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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"

15370 results found.

  1. GRB130612A OSN I-band observations
  2. GRB 130612A: RATIR Optical Observations
  3. GRB 130612A: PAIRITEL NIR Afterglow Observations
  4. Konus-Wind observation of GRB 130610B
  5. GRB 130609B: Fermi GBM observation
  6. GRB 130609B, Further Swift-BAT refined analysis
  7. GRB 130610A: Swift/UVOT Observations
  8. GRB 130610A: Fermi GBM Observation
  9. Konus-Wind observation of GRB 130609B
  10. GRB 130608A: Further Swift-BAT analysis
  11. GRB 130610A: PAIRITEL NIR Afterglow Observations
  12. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  13. GRB 130606A - Liverpool Telescope and Faulkes Telescope North optical observations
  14. GRB 130609A: Fermi GBM observation
  15. GRB 130609A: P60 nondetection
  16. GRB 130606A: Continued Skynet/PROMPT observations
  17. Swift Trigger 557674 was due to an onboard position error
  18. GRB 130606B: AGILE-MCAL observation
  19. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  20. Konus-Wind observation of GRB 130605A
  21. Konus-Wind observation of GRB 130606A
  22. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  23. GRB 130606A: P60 Observations
  24. Konus-Wind observation of GRB 130606B
  25. GRB 130606A: PAIRITEL NIR Afterglow Observations
  26. GRB 130606B; Fermi GBM observation
  27. GRB 130606A: RATIR r'-band Dropout
  28. GRB 130606A: 10.4m GTC refined redshift z = 5.91
  29. GRB 130606B: Fermi-LAT detection of a bright hard burst
  30. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  31. GRB 130606A: NOT afterglow detection
  32. GRB 130605A: Continued Skynet/PROMPT observations
  33. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  34. GRB 130603B: rest-frame energetics in gamma-rays
  35. Konus-Wind observation of GRB 130603B
  36. GRB 130603B: MASTER-Net early observations and optical sloap limit
  37. GRB 130604A: MITSuME Okayama upper limits
  38. GRB 130604A: further ISON-NM optical observation
  39. GRB 130604A: KAIT optical upper limit
  40. GRB 130603B: 5.8 GHz VLA detection
  41. GRB 130603A: SON optical observations
  42. GRB 130603B: Gemini Observations
  43. Swift/UVOT observations of GRB130603A
  44. GRB 130603A: MITSuME Okayama Optical Observation
  45. GRB 130528A: Fermi GBM detection
  46. GRB 130527A: Suzaku WAM observation of the prompt emission
  47. GRB 130518A: Suzaku WAM observation of the prompt emission
  48. Konus-Wind observation of GRB 130528A
  49. Konus-Wind observation of GRB 130527A
  50. GRB 130521A: Skynet/PROMPT detection of an extremely red afterglow
  51. GRB 130527A: BOOTES-2 & 3.5m CAHA opt/nIR observations
  52. GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
  53. GRB 130521B: Suzaku WAM observation of the prompt emission
  54. Konus-Wind observation of GRB 130521B
  55. GRB 130514B: Further Swift-XRT Observations
  56. GRB 130515A: Suzaku WAM observation of the prompt emission
  57. GRB 130518A: Gemini Redshift confirmation
  58. GRB 130518A: Continued RATIR Optical Observations - Fading
  59. GRB 130518A: Confirmation of the X-ray afterglow.
  60. Konus-Wind observation of GRB 130518A
  61. GRB 130518A: Fermi LAT detection
  62. GRB 130518A: Fermi GBM detection
  63. GRB 130427A:: BTA spectroscopic observations on May 10/11.
  64. Konus-Wind observation of GRB 130515A
  65. GRB 130427A: Continued RATIR Optical and NIR Observations - Photometric Evidence for a New Component
  66. GRB 130515A: Fermi GBM detection
  67. GRB 130427A: Skynet detections of a possible supernova
  68. GRB 130515A: Swift/UVOT Upper Limits
  69. GRB 130514A: Skynet/PROMPT/DSO Detections
  70. GRB 130427A: Spectroscopic detection of the SN from the 10.4m GTC
  71. GRB 130427A: optical observations
  72. GRB 130514A: RATIR Optical and NIR Observations
  73. GRB 130514B: a long GRB detected by INTEGRAL
  74. GRB 130513A: Swift-XRT detection of the afterglow.
  75. GRB 130514A: P60 Observations
  76. GRB 130513A: a long GRB detected by INTEGRAL
  77. GRB 130511A: Kanata/HOWPol optical observation
  78. GRB 130511A: Upper limit by Xinglong TNT optical observation
  79. GRB 130427A: Keck/LRIS Observations
  80. GRB 130427A: Ten nights of Skynet/PROMPT/GORT observations
  81. GRB 130504C: Swift-XRT afterglow confirmation
  82. GRB 130505A: MITSuME Akeno Optical observation
  83. GRB 130504C: Suzaku WAM observation of the prompt emission
  84. GRB 130504B: Suzaku WAM observation of the prompt emission
  85. GRB 130505A: Suzaku WAM observation of the prompt emission
  86. GRB 130505A: RATIR Optical and NIR Observations
  87. GRB 130427A: RHESSI observations
  88. GRB 130504C: further Swift-XRT observations
  89. Konus-Wind observation of GRB 130504C
  90. GRB 130504C: Fermi GBM detection
  91. GRB 130505A: E_iso record retraction
  92. GRB 130427A: correction to GCN 14487
  93. GRB 130505A: correction to GCN 14575
  94. GRB 130505A: Largest E_iso ever measured
  95. Konus-Wind observation of GRB 130505A
  96. GRB 130504C: Fermi-LAT detection of a burst
  97. GRB 130505A: Xinglong TNT optical observations
  98. GRB 130505A: MITSuME Okayama Optical Observation
  99. Konus-Wind observation of GRB 130504B
  100. GRB 130504B: Fermi GBM detection

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