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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"

26489 results found.

  1. GRB 120326A: Cima Rest and Bassano Brescia
  2. GRB 120401A: Swift-XRT refined Analysis
  3. GRB 120401A: Swift-BAT refined analysis
  4. GRB 120401A: Enhanced Swift-XRT position
  5. GRB 120401A: Prompt enhanced Swift-XRT position
  6. GRB 120401A: Swift detection of a burst
  7. GRB120327A - ATCA radio afterglow detection at 34GHz
  8. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  9. GRB 120326A : Suzaku WAM observation of the prompt emission
  10. GRB 120326A: Bassano Bresciano Observatory optical observations
  11. Swift trigger 518853: MASTER-ICATE possible OT
  12. Trigger 518853: Swift detection of a probable Galactic transient
  13. GRB 120328B: Fermi-LAT Observations
  14. GRB 120327A: Zadko optical observations
  15. GRB 120328B: Fermi GBM detection
  16. GRB 120328A: Swift-XRT refined Analysis
  17. Konus-Wind observation of GRB 120328B
  18. IPN Triangulation of GRB 120328B (long/intense)
  19. GRB 120328A: Swift-BAT refined analysis
  20. GRB 120328A: Enhanced Swift-XRT position
  21. GRB 120328A: TAROT La Silla observatory optical observations
  22. GRB 120326A: Xinglong TNT further optical observation��correction for GCN Cir 13149)
  23. GRB 120326A: Xinglong TNT further optical observation
  24. GRB 120328A: Swift detection of a burst
  25. GRB 120327A: GTC redshift confirmation
  26. GRB 120326A: Fermi GBM Observation
  27. GRB 120327A afterglow detection
  28. GRB 120326A: Bassano Bresciano Observatory optical observations
  29. GRB 120327A: Swift-XRT refined Analysis
  30. GRB 120327A: CQUEAN grizY Observation
  31. GRB 120327A: Swift-BAT refined analysis
  32. GRB 120327A: Enhanced Swift-XRT position
  33. Skynet/PROMPT observations of GRB120327A
  34. GRB 120326A: Maisoncelles Observatory optical observations
  35. GRB 120327A: TAROT La Silla observatory optical detection
  36. GRB 120327A: Swift detection of a burst with an optical counterpart
  37. GRB 120326A : LOT optical observation
  38. GRB 120326A: Swift-BAT refined analysis
  39. GRB 120326A: Swift-XRT refined Analysis
  40. GRB 120326A: Optical observations at Crni Vrh
  41. GRB 120326A: Enhanced Swift-XRT position
  42. Skynet/Dolomiti Observations of GRB120326A
  43. GRB 120326A: TAROT Calern observatory afterglow optical detection
  44. GRB 120326A: Swift detection of a burst
  45. Konus-Wind observation of GRB 120323A
  46. IPN Triangulation of GRB 120323A (short/very intense)
  47. GRB 120324A: Swift-XRT refined Analysis
  48. Konus-Wind observation of GRB 120324A
  49. GRB 120323A: Fermi GBM detection
  50. GRB 120324A: GROND observations
  51. GRB 120324A: CQUEAN rizY Observation
  52. GRB 120324A: Swift-BAT refined analysis
  53. GRB 120324A: Swift/UVOT Upper Limits
  54. GRB 120324A: TAROT La Silla observatory optical observations
  55. GRB 120324A: Enhanced Swift-XRT position
  56. GRB 120324A: Swift detection of a burst
  57. Simultaneous optical images of Swift pointing are available by GRT
  58. GRB 120316A : Suzaku WAM observation of the prompt emission
  59. GRB 120320A: Zadko optical observations
  60. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  61. GRB 120320A: Swift/UVOT Upper Limits
  62. GRB 120320A: BOOTES-4 optical upper limit
  63. GRB 120320A: Swift-XRT refined Analysis
  64. GRB 120320A, Swift-BAT refined analysis
  65. GRB 120320A: Enhanced Swift-XRT position
  66. Konus-Wind observation of GRB 120316A
  67. IPN Triangulation of GRB 120316A
  68. GRB 120320A: Swift detection of a burst
  69. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  70. GRB 111228A: possible detection of the SN with the TNG
  71. GRB 120312A: Gemini and UKIRT imaging
  72. Fermi GBM triggers 120309.265 and 120309.402 are not GRBs
  73. GRB 120311A: C88 optical limits
  74. GRB 120312A: MASTER-NET optical observations
  75. GRB 120312A: Swift-BAT refined analysis
  76. GRB 120311B: C88 optical limits
  77. GRB 120312A: Swift detection of a burst
  78. GROND observations of GRB 120311A
  79. GRB 120311B: Swift-XRT refined Analysis
  80. GRB 120311A: Swift-XRT refined Analysis
  81. GRB 120311B: Enhanced Swift-XRT position
  82. GRB 120311B: Swift-BAT refined analysis
  83. GRB 120311A, Swift-BAT refined analysis
  84. GRB 120311B: Swift detection of a burst
  85. GRB 120311A: Swift/UVOT Upper Limits
  86. GRB 120311A: Enhanced Swift-XRT position
  87. GRB 120311A: Swift detection of a burst
  88. GRB 120308A: RTT150 optical observations
  89. GRB 120302A: RTT150 optical observations
  90. GRB 120308A: Swift/UVOT Detection
  91. GRB 120308A: Swift-XRT refined Analysis
  92. GRB 120308A: Enhanced Swift-XRT position
  93. GRB 120308A: Swift-BAT refined analysis
  94. GRB 120308A: Swift detection of a burst
  95. GRB 120302A: Fermi GBM Observation
  96. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  97. GRB 120305A: Swift-XRT refined Analysis
  98. GRB 120305A: Enhanced Swift-XRT position
  99. GRB 120305A: Swift-BAT refined analysis
  100. GRB 120305A: Swift detection of a short burst

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