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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"

36349 results found.

  1. GRB110801A: MITSuME Ishigakijima Optical Observation at 1 day after the burst
  2. GRB 110801A: Evidence for a jet break
  3. GRB 110801A: MASTER OT observations
  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. AXP 4U 0142+61: Fermi GBM detection
  11. GRB 110801A: TLS Optical afterglow confirmation
  12. GRB 110801A: ROTSE-III Detection of re-brightening from OT
  13. GRB 110801A: Swift detection of a burst with an optical counterpart
  14. GRB 110731A / EVLA upper limits
  15. GRB110731A: MITSuME Ishigakijima Optical Upper Limits
  16. GRB 110731A Gemini-N redshift
  17. GRB 110731A: Swift-XRT refined Analysis
  18. Konus-Wind observation of GRB 110731A
  19. GRB110731A: Swift/UVOT Observations
  20. GRB 110731A: Fermi GBM observation
  21. GRB 110731A: NOT photometry
  22. GRB 110731A: Enhanced Swift-XRT position
  23. Fermi-LAT Detection of GRB110731A
  24. GRB 110731A: Swift-BAT refined analysis
  25. GRB 110731A: FTN+FTS afterglow observations
  26. GRB 110731A: Swift detection of a burst with an optical counterpart
  27. Sw J1644+57 (GRB 110328A): Continued VLBA Observations
  28. GRB 110721A: Swift observations of afterglow candidate
  29. GRB 110726A: optical upper limit in CrAO
  30. GRB 110726A: EVLA observations
  31. GRB 110726A: IAC80 R-band 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 110726: ROTSE-III Detection of Optical Counterpart
  41. GRB 110726A: Swift detection of a burst
  42. IPN triangulation of GRB 110721A
  43. GRB 110721A: Preliminary Swift/UVOT Upper Limits
  44. GRB 110721A: Gemini-South spectroscopy of the potential optical counterpart
  45. GRB 110721A: potential counterpart candidate
  46. Konus-Wind observation of GRB 110721A
  47. GRB 110709B / EVLA detection of radio counterpart
  48. GRB 110719A / SMA 345 GHz upper limits
  49. GRB 110721A: Fermi-LAT detection
  50. GRB 110721A: Fermi GBM detection
  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. GRB 110719A: Swift-XRT refined Analysis
  58. GRB 110719A: optical upper limit
  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. GRB110715A: GROND Detection of the Optical/NIR Afterglow
  66. GRB 110715A: APEX detection of the submm counterpart
  67. Konus-Wind observation of GRB 110715A
  68. GRB 110715A: Swift-XRT refined Analysis
  69. GRB110715A: VLT redshift
  70. GRB 110715A: Swift/UVOT Detection
  71. GRB 110715A: Enhanced Swift-XRT position
  72. GRB 110715A: Swift-BAT refined analysis
  73. GRB 110715A: Swift detection of a bright burst with an optical counterpart
  74. GRB 110709B: Swift/UVOT Observations
  75. GRB 110709A / EVLA upper limits
  76. GRB 110709B: Additional Gemini observations and deep limits on an optical afterglow
  77. Swift trigger 457076 is not a GRB
  78. Konus-Wind observation of GRB 110708B
  79. GRB 110709A: Suzaku WAM observation of the prompt emission
  80. GRB 110709B: Submm observations from APEX
  81. IPN triangulation of GRB 110708B (long duration, extremely intense)
  82. Swift Trigger 457076: a possible GRB
  83. GRB 110709A: Swift/UVOT Upper Limits
  84. Fermi Gamma-ray Burst Monitor trigger 332078586 is not a GRB
  85. GRB 110709A: Konkoly observations
  86. GRB 110708A: Konkoly observations
  87. GRB 110709B BAT refined analysis
  88. GRB 110709B: burst detection from Swift-BAT slew data
  89. GRB 110709B: Swift-XRT refined Analysis
  90. GRB 110709A: Swift-XRT refined Analysis
  91. GRB 110709B: Swift/UVOT Detection of Possible Optical Flaring
  92. GRB110709A: MITSuME Ishigakijima Optical upper limits
  93. Konus-Wind observation of GRB 110709A
  94. GRB 110709B: correction to GCN 12135 (Konus-Wind peak flux)
  95. GRB 110709B: Enhanced Swift-XRT position
  96. Konus-Wind observation of GRB 110709B
  97. GRB 110709A: Fermi GBM observation
  98. GRB 110709B: Gemini-South additional analysis and photometry
  99. GRB 110709B : A possible source in USNO B 1.0
  100. GRB 110709B: Preliminary Swift-BAT refined analysis

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