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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"

27924 results found.

  1. GRB 120514A: Swift-XRT refined Analysis
  2. GRB 120514A: Enhanced Swift-XRT position
  3. GRB 120514A: Swift-BAT refined analysis
  4. GRB 120514A: TAROT Calern observatory optical observations
  5. GRB 120514A: Swift detection of a burst
  6. Fermi Trigger 358364818: BOOTES-4 observations
  7. GRB 120510A: Swift XRT and UVOT observations
  8. GRB 120510A: MAXI/GSC detection of a burst
  9. GRB 120422A: SN identification from GTC
  10. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  11. GRB 120422A: P200 NIR detection
  12. GRB 120422A: Gemini-N detection of a supernova
  13. GRB 120422A: i-band re-brightening and possible SN detection
  14. Swift detection of 4U 1630-47
  15. IPN Triangulation of bright GRB 120426A
  16. Swift Trigger 520928 is a noise event
  17. Swift Trigger 520928 is probably not a burst
  18. GRB 120424A: MAXI/GSC detection of a burst
  19. GRB 120422A: RAPTOR Limits During Gamma-ray Emitting Interval
  20. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  21. GRB 120422A GROND observations
  22. GRB 120422A: EVLA Detection
  23. GRB 120422A: Gemini redshift of candidate host
  24. GRB 120422A: Zadko observatory - Gingin optical observations
  25. GRB 120422A: Swift-XRT refined Analysis
  26. GRB 120422A: A Swift/UVOT Detection
  27. GRB 120422A: Enhanced Swift-XRT position
  28. GRB 120422A: Swift-BAT refined analysis
  29. GRB 120422A: Swift detection of a burst
  30. GRB 120419A: Swift-XRT and UVOT observations
  31. Swift Trigger 519874 is a noise event
  32. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  33. Swift Trigger 519874 is probably a noise event
  34. Trigger 519868: Swift detection of SGR1806-20
  35. GRB 120404A: optical observations in Mondy observatory
  36. GRB 120404A: optical observations
  37. GRB 120404A, Optical Observations
  38. GRB 120404A: EVLA Detection
  39. GRB120404A: GROND observations show steeply decaying afterglow
  40. GRB120404A: MOA optical observations of the initial rise afterglow
  41. GRB 120404A: VLT/X-shooter redshift confirmation
  42. GRB 120404A: Swift/UVOT Detection
  43. GRB 120403B: Swift-XRT refined Analysis
  44. GRB 120404A: Swift-XRT refined Analysis
  45. GRB 120404A: Swift-BAT refined analysis
  46. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  47. GRB 120404A: Enhanced Swift-XRT position
  48. GRB 120403B: TAROT La Silla observatory optical observations
  49. GRB 120403B: Fermi GBM Observation
  50. GRB 120404A: MASTER early OT limit
  51. GRB 120404A: Faulkes Telescope North afterglow confirmation
  52. GRB 120404A: Swift detection of a burst with an optical counterpart
  53. GRB 120403B: Swift-BAT refined analysis
  54. GRB 120403B: Swift/UVOT Upper Limits
  55. GRB 120403B: Enhanced Swift-XRT position
  56. GRB 120403A: Swift/BAT spectral lag analysis
  57. GRB 120403B: Swift detection of a burst
  58. BAT trigger 519207 was a burst from Cyg X-1, was not GRB 120402A
  59. GRB 120402A: optical upper limit
  60. GRB 120320A: optical upper limit in Mondy observatory
  61. GRB 120320A: early optical upper limit
  62. GRB 120403A: MASTER follow up observations
  63. GRB 120402A: MASTER follow up observations
  64. GRB 120403A, Swift-BAT refined analysis
  65. GRB 120402B: Fermi GBM detection
  66. GRB 120328B: Pi of the Sky simultaneous upper limits
  67. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  68. GRB 120403A: Swift detection of a burst
  69. GRB 120402A: Swift detection of a possible burst or noise
  70. GRB 120326A: Cima Rest and Bassano Brescia
  71. GRB 120401A: Swift-XRT refined Analysis
  72. GRB 120401A: Swift-BAT refined analysis
  73. GRB 120401A: Enhanced Swift-XRT position
  74. GRB 120401A: Prompt enhanced Swift-XRT position
  75. GRB 120401A: Swift detection of a burst
  76. GRB 120326A: EVLA Observations
  77. GRB120327A - ATCA radio afterglow detection at 34GHz
  78. GRB 120324A: CrAO optical upper limit
  79. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  80. GRB 120326A : Suzaku WAM observation of the prompt emission
  81. GRB 120326A: CARMA 3mm detection
  82. Swift trigger 518853 is most likely GX 301-2
  83. GRB 120326A: Bassano Bresciano Observatory optical observations
  84. Swift trigger 518853: MASTER-ICATE possible OT
  85. The Swift-XRT source associated with trigger 518853 is a cosmic ray
  86. Trigger 518853: Swift detection of a probable Galactic transient
  87. GRB 120327A: Zadko optical observations
  88. GRB 120328B: Fermi GBM detection
  89. long/intense GRB 120328B: MASTER follow up observations
  90. GRB 120328A: Swift/UVOT Upper Limits
  91. GRB 120328A: Swift-XRT refined Analysis
  92. IPN Triangulation of GRB 120328B (long/intense)
  93. GRB 120328A: Swift-BAT refined analysis
  94. GRB 120328A: Enhanced Swift-XRT position
  95. GRB 120328A: TAROT La Silla observatory optical observations
  96. Skynet/PROMPT observations of GRB120328A
  97. GRB 120328A: Swift detection of a burst
  98. GRB 120327A: GTC redshift confirmation
  99. GRB 120326A: Fermi GBM Observation
  100. GRB 120327A afterglow detection

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