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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"

37585 results found.

  1. GRB 130612A: TAROT La Silla observatory optical observations
  2. GRB 130612A: VLT/X-shooter redshift
  3. GRB 130612A: RATIR Optical Observations
  4. GRB 130612A: P60 Observations
  5. GRB 130612A: NOT optical observations
  6. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  7. GRB 130612A: PAIRITEL NIR Afterglow Observations
  8. GRB 130612A: Liverpool Telescope Afterglow detection
  9. GRB 130612A: Swift detection of a burst with an optical counterpart
  10. Recent Fermi GBM particle triggers misclassified as GRBs
  11. Konus-Wind observation of GRB 130610B
  12. GRB 130609A: Swift/UVOT Upper Limits
  13. GRB 130608A: Swift/UVOT Upper Limits
  14. GRB 130609B: Fermi GBM observation
  15. IPN Triangulation of GRB 130610B (long/multipeaked)
  16. GRB 130609B, Further Swift-BAT refined analysis
  17. GRB 130609B: GROND observations
  18. GMRT radio observation of GRB 130603B
  19. GRB 130606A: CrAO optical upper limit
  20. GRB 130609A: Radio Observations (5.8, 22 and 85 GHz)
  21. GRB 130609B, Swift-BAT refined analysis
  22. GRB 130608A: ISON-Kislovodsk optical upper limit
  23. GRB 130610A: ISON-NM optical observations
  24. GRB 130610A: Swift/UVOT Observations
  25. GRB 130610A: Fermi GBM Observation
  26. GRB 130609B: Swift/UVOT Observations
  27. Konus-Wind observation of GRB 130609B
  28. GRB 130606B: Swift/UVOT Upper Limit
  29. GRB 130610A: LOAO BVR Observation
  30. GRB 130610A: Swift-XRT refined Analysis
  31. GRB 130609B: Swift-XRT refined Analysis
  32. GRB 130610A: Enhanced Swift-XRT position
  33. GRB 130608A: Further Swift-BAT analysis
  34. GRB 130610A, Swift-BAT refined analysis
  35. GRB 130610A: VLT/UVES redshift
  36. GRB 130609B: Enhanced Swift-XRT position
  37. GRB 130610A: P60 Observations
  38. GRB 130610A: PAIRITEL NIR Afterglow Observations
  39. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  40. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  41. GRB 130610A: Swift detection of a burst with an optical counterpart
  42. GRB 130609B: Swift detection of a burst with an optical counterpart
  43. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  44. GRB 130609A: Fermi GBM observation
  45. GRB 130608A: Swift-XRT refined Analysis
  46. GRB 130609A: Swift-XRT refined Analysis
  47. GRB 130608A: RATIR Optical and NIR Observations
  48. GRB 130609A: Enhanced Swift-XRT position
  49. GRB 130609A, Swift-BAT refined analysis
  50. GRB 130608A: Swift-BAT refined analysis
  51. GRB 130608A: Enhanced Swift-XRT position
  52. GRB 130609A: RATIR Optical and NIR Observations
  53. GRB 130609A: P60 nondetection
  54. GRB 130609A: Swift detection of a burst
  55. GRB 130608A: Swift detection of a burst
  56. GRB 130606A: Continued Skynet/PROMPT observations
  57. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  58. GRB 130606B: AGILE-MCAL observation
  59. GRB 130606B: RATIR Optical and NIR Observations
  60. Swift Trigger 557674 is a probable new Galactic transient
  61. GRB 130606B: Swift-XRT observations
  62. GRB 130606A, Swift-BAT refined analysis
  63. GRB 130606A: TAROT Calern observatory early optical observations
  64. GRB 130606A: EVLA detection
  65. GRB 130606A: VLT/X-shooter redshift confirmation
  66. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  67. GRB 130606A: Swift/UVOT Upper Limits
  68. GRB 130603A: AAO optical observations
  69. GRB 130606A: Swift-XRT refined Analysis
  70. GRB 130606A: Enhanced Swift-XRT position
  71. Konus-Wind observation of GRB 130605A: correction to GCN 14809
  72. Konus-Wind observation of GRB 130605A
  73. Konus-Wind observation of GRB 130606A
  74. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  75. GRB 130606A: AAO optical observations
  76. GRB 130606A: P60 Observations
  77. Konus-Wind observation of GRB 130606B
  78. GRB 130606A: PAIRITEL NIR Afterglow Observations
  79. GRB 130606B; Fermi GBM observation
  80. GRB 130606A: LOAO IZY Observation
  81. GRB 130606A: RATIR r'-band Dropout
  82. GRB 130606A: MMT Spectroscopy
  83. GRB 130606A:T100 observations
  84. GRB 130606A: 10.4m GTC refined redshift z = 5.91
  85. GRB 130606B: Fermi-LAT detection of a bright hard burst
  86. GRB 130606A: Errata Ks magnutide in GCN 14792
  87. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  88. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  89. GRB130606A: Montarrenti Observatory afterglow detection
  90. GRB 130606A: 10.4m GTC spectroscopy indicates z = 6.1
  91. Virtual Telescope observations of GRB 130606A
  92. GRB 130605A: Swift-XRT refined Analysis
  93. GRB 130605A: Swift-BAT refined analysis
  94. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  95. GRB 130606A: IRSF NIR Observation
  96. GRB 130606A: NOT afterglow detection
  97. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  98. GRB 130606A: Swift detection of a burst
  99. GRB 130605A: Swift/UVOT Detection
  100. GRB 130604A: Swift-BAT refined analysis

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