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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"

43136 results found.

  1. IPN Triangulation of GRB 130610B (long/multipeaked)
  2. GRB 130609B, Further Swift-BAT refined analysis
  3. GRB 130609B: GROND observations
  4. GRB 130609A: Radio Observations (5.8, 22 and 85 GHz)
  5. GRB 130609B, Swift-BAT refined analysis
  6. GRB 130610A: Swift/UVOT Observations
  7. GRB 130610A: Fermi GBM Observation
  8. GRB 130609B: Swift/UVOT Observations
  9. Konus-Wind observation of GRB 130609B
  10. GRB 130606B: Swift/UVOT Upper Limit
  11. GRB 130610A: LOAO BVR Observation
  12. GRB 130610A: Swift-XRT refined Analysis
  13. GRB 130609B: Swift-XRT refined Analysis
  14. GRB 130610A: Enhanced Swift-XRT position
  15. GRB 130608A: Further Swift-BAT analysis
  16. GRB 130610A: VLT/UVES redshift
  17. GRB 130609B: Enhanced Swift-XRT position
  18. GRB 130610A: P60 Observations
  19. GRB 130610A: PAIRITEL NIR Afterglow Observations
  20. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  21. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  22. GRB 130610A: Swift detection of a burst with an optical counterpart
  23. GRB 130609B: Swift detection of a burst with an optical counterpart
  24. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  25. GRB 130609A: Fermi GBM observation
  26. GRB 130608A: Swift-XRT refined Analysis
  27. GRB 130609A: Swift-XRT refined Analysis
  28. GRB 130608A: RATIR Optical and NIR Observations
  29. GRB 130609A: Enhanced Swift-XRT position
  30. GRB 130608A: Swift-BAT refined analysis
  31. GRB 130608A: Enhanced Swift-XRT position
  32. GRB 130609A: RATIR Optical and NIR Observations
  33. GRB 130609A: P60 nondetection
  34. GRB130608A: BOOTES-2/TELMA upper limits
  35. GRB 130609A: Swift detection of a burst
  36. GRB 130608A: Swift detection of a burst
  37. GRB 130606A: Continued Skynet/PROMPT observations
  38. Swift Trigger 557674 was due to an onboard position error
  39. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  40. GRB 130606B: AGILE-MCAL observation
  41. GRB 130606B: RATIR Optical and NIR Observations
  42. Swift Trigger 557674 is a probable new Galactic transient
  43. GRB 130606B: Swift-XRT observations
  44. GRB 130606A, Swift-BAT refined analysis
  45. GRB 130606A: TAROT Calern observatory early optical observations
  46. GRB 130606A: EVLA detection
  47. GRB 130606A: VLT/X-shooter redshift confirmation
  48. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  49. GRB 130606A: Swift/UVOT Upper Limits
  50. GRB 130603A: AAO optical observations
  51. GRB 130606A: Swift-XRT refined Analysis
  52. GRB 130606A: Enhanced Swift-XRT position
  53. Konus-Wind observation of GRB 130605A
  54. Konus-Wind observation of GRB 130606A
  55. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  56. Trigger 557640: Swift detection of burst from SGR J1745-29
  57. GRB 130606A: P60 Observations
  58. Konus-Wind observation of GRB 130606B
  59. GRB 130606A: PAIRITEL NIR Afterglow Observations
  60. GRB 130606B; Fermi GBM observation
  61. GRB 130606A: LOAO IZY Observation
  62. GRB 130606A: RATIR r'-band Dropout
  63. GRB 130606A: MMT Spectroscopy
  64. GRB 130606A:T100 observations
  65. GRB 130606A: 10.4m GTC refined redshift z = 5.91
  66. GRB 130606B: Fermi-LAT detection of a bright hard burst
  67. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  68. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  69. GRB130606A: Montarrenti Observatory afterglow detection
  70. GRB 130606A: 10.4m GTC spectroscopy indicates z = 6.1
  71. Virtual Telescope observations of GRB 130606A
  72. GRB 130605A: Swift-XRT refined Analysis
  73. GRB 130605A: Swift-BAT refined analysis
  74. Swift Trigger 557466 is not astrophysical
  75. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  76. GRB 130606A: IRSF NIR Observation
  77. GRB 130606A: NOT afterglow detection
  78. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  79. GRB 130606A: Swift detection of a burst
  80. GRB 130605A: Swift/UVOT Detection
  81. GRB 130604A: Swift-BAT refined analysis
  82. GRB 130605A: Continued Skynet/PROMPT observations
  83. GRB 130605A: TAROT La Silla observatory optical decay
  84. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  85. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  86. GRB 130605A: GROND afterglow candidate
  87. GRB 130605A: Swift detection of a burst
  88. GRB 130603B: rest-frame energetics in gamma-rays
  89. Konus-Wind observation of GRB 130603B
  90. GRB 130603B: MASTER-Net early observations and optical sloap limit
  91. GRB 130603B: AMI-LA 15GHz observations
  92. GRB 130604A: Swift/UVOT Upper Limits
  93. Swift Trigger 557466 is probably not real.
  94. GRB 130604A: Swift-XRT refined Analysis
  95. GRB 130604B: Fermi GBM detection
  96. GRB 130603B: RATIR Optical and NIR Observations
  97. GRB 130604A: Enhanced Swift-XRT position
  98. GRB 130604A: Gemini North Spectroscopy
  99. GRB 130603B: P60 Observations
  100. GRB 130604A: MITSuME Okayama upper limits

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