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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"

37564 results found.

  1. GRB 130608A: ISON-Kislovodsk optical upper limit
  2. GRB 130610A: ISON-NM optical observations
  3. GRB 130610A: Swift/UVOT Observations
  4. GRB 130610A: Fermi GBM Observation
  5. GRB 130609B: Swift/UVOT Observations
  6. Konus-Wind observation of GRB 130609B
  7. GRB 130606B: Swift/UVOT Upper Limit
  8. GRB 130610A: LOAO BVR Observation
  9. GRB 130610A: Swift-XRT refined Analysis
  10. GRB 130609B: Swift-XRT refined Analysis
  11. GRB 130610A: Enhanced Swift-XRT position
  12. GRB 130608A: Further Swift-BAT analysis
  13. GRB 130610A, Swift-BAT refined analysis
  14. GRB 130610A: VLT/UVES redshift
  15. GRB 130609B: Enhanced Swift-XRT position
  16. GRB 130610A: P60 Observations
  17. GRB 130610A: PAIRITEL NIR Afterglow Observations
  18. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  19. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  20. GRB 130610A: Swift detection of a burst with an optical counterpart
  21. GRB 130609B: Swift detection of a burst with an optical counterpart
  22. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  23. GRB 130609A: Fermi GBM observation
  24. GRB 130608A: Swift-XRT refined Analysis
  25. GRB 130609A: Swift-XRT refined Analysis
  26. GRB 130608A: RATIR Optical and NIR Observations
  27. GRB 130609A: Enhanced Swift-XRT position
  28. GRB 130609A, Swift-BAT refined analysis
  29. GRB 130608A: Swift-BAT refined analysis
  30. GRB 130608A: Enhanced Swift-XRT position
  31. GRB 130609A: RATIR Optical and NIR Observations
  32. GRB 130609A: P60 nondetection
  33. GRB 130609A: Swift detection of a burst
  34. GRB 130608A: Swift detection of a burst
  35. GRB 130606A: Continued Skynet/PROMPT observations
  36. GRB 130606A: Continued RATIR Optical and NIR Monitoring
  37. GRB 130606B: AGILE-MCAL observation
  38. GRB 130606B: RATIR Optical and NIR Observations
  39. Swift Trigger 557674 is a probable new Galactic transient
  40. GRB 130606B: Swift-XRT observations
  41. GRB 130606A, Swift-BAT refined analysis
  42. GRB 130606A: TAROT Calern observatory early optical observations
  43. GRB 130606A: EVLA detection
  44. GRB 130606A: VLT/X-shooter redshift confirmation
  45. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  46. GRB 130606A: Swift/UVOT Upper Limits
  47. GRB 130603A: AAO optical observations
  48. GRB 130606A: Swift-XRT refined Analysis
  49. GRB 130606A: Enhanced Swift-XRT position
  50. Konus-Wind observation of GRB 130605A: correction to GCN 14809
  51. Konus-Wind observation of GRB 130605A
  52. Konus-Wind observation of GRB 130606A
  53. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  54. GRB 130606A: AAO optical observations
  55. GRB 130606A: P60 Observations
  56. Konus-Wind observation of GRB 130606B
  57. GRB 130606A: PAIRITEL NIR Afterglow Observations
  58. GRB 130606B; Fermi GBM observation
  59. GRB 130606A: LOAO IZY Observation
  60. GRB 130606A: RATIR r'-band Dropout
  61. GRB 130606A: MMT Spectroscopy
  62. GRB 130606A:T100 observations
  63. GRB 130606A: 10.4m GTC refined redshift z = 5.91
  64. GRB 130606B: Fermi-LAT detection of a bright hard burst
  65. GRB 130606A: Errata Ks magnutide in GCN 14792
  66. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  67. GRB 130606A: Errata of J and Ks magnitudes in GCN 14784
  68. GRB130606A: Montarrenti Observatory afterglow detection
  69. GRB 130606A: 10.4m GTC spectroscopy indicates z = 6.1
  70. Virtual Telescope observations of GRB 130606A
  71. GRB 130605A: Swift-XRT refined Analysis
  72. GRB 130605A: Swift-BAT refined analysis
  73. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  74. GRB 130606A: IRSF NIR Observation
  75. GRB 130606A: NOT afterglow detection
  76. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  77. GRB 130606A: Swift detection of a burst
  78. GRB 130605A: Swift/UVOT Detection
  79. GRB 130604A: Swift-BAT refined analysis
  80. GRB 130605A: Continued Skynet/PROMPT observations
  81. GRB 130605A: TAROT La Silla observatory optical decay
  82. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  83. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  84. GRB 130605A: GROND afterglow candidate
  85. GRB 130605A: Swift detection of a burst
  86. GRB 130603B: rest-frame energetics in gamma-rays
  87. Konus-Wind observation of GRB 130603B
  88. GRB 130603B: MASTER-Net early observations and optical sloap limit
  89. GRB 130603B: AMI-LA 15GHz observations
  90. GRB 130604A: Swift/UVOT Upper Limits
  91. GRB 130604A: Swift-XRT refined Analysis
  92. GRB 130604B: Fermi GBM detection
  93. GRB 130603B: RATIR Optical and NIR Observations
  94. GRB 130604A: Enhanced Swift-XRT position
  95. GRB 130604A: Gemini North Spectroscopy
  96. GRB 130603B: P60 Observations
  97. GRB 130604A: MITSuME Okayama upper limits
  98. GRB130603B: Swift/UVOT detection
  99. GRB 130604A: further ISON-NM optical observation
  100. GRB 130603B: VLT/X-shooter redshift confirmation

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