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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"

43045 results found.

  1. GRB110731A: MOA optical observations of the steeply fading afterglow
  2. GRB 110801A: SAO RAS optical observations
  3. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  4. GRB 110801A: Swift-BAT refined analysis
  5. Swift/UVOT observations of GRB110801A
  6. GRB 110801A: Swift-XRT refined Analysis
  7. GRB 110801A: Afterglow redshift from 10.4m GTC
  8. GRB110801A: MITSuME Ishigakijima Optical Observation
  9. GRB 110801A: Enhanced Swift-XRT position
  10. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  11. GRB 110801A: Swift detection of a burst with an optical counterpart
  12. GRB 110731A / EVLA upper limits
  13. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  14. GRB 110731A Gemini-N redshift
  15. GRB 110731A: Swift-XRT refined Analysis
  16. Konus-Wind observation of GRB 110731A
  17. GRB110731A: Swift/UVOT Observations
  18. GRB 110731A: Fermi GBM observation
  19. GRB 110731A: NOT photometry
  20. GRB 110731A: Enhanced Swift-XRT position
  21. Fermi-LAT Detection of GRB110731A
  22. GRB 110731A: Swift-BAT refined analysis
  23. GRB 110731A: FTN+FTS afterglow observations
  24. GRB 110731A: Swift detection of a burst with an optical counterpart
  25. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  26. INTEGRAL Weak trigger #6331: GRT Optical Observation
  27. GRB 110721A: Swift observations of afterglow candidate
  28. AXP 4U 0142+61: Swift-BAT refined analysis
  29. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  30. Swift triggers 458268 and 458269 are not astrophysical
  31. GRB 110726A: EVLA observations
  32. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  33. GRB110726A: MITSuME Ishigakijima Optical Observation
  34. GRB 110726A: Further Swift/UVOT Observations
  35. GRB110726A: Gemini-N tentative redshift
  36. GRB 110726A: Swift-BAT refined analysis
  37. GRB 110726A: Enhanced Swift-XRT position
  38. GRB 110726A: Swift/UVOT Detection
  39. GRB 110726A: Liverpool Telescope observations
  40. GRB 110726A: Swift detection of a burst
  41. IPN triangulation of GRB 110721A
  42. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  43. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  44. GRB 110721A: potential counterpart candidate
  45. Konus-Wind observation of GRB 110721A
  46. GRB 110709B / EVLA detection of radio counterpart
  47. GRB 110719A / SMA 345 GHz upper limits
  48. GRB 110721A: Fermi-LAT detection
  49. GRB 110721A: Fermi GBM detection
  50. Recent GCN/Swift-BAT Slew Burst Position notices are due to playback debugging
  51. GRB110715A: spectral lag analysis
  52. GRB 110715A : Suzaku WAM observation of the prompt emission
  53. GRB 110719A: GRT Optical Observation
  54. GRB 110719A: optical limit by "Pi of the Sky"
  55. GRB 110719A: z-band upper limit
  56. Swift/UVOT observations of GRB110719A
  57. Swift J1822.3-1606 : Fermi GBM observation
  58. GRB 110719A: Swift-XRT refined Analysis
  59. GRB 110719A: Enhanced Swift-XRT position
  60. GRB 110719A: Swift-BAT refined analysis
  61. GRB 110715A optical observations
  62. GRB 110719A: Swift detection of a burst
  63. GRB 110709B : Suzaku WAM observation of the prompt emission
  64. GRB 110715A: ATCA detection of the radio counterpart
  65. Swift J1822.3-1606: Transient Magnetar or Be X-ray Binary?
  66. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  67. GRB 110715A: APEX detection of the submm counterpart
  68. Swift J1822.3-1606
  69. Konus-Wind observation of GRB 110715A
  70. GRB 110715A: Swift-XRT refined Analysis
  71. GRB110715A: VLT redshift
  72. Swift J1822.3-1606: Swift-XRT detection of the X-ray counterpart
  73. GRB 110715A: Swift/UVOT Detection
  74. GRB 110715A: Enhanced Swift-XRT position
  75. GRB 110715A: Swift-BAT refined analysis
  76. Swift J1822.3-1606: A Probable New SGR in Ground Analysis of BAT Data
  77. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  78. GRB 110709B: Swift/UVOT Observations
  79. GRB 110709A / EVLA upper limits
  80. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  81. Swift trigger 457076 is not a GRB
  82. Konus-Wind observation of GRB 110708B
  83. GRB 110709A: Suzaku WAM observation of the prompt emission
  84. GRB 110709B: Submm observations from APEX
  85. IPN triangulation of GRB 110708B (long duration, extremely intense)
  86. Swift Trigger 457076: a possible GRB
  87. GRB 110709A: Swift/UVOT Upper Limits
  88. GRB 110708A: Konkoly observations
  89. GRB 110709B BAT refined analysis
  90. GRB 110709B: burst detection from Swift-BAT slew data
  91. GRB 110709B: Swift-XRT refined Analysis
  92. GRB 110709A: Swift-XRT refined Analysis
  93. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  94. GRB110709A: MITSuME Ishigakijima Optical upper limits
  95. Konus-Wind observation of GRB 110709A
  96. GRB 110709B: Enhanced Swift-XRT position
  97. Konus-Wind observation of GRB 110709B
  98. GRB110709A: upper limits from CAHA 1.23m and OSN 1.5m
  99. GRB 110709A: Fermi GBM observation
  100. GRB 110709B: Gemini-South additional analysis and photometry

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