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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"

36196 results found.

  1. GRB 120327A: Swift-XRT refined Analysis
  2. GRB 120327A: CQUEAN grizY Observation
  3. GRB 120326A: LOAO R-band Observations
  4. GRB 120327A: Swift/UVOT further analysis
  5. GRB 120327A: Swift-BAT refined analysis
  6. GRB 120326A : SMA submm observation
  7. GRB 120327A: Enhanced Swift-XRT position
  8. GRB 120327A: X-shooter redshift
  9. GRB 120327A: Gemini-South redshift
  10. GRB 120327A: TAROT La Silla observatory optical decay
  11. GRB120326A: TNT optical observation
  12. GRB 120327A: IAC80 I-band observations
  13. GROND observations of GRB 120327A
  14. GRB 120327A: REM NIR and optical observations
  15. Skynet/PROMPT observations of GRB120327A
  16. GRB 120326A: Maisoncelles Observatory optical observations
  17. GRB 120327A: Liverpool Telescope Observations
  18. GRB 120327A: TAROT La Silla observatory optical detection
  19. GRB 120327A: Swift detection of a burst with an optical counterpart
  20. GRB 120326A: optical observation of GMG
  21. GRB 120326A : LOT optical observation
  22. GRB 120326A: Swift-BAT refined analysis
  23. GRB 120326A: T17 optical observations
  24. GRB 120326A: GTC redshift
  25. GRB 120326A: CQUEAN grizY Observation
  26. GRB 120323A: MASTER follow up observations
  27. GRB 120326A: Swift-XRT refined Analysis
  28. GRB 120326A: Swift/UVOT Detection
  29. GRB 120326A: Optical observations at Crni Vrh
  30. GRB120326A: IAC80 observations
  31. GRB 120326A: Liverpool Telescope observations
  32. GRB 120326A: Enhanced Swift-XRT position
  33. Skynet/Dolomiti Observations of GRB120326A
  34. GRB 120326A: TAROT Calern observatory afterglow optical decay
  35. GRB 120326A: TAROT Calern observatory afterglow optical detection
  36. GRB 120326A: ROTSE-III Optical Limits
  37. GRB 120326A: Swift detection of a burst
  38. GRB 120323A: Fermi LAT observations
  39. Konus-Wind observation of GRB 120323A
  40. IPN Triangulation of GRB 120323A (short/very intense)
  41. GRB 120324A: Swift-XRT refined Analysis
  42. Konus-Wind observation of GRB 120324A
  43. GRB 120323A: Fermi GBM detection
  44. GRB 120324A: GROND observations
  45. GRB 120324A: CQUEAN rizY Observation
  46. GRB 120324A: Swift-BAT refined analysis
  47. GRB 120324A: Swift/UVOT Upper Limits
  48. GRB 120324A: TAROT La Silla observatory optical observations
  49. GRB 120324A: Enhanced Swift-XRT position
  50. GRB 120324A: Liverpool Telescope optical candidate
  51. GRB 120324A: UVOT Finding Chart Observation
  52. GRB 120324A: Swift detection of a burst
  53. GRB 120316A : Suzaku WAM observation of the prompt emission
  54. GRB 120320A: Zadko optical observations
  55. GRB 120320A, the review of the sky area in plate archives
  56. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  57. GRB 120229A: Magellan observations and limit on an optical afterglow
  58. GRB 120320A: Swift/UVOT Upper Limits
  59. GRB 120320A: MITSuME Okayama Optical upper limits
  60. GRB 120320A , optical observations
  61. GRB 120320A: BOOTES-4 optical upper limit
  62. GRB 120320A: Swift-XRT refined Analysis
  63. GRB 120320A, Swift-BAT refined analysis
  64. GRB 120320A: Gemini-N and UKIRT observations
  65. Fermi GBM trigger 120319.237 is not a GRB
  66. GRB 120320A: Enhanced Swift-XRT position
  67. Konus-Wind observation of GRB 120316A
  68. IPN Triangulation of GRB 120316A
  69. GRB 120320A: MASTER optical observations
  70. GRB 120320A: Swift detection of a burst
  71. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  72. GRB 111228A: possible detection of the SN with the TNG
  73. GRB 120302A: Swift XRT refined analysis
  74. GRB 120312A, the review of the sky area in plate archives
  75. GRB 120312A: CrAO optical upper limit
  76. GRB 120312A: Gemini and UKIRT imaging
  77. GRB 120311A, the review of the sky area in plate archives
  78. Fermi GBM triggers 120309.265 and 120309.402 are not GRBs
  79. GRB 120311A: Optical follow-up
  80. GRB 120311B: Optical follow-up
  81. GRB 120311A: C88 optical limits
  82. GRB 120312A: Swift/UVOT Upper Limits
  83. GRB 120312A: MASTER-NET optical observations
  84. GRB 120312A: WHT candidate afterglow
  85. GRB 120312A: NOT observations
  86. GRB 120312A: Swift-XRT refined Analysis
  87. GRB 120312A: Swift-BAT refined analysis
  88. GRB 120311A: VLT/X-shooter observations
  89. GRB 120311B: C88 optical limits
  90. GRB 120312A: Swift detection of a burst
  91. GROND observations of GRB 120311A
  92. GRB 120311B: Swift/UVOT Upper Limits
  93. GRB 120311B: MITSuME Okayama Optical upper limits
  94. GRB 120311B: Faulkes Telescope North observations
  95. GRB 120311B: Swift-XRT refined Analysis
  96. GRB 120311A: Swift-XRT refined Analysis
  97. GRB 120311B: Enhanced Swift-XRT position
  98. GRB 120311B: Swift-BAT refined analysis
  99. GRB 120311B: Swift-XRT observations
  100. GRB 120311A, Swift-BAT refined analysis

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