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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"

15363 results found.

  1. GRB 130502A: z-band observations from GTC
  2. GRB 130502B: Fermi LAT Detection
  3. GRB 130502A: T100 Observations
  4. GRB 130502A: Swift detection of a burst
  5. GRB 130425A: Suzaku WAM observation of the prompt emission
  6. GRB 130427A: High-energy neutrino search
  7. GRB 130427A: GMRT radio detection
  8. GRB 130427A: high energy gamma-ray detection by AGILE
  9. GRB 130427A: MITSuME Ishigakijima Optical Observation after 2 days
  10. GRB 130427A: Fermi-LAT refined analysis
  11. GRB 130427A in the Ep,i - Eiso plane
  12. GRB 130427A: MITSuME Okayama and Ishigakijima Optical Observation after 1 day
  13. GRB 130427A: Skynet/PROMPT Observations
  14. GRB 130427A: Nishi-Harima NIR Observations
  15. GRB 130427A: CARMA 3mm observations
  16. GRB 130427A optical time series
  17. Konus-Wind observation of GRB 130427A
  18. GRB 130427A: CARMA 85 GHz detection
  19. GRB 130427A: NOT optical photometry and redshift
  20. GRB 130427A: Fermi-LAT detection of a burst
  21. GRB 130427A: MITSuME Okayama Optical Observation
  22. GRB 130427A: Optical Observations
  23. GRB 130427B: Faulkes Telescope North afterglow detection
  24. GRB 130427A: RATIR Optical and NIR Observations
  25. GRB 130427A: Gemini-North redshift
  26. GRB 130427A: MITSuME Akeno Optical observation(T0+8000s~)
  27. GRB 130427A: PAIRITEL NIR Detections
  28. GRB 130427A: Faulkes Telescope North detection
  29. GRB 130427A: P60 early detection
  30. GRB 130427A: P60 early nondetection
  31. Konus-Wind observation of GRB 130425A
  32. Trigger 554491: Swift detection of a spike possibly from Sgr A*
  33. GRB 130425A: Fermi GBM detection
  34. GRB 130420A: ROTSE-III data analysis
  35. GRB 130420A: Early RAPTOR Simultaneous Multi-Color Observations
  36. GRB 130420B: Fermi GBM observation
  37. GRB 130420A: Fermi GBM observation
  38. GRB 130420A: ISON-NM optical observations
  39. Skynet/GORT observations of GRB130420A
  40. Konus-Wind observation of GRB 130418A
  41. GRB130420A : Xinglong TNT optical upper limit
  42. GRB 130420A: PAIRITEL NIR detections
  43. GRB 130327B: Swift/XRT source is not the afterglow
  44. GRB 130418A: LOAO Observation
  45. GRB 130418A: GROND detection of the optical-NIR afterglow
  46. GRB130418A: OSN 1.5m fading afterglow detection
  47. GRB 130418A: Redshift from 10.4m GTC
  48. GRB 130418A: 1.23m I-band observations
  49. GRB 130408A: Suzaku WAM observation of the prompt emission
  50. GRB 130408a: Skynet Optical Observations
  51. Konus-Wind observation of GRB 130408A
  52. GRB 130408A: GROND detection of the afterglow
  53. GRB 130407A Tiled Swift observations
  54. GRB 130211A: Retraction of afterglow candidate
  55. GRB 130327B: Suzaku WAM observation of the prompt emission
  56. Konus-Wind observation of GRB 130320B
  57. GRB 130327A: RATIR Optical/NIR afterglow confirmation
  58. GRB 130306A: Confirmation of the X-ray Afterglow
  59. Konus-Wind observation of GRB 130327B
  60. GRB 130327B: Fermi-LAT detection of a burst
  61. GRB 130327B: Fermi GBM detection
  62. GRB 130327B: gamma-ray detection by AGILE
  63. GRB 130327A: Weihai optical obsevations
  64. Konus-Wind observation of GRB 130325A
  65. GRB 130325A Tiled Swift observations
  66. GRB 130327A: PAIRITEL NIR Afterglow Candidate
  67. GRB 130325A: Fermi LAT detection
  68. Konus-Wind observation of GRB 130320A
  69. GRB 130305A: Gemini follow-up observations
  70. GRB 130313A: 5.8 GHz VLA upper limit
  71. GRB 130310A : Suzaku WAM observation of the prompt emission
  72. GRB 130305A: TLS Tautenburg observations
  73. GRB 130313A: TNG optical observations
  74. GRB 130215A: Detection of the SN with the 10.4m GTC
  75. Swift XRT RETRACTION of GRB 130310A afterglow detection
  76. Konus-Wind observation of GRB 130310A
  77. GRB 130310A: Fermi GBM detection
  78. GRB 130310A: Fermi-LAT detection and localization
  79. GRB 130305A BAT refined circular
  80. GRB 130305A: Further Swift-XRT Observations
  81. Konus-Wind observation of GRB 130306A
  82. GRB 130307A: Fermi GBM detection
  83. GRB 130306A: Fermi GBM observation
  84. GRB 130306A: MASTER-Net pre-Swift alert observation
  85. GRB 100615A: HST host detection and X-shooter redshift
  86. Konus-Wind observation of GRB 130305A
  87. GRB 130305A: Fermi LAT Detection
  88. GBM trigger 383712005 (GRB 130228A?) : Possible high-energy photon emission in Fermi/LAT data
  89. GRB 130219A: Suzaku WAM observation of the prompt emission
  90. Konus-Wind observation of GRB 130219A
  91. GRB 130216B: Suzaku WAM observation of the prompt emission
  92. GRB 130216A: possible radio counterpart is steady field source
  93. GRB 130215A: Suzaku WAM observation of the prompt emission
  94. GRB 130215A: PTF P48 optical detection
  95. GRB 130216A: Further Swift-BAT refined analysis
  96. GRB 130216A: MASTER-Net early observations
  97. GRB 130216B: Fermi GBM observation
  98. GRB 120118B: host observations and redshift determination
  99. GRB 130215A: P200 NIR observations
  100. GRB 130215A: GROND Detection of the Optical/NIR Afterglow

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