper limits of MITSuME optical observation
  6. GRB090401B, RIMOTS optical upper limits
  7. GRB 090401B: NOT optical observations
  8. GRB 090328: Fermi-LAT refined analysis
  9. Swift/UVOT observations of GRB090401B
  10. GRB 090401B: AGILE refined analysis
  11. Swift/UVOT observations of GRB090401B
  12. GRB 090401B: Swift XRT Refined Analysis
  13. Konus-Wind observation of GRB 090401A
  14. AGILE Gamma-ray detection of GRB 090401B
  15. GRB 090401B: Swift-BAT refined analysis
  16. Swift/UVOT detection of GRB090401B
  17. GRB 090328B: MASTER-Irkutsk prompt optical short burst observations
  18. GRB 090401, Swift-BAT refined analysis
  19. GRB 090323: Further TLS detections - a break?
  20. GRB 090324: Suzaku WAM observation of the prompt emission
  21. GRB 090328: Radio afterglow detection
  22. GRB 090328: BOOTES-3 optical observations
  23. GRB 090328: Fermi GBM Spectral Analysis
  24. GRB 090328: GROND Detection of the Optical/NIR Afterglow
  25. GRB 090328: Gemini South Redshift
  26. GRB 090328: Swift XRT refined analysis
  27. GRB090323: Optical observations from NOT
  28. Konus-Wind observation of GRB 090328
  29. GRB 090328: IPN Triangulation
  30. GRB 090328: Swift UVOT observations
  31. GRB 090323: WSRT Radio Detection
  32. GRB 090328: Possible Swift/XRT detection
  33. GRB 090323: Radio afterglow detection
  34. GRB 090323: Additional Lick observations
  35. GRB 090323: TLS detection at 5 days, no break
  36. GRB 090323: Faulkes Telescope South Observations
  37. GRB 090320B: MASTER-Net prompt optical observations
  38. GRB 090323: RTT150 optical observations
  39. GRB 090323: Lick observations
  40. GRB 090323: Fermi GBM Spectral Analysis
  41. GRB 090323: Optical observation of xinglong TNT
  42. GRB 090323 TLS detection - still bright
  43. GRB 090323: UVOT Detection of Afterglow
  44. GRB 090323: Swift-XRT refined analysis
  45. Konus-Wind observation of GRB 090323
  46. GRB 090323 Gemini-South Redshift
  47. GRB 090323: P60 Afterglow Confirmation
  48. GRB 090323: GROND Detection of the Afterglow and Photo-z
  49. SGR J1550-5418: two Fermi GBM triggers on March 22
  50. GRB 090323: Possible XRT Counterpart
  51. IPN triangulation of GRB090323
  52. Further 15GHz observations of GRB090313
  53. GRB 090313: WSRT Radio Detection
  54. X-shooter observations of GRB 090313
  55. A bright burst from AXP 1E 1547.0-5408/SGR J1550-5418
  56. GRB 090315: Suzaku WAM observation of the prompt emission
  57. GRB 090313: VLT spectroscopy
  58. GRB090313: radio detection with the VLA
  59. Konus-Wind observation of GRB 090315
  60. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  61. GRB 090313, SMARTS optical/IR observations
  62. Further Swift/UVOT observations of GRB 090313
  63. GRB 090313: detection with CARMA in 3mm band
  64. GRB090305B: MASTER-net prompt optical short burst observations
  65. Radio detection of GRB090313
  66. GRB 090313: MITSuME Okayama observation
  67. GRB 090313: Additional Gemini-S photometry
  68. GRB 090313: WSRT Radio Observations
  69. GRB 090313: Gemini-S photometry
  70. GRB 090313: Zadko Telescope observations
  71. GRB 090313 - PAIRITEL NIR detections
  72. GRB 090313: Gemini-S redshift
  73. GRB 090313 optical observations
  74. GRB 090313: Ongoing plateau phase
  75. GRB 090313: Swift-XRT refined analysis
  76. GRB 090313: Swift/UVOT upper limits
  77. GRB 090313: Faulkes Telescope North observations
  78. GRB 090313: Sustained optical brightness (correction)
  79. GRB 090306B: Confirmation of the X-ray afterglow
  80. GRB 090313: Swift-BAT refined analysis
  81. GRB 090313: Sustained optical brightness
  82. GRB 090313: SDSS object underlying the optical afterglow position
  83. GRB 090313, GROND observations
  84. GRB 090309, Swift-BAT lag analysis
  85. GRB 090205: Zadko Telescope late-time observations
  86. GRB 090309A: GROND upper limits
  87. GRB 090309: Swift/UVOT Upper Limits
  88. GRB 090309: Swift-XRT refined analysis
  89. GRB 090306B: INTEGRAL SPI-ACS light curve
  90. GRB 090309, Swift-BAT refined analysis
  91. GRB 090308: GROND observations
  92. GRB 090308: Gemini GMOS Observations
  93. GRB 090308: Swift/UVOT Upper Limits
  94. GRB 090307: GROND Upper Limits
  95. GRB 090306B: GROND Upper Limits
  96. GRB 090305C: Suzaku WAM observation of the prompt emission
  97. GRB 090308: Swift-XRT refined analysis
  98. Radio observation of GRB 090201 with ATCA
  99. Radio observation of GRB 090117 with ATCA
  100. Radio observation of GRB 081226b with ATCA

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