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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"

36404 results found.

  1. GRB 130609A: Enhanced Swift-XRT position
  2. GRB 130609A, Swift-BAT refined analysis
  3. GRB 130608A: Swift-BAT refined analysis
  4. GRB 130608A: Enhanced Swift-XRT position
  5. GRB 130609A: RATIR Optical and NIR Observations
  6. GRB 130609A: P60 nondetection
  7. GRB 130609A: Swift detection of a burst
  8. GRB 130608A: Swift detection of a burst
  9. GRB 130606A: Continued Skynet/PROMPT observations
  10. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  11. GRB 130606B: AGILE-MCAL observation
  12. GRB 130606B: RATIR Optical and NIR Observations
  13. Swift Trigger 557674 is a probable new Galactic transient
  14. GRB 130606B: Swift-XRT observations
  15. GRB 130606A, Swift-BAT refined analysis
  16. GRB 130606A: TAROT Calern observatory early optical observations
  17. GRB 130606A: EVLA detection
  18. GRB 130606A: VLT/X-shooter redshift confirmation
  19. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  20. GRB 130606A: Swift/UVOT Upper Limits
  21. GRB 130603A: AAO optical observations
  22. GRB 130606A: Swift-XRT refined Analysis
  23. GRB 130606A: Enhanced Swift-XRT position
  24. Konus-Wind observation of GRB 130605A: correction to GCN 14809
  25. Konus-Wind observation of GRB 130605A
  26. Konus-Wind observation of GRB 130606A
  27. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  28. GRB 130606A: AAO optical observations
  29. GRB 130606A: P60 Observations
  30. Konus-Wind observation of GRB 130606B
  31. GRB 130606A: PAIRITEL NIR Afterglow Observations
  32. GRB 130606B; Fermi GBM observation
  33. GRB 130606A: LOAO IZY Observation
  34. GRB 130606A: RATIR r'-band Dropout
  35. GRB 130606A: MMT Spectroscopy
  36. GRB 130606A:T100 observations
  37. GRB 130606A: 10.4m GTC refined redshift z = 5.91
  38. GRB 130606B: Fermi-LAT detection of a bright hard burst
  39. GRB 130606A: Errata Ks magnutide in GCN 14792
  40. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  41. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  42. GRB130606A: Montarrenti Observatory afterglow detection
  43. GRB 130606A: 10.4m GTC spectroscopy indicates z = 6.1
  44. Virtual Telescope observations of GRB 130606A
  45. GRB 130605A: Swift-XRT refined Analysis
  46. GRB 130605A: Swift-BAT refined analysis
  47. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  48. GRB 130606A: IRSF NIR Observation
  49. GRB 130606A: NOT afterglow detection
  50. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  51. GRB 130606A: Swift detection of a burst
  52. GRB 130605A: Swift/UVOT Detection
  53. GRB 130604A: Swift-BAT refined analysis
  54. GRB 130605A: Continued Skynet/PROMPT observations
  55. GRB 130605A: TAROT La Silla observatory optical decay
  56. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  57. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  58. GRB 130605A: GROND afterglow candidate
  59. GRB 130605A: Swift detection of a burst
  60. GRB 130603B: rest-frame energetics in gamma-rays
  61. Konus-Wind observation of GRB 130603B
  62. GRB 130603B: MASTER-Net early observations and optical sloap limit
  63. GRB 130603B: AMI-LA 15GHz observations
  64. GRB 130604A: Swift/UVOT Upper Limits
  65. GRB 130604A: Swift-XRT refined Analysis
  66. GRB 130604B: Fermi GBM detection
  67. GRB 130603B: RATIR Optical and NIR Observations
  68. GRB 130604A: Enhanced Swift-XRT position
  69. GRB 130604A: Gemini North Spectroscopy
  70. GRB 130603B: P60 Observations
  71. GRB 130604A: MITSuME Okayama upper limits
  72. GRB130603B: Swift/UVOT detection
  73. GRB 130604A: further ISON-NM optical observation
  74. GRB 130603B: VLT/X-shooter redshift confirmation
  75. GRB 130604A: ISON-NM optical upper limit
  76. GRB 130603A: MITSuME Akeno Optical observation
  77. GRB 130604A: KAIT optical upper limit
  78. GRB 130604A: P60 optical afterglow candidate
  79. GRB 130604A: Swift detection of a burst
  80. GRB 130603B: 5.8 GHz VLA detection
  81. GRB 130603A: SON optical observations
  82. GRB 130603B: Swift-XRT refined Analysis
  83. GRB 130603B: Gemini Observations
  84. GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
  85. GRB 130603B: Swift-BAT Spectral lag analysis
  86. GRB 130603B: Magellan redshift confirmation
  87. GRB 130603B: Short GRB afterglow spectrum from GTC
  88. GRB 130603B: Afterglow detection from NOT
  89. GRB 130603B: WHT optical afterglow candidate
  90. GRB 130603B: Swift-BAT refined analysis
  91. GRB 130603A: Swift-XRT refined Analysis
  92. GRB 130603B: Enhanced Swift-XRT position
  93. Swift/UVOT observations of GRB130603A
  94. GRB 130603A: Enhanced Swift-XRT position
  95. GRB 130603A: Swift-BAT refined analysis
  96. GRB 130603B: Swift detection of a bright short burst
  97. GRB 130603A: MITSuME Okayama Optical Observation
  98. GRB 130603A: Swift-XRT observations
  99. GRB 130603A: Swift-XRT and Swift-UVOT detections
  100. GRB 130603A: Swift detection of a burst

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