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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"

23733 results found.

  1. GRB 120521A: TAROT La Silla observatory optical observations
  2. GRB 120521A: Swift detection of a short burst
  3. GRB 120514A : Suzaku WAM observation of the prompt emission
  4. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  5. GRB 120514A: GROND upper limits
  6. Konus-Wind observation of GRB 120510A
  7. GRB 120514A: APEX observations of the submm counterpart
  8. GRB 120514A: Swift-BAT refined analysis
  9. GRB 120514A: TAROT Calern observatory optical observations
  10. GRB 120514A: Swift detection of a burst
  11. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  12. GRB 120510A: Swift XRT and UVOT observations
  13. GRB 120510A: MAXI/GSC detection of a burst
  14. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  15. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  16. Konus-Wind observation of GRB 120427A
  17. IPN Triangulation of GRB 120427A
  18. Swift detection of 4U 1630-47
  19. GRB 120422A, the review of the sky area in plate archives
  20. Konus-Wind observation of GRB 120426A
  21. IPN Triangulation of bright GRB 120426A
  22. GRB 120422A: MITSuME Ishigakijima upper limit
  23. Swift Trigger 520928 is probably not a burst
  24. GRB 120424A: MAXI/GSC detection of a burst
  25. GRB 120422A GROND observations
  26. GRB 120422A: EVLA Detection
  27. GRB 120422A: Zadko observatory - Gingin optical observations
  28. GRB 120422A: A Swift/UVOT Detection
  29. GRB 120422A: Swift-BAT refined analysis
  30. GRB 120422A: Gemini observations
  31. GRB 120422A: Faulkes Telescope North observations
  32. GRB 120422A: Swift detection of a burst
  33. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  34. Swift Trigger 519874 is probably a noise event
  35. GRB 120404A: optical observations
  36. GRB 120404A: EVLA Detection
  37. GRB 120404A: MASTER OT observations
  38. GRB120404A: GROND observations show steeply decaying afterglow
  39. GRB 120404A: MITSuME Ishigakijima Optical Observation
  40. GRB 120404A: MITSuME Okayama Optical Observation
  41. GRB 120404A: Swift-BAT refined analysis
  42. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  43. GRB 120403B: TAROT La Silla observatory optical observations
  44. GRB 120404A: Gemini-N Redshift
  45. GRB 120404A: MITSuME Akeno Optical upper limits
  46. GRB 120404A: Faulkes Telescope North afterglow confirmation
  47. GRB 120404A: Swift detection of a burst with an optical counterpart
  48. GRB 120403B: Swift-BAT refined analysis
  49. GRB 120403B: Swift detection of a burst
  50. GRB 120326A, the review of the sky area in plate archives
  51. GRB 120402A: optical upper limit
  52. GRB 120320A: early optical upper limit
  53. GRB 120403A, Swift-BAT refined analysis
  54. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  55. GRB 120402A: Swift detection of a possible burst or noise
  56. GRB 120401A: Swift-BAT refined analysis
  57. GRB 120401A: Swift detection of a burst
  58. GRB120327A - ATCA radio afterglow detection at 34GHz
  59. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  60. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  61. GRB 120326A : Suzaku WAM observation of the prompt emission
  62. GRB 120324A, the review of the sky area in plate archives
  63. GRB 120328A: MITSuME Ishigakijima Optical Upper Limits
  64. GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
  65. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  66. Trigger 518853: Swift detection of a probable Galactic transient
  67. GRB 120327A: Zadko optical observations
  68. long/intense GRB 120328B: MASTER follow up observations
  69. Konus-Wind observation of GRB 120328B
  70. IPN Triangulation of GRB 120328B (long/intense)
  71. GRB 120327A: MITSuME Ishigakijima Optical Observation
  72. GRB 120326A: MITSuME Ishigakijima Optical Observation
  73. GRB 120328A: Swift-BAT refined analysis
  74. GRB 120328A: TAROT La Silla observatory optical observations
  75. Skynet/PROMPT observations of GRB120328A
  76. GRB 120328A: Swift detection of a burst
  77. GRB 120327A: GTC redshift confirmation
  78. GRB 120327A afterglow detection
  79. GRB 120326A: LOAO R-band Observations
  80. GRB 120327A: Swift/UVOT further analysis
  81. GRB 120327A: Swift-BAT refined analysis
  82. GRB 120327A: Gemini-South redshift
  83. GRB 120327A: TAROT La Silla observatory optical decay
  84. GRB 120327A: IAC80 I-band observations
  85. GROND observations of GRB 120327A
  86. Skynet/PROMPT observations of GRB120327A
  87. GRB 120327A: Liverpool Telescope Observations
  88. GRB 120327A: TAROT La Silla observatory optical detection
  89. GRB 120327A: Swift detection of a burst with an optical counterpart
  90. GRB 120326A: optical observation of GMG
  91. GRB 120326A: Swift-BAT refined analysis
  92. GRB 120326A: T17 optical observations
  93. GRB 120326A: GTC redshift
  94. GRB 120326A: Swift/UVOT Detection
  95. GRB120326A: IAC80 observations
  96. GRB 120326A: Liverpool Telescope observations
  97. Skynet/Dolomiti Observations of GRB120326A
  98. GRB 120326A: TAROT Calern observatory afterglow optical decay
  99. GRB 120326A: TAROT Calern observatory afterglow optical detection
  100. GRB 120326A: Swift detection of a burst

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