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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"

43051 results found.

  1. Konus-Wind observation of GRB 110802A
  2. IPN triangulation of GRB110802A (short/hard burst)
  3. GRB 110801A: optical observations in CrAO
  4. EVLA observation for Fermi burst GRB 110721A
  5. GRB 110731A : Suzaku WAM observation of the prompt emission
  6. GRB 110726A: Swift-XRT refined Analysis
  7. GRB110731A: MOA optical observations of the steeply fading afterglow
  8. GRB 110801A: SAO RAS optical observations
  9. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  10. GRB 110801A: Swift-BAT refined analysis
  11. Swift/UVOT observations of GRB110801A
  12. GRB 110801A: Swift-XRT refined Analysis
  13. GRB 110801A: Afterglow redshift from 10.4m GTC
  14. GRB110801A: MITSuME Ishigakijima Optical Observation
  15. GRB 110801A: Enhanced Swift-XRT position
  16. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  17. GRB 110801A: Swift detection of a burst with an optical counterpart
  18. GRB 110731A / EVLA upper limits
  19. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  20. GRB 110731A Gemini-N redshift
  21. GRB 110731A: Swift-XRT refined Analysis
  22. Konus-Wind observation of GRB 110731A
  23. GRB110731A: Swift/UVOT Observations
  24. GRB 110731A: Fermi GBM observation
  25. GRB 110731A: NOT photometry
  26. GRB 110731A: Enhanced Swift-XRT position
  27. Fermi-LAT Detection of GRB110731A
  28. GRB 110731A: Swift-BAT refined analysis
  29. GRB 110731A: FTN+FTS afterglow observations
  30. GRB 110731A: Swift detection of a burst with an optical counterpart
  31. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  32. INTEGRAL Weak trigger #6331: GRT Optical Observation
  33. GRB 110721A: Swift observations of afterglow candidate
  34. AXP 4U 0142+61: Swift-BAT refined analysis
  35. Swift detection of a SGR-like burst from the AXP 4U 0142+61
  36. Swift triggers 458268 and 458269 are not astrophysical
  37. GRB 110726A: EVLA observations
  38. GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
  39. GRB110726A: MITSuME Ishigakijima Optical Observation
  40. GRB 110726A: Further Swift/UVOT Observations
  41. GRB110726A: Gemini-N tentative redshift
  42. GRB 110726A: Swift-BAT refined analysis
  43. GRB 110726A: Enhanced Swift-XRT position
  44. GRB 110726A: Swift/UVOT Detection
  45. GRB 110726A: Liverpool Telescope observations
  46. GRB 110726A: Swift detection of a burst
  47. IPN triangulation of GRB 110721A
  48. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  49. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  50. GRB 110721A: potential counterpart candidate
  51. Konus-Wind observation of GRB 110721A
  52. GRB 110709B / EVLA detection of radio counterpart
  53. GRB 110719A / SMA 345 GHz upper limits
  54. GRB 110721A: Fermi-LAT detection
  55. GRB 110721A: Fermi GBM detection
  56. Recent GCN/Swift-BAT Slew Burst Position notices are due to playback debugging
  57. GRB110715A: spectral lag analysis
  58. GRB 110715A : Suzaku WAM observation of the prompt emission
  59. GRB 110719A: GRT Optical Observation
  60. GRB 110719A: optical limit by "Pi of the Sky"
  61. GRB 110719A: z-band upper limit
  62. Swift/UVOT observations of GRB110719A
  63. Swift J1822.3-1606 : Fermi GBM observation
  64. GRB 110719A: Swift-XRT refined Analysis
  65. GRB 110719A: Enhanced Swift-XRT position
  66. GRB 110719A: Swift-BAT refined analysis
  67. GRB 110715A optical observations
  68. GRB 110719A: Swift detection of a burst
  69. GRB 110709B : Suzaku WAM observation of the prompt emission
  70. GRB 110715A: ATCA detection of the radio counterpart
  71. Swift J1822.3-1606: Transient Magnetar or Be X-ray Binary?
  72. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  73. GRB 110715A: APEX detection of the submm counterpart
  74. Swift J1822.3-1606
  75. Konus-Wind observation of GRB 110715A
  76. GRB 110715A: Swift-XRT refined Analysis
  77. GRB110715A: VLT redshift
  78. Swift J1822.3-1606: Swift-XRT detection of the X-ray counterpart
  79. GRB 110715A: Swift/UVOT Detection
  80. GRB 110715A: Enhanced Swift-XRT position
  81. GRB 110715A: Swift-BAT refined analysis
  82. Swift J1822.3-1606: A Probable New SGR in Ground Analysis of BAT Data
  83. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  84. GRB 110709B: Swift/UVOT Observations
  85. GRB 110709A / EVLA upper limits
  86. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  87. Swift trigger 457076 is not a GRB
  88. Konus-Wind observation of GRB 110708B
  89. GRB 110709A: Suzaku WAM observation of the prompt emission
  90. GRB 110709B: Submm observations from APEX
  91. IPN triangulation of GRB 110708B (long duration, extremely intense)
  92. Swift Trigger 457076: a possible GRB
  93. GRB 110709A: Swift/UVOT Upper Limits
  94. GRB 110708A: Konkoly observations
  95. GRB 110709B BAT refined analysis
  96. GRB 110709B: burst detection from Swift-BAT slew data
  97. GRB 110709B: Swift-XRT refined Analysis
  98. GRB 110709A: Swift-XRT refined Analysis
  99. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  100. GRB110709A: MITSuME Ishigakijima Optical upper limits

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