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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"

36397 results found.

  1. GRB 120327A: IAC80 I-band observations
  2. GROND observations of GRB 120327A
  3. GRB 120327A: REM NIR and optical observations
  4. Skynet/PROMPT observations of GRB120327A
  5. GRB 120326A: Maisoncelles Observatory optical observations
  6. GRB 120327A: Liverpool Telescope Observations
  7. GRB 120327A: TAROT La Silla observatory optical detection
  8. GRB 120327A: Swift detection of a burst with an optical counterpart
  9. GRB 120326A: optical observation of GMG
  10. GRB 120326A : LOT optical observation
  11. GRB 120326A: Swift-BAT refined analysis
  12. GRB 120326A: T17 optical observations
  13. GRB 120326A: GTC redshift
  14. GRB 120326A: CQUEAN grizY Observation
  15. GRB 120323A: MASTER follow up observations
  16. GRB 120326A: Swift-XRT refined Analysis
  17. GRB 120326A: Swift/UVOT Detection
  18. GRB 120326A: Optical observations at Crni Vrh
  19. GRB120326A: IAC80 observations
  20. GRB 120326A: Liverpool Telescope observations
  21. GRB 120326A: Enhanced Swift-XRT position
  22. Skynet/Dolomiti Observations of GRB120326A
  23. GRB 120326A: TAROT Calern observatory afterglow optical decay
  24. GRB 120326A: TAROT Calern observatory afterglow optical detection
  25. GRB 120326A: ROTSE-III Optical Limits
  26. GRB 120326A: Swift detection of a burst
  27. GRB 120323A: Fermi LAT observations
  28. Konus-Wind observation of GRB 120323A
  29. IPN Triangulation of GRB 120323A (short/very intense)
  30. GRB 120324A: Swift-XRT refined Analysis
  31. Konus-Wind observation of GRB 120324A
  32. GRB 120323A: Fermi GBM detection
  33. GRB 120324A: GROND observations
  34. GRB 120324A: CQUEAN rizY Observation
  35. GRB 120324A: Swift-BAT refined analysis
  36. GRB 120324A: Swift/UVOT Upper Limits
  37. GRB 120324A: TAROT La Silla observatory optical observations
  38. GRB 120324A: Enhanced Swift-XRT position
  39. GRB 120324A: Liverpool Telescope optical candidate
  40. GRB 120324A: UVOT Finding Chart Observation
  41. GRB 120324A: Swift detection of a burst
  42. GRB 120316A : Suzaku WAM observation of the prompt emission
  43. GRB 120320A: Zadko optical observations
  44. GRB 120320A, the review of the sky area in plate archives
  45. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  46. GRB 120229A: Magellan observations and limit on an optical afterglow
  47. GRB 120320A: Swift/UVOT Upper Limits
  48. GRB 120320A: MITSuME Okayama Optical upper limits
  49. GRB 120320A , optical observations
  50. GRB 120320A: BOOTES-4 optical upper limit
  51. GRB 120320A: Swift-XRT refined Analysis
  52. GRB 120320A, Swift-BAT refined analysis
  53. GRB 120320A: Gemini-N and UKIRT observations
  54. Fermi GBM trigger 120319.237 is not a GRB
  55. GRB 120320A: Enhanced Swift-XRT position
  56. Konus-Wind observation of GRB 120316A
  57. IPN Triangulation of GRB 120316A
  58. GRB 120320A: MASTER optical observations
  59. GRB 120320A: Swift detection of a burst
  60. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  61. GRB 111228A: possible detection of the SN with the TNG
  62. GRB 120302A: Swift XRT refined analysis
  63. GRB 120312A, the review of the sky area in plate archives
  64. GRB 120312A: CrAO optical upper limit
  65. GRB 120312A: Gemini and UKIRT imaging
  66. GRB 120311A, the review of the sky area in plate archives
  67. Fermi GBM triggers 120309.265 and 120309.402 are not GRBs
  68. GRB 120311A: Optical follow-up
  69. GRB 120311B: Optical follow-up
  70. GRB 120311A: C88 optical limits
  71. GRB 120312A: Swift/UVOT Upper Limits
  72. GRB 120312A: MASTER-NET optical observations
  73. GRB 120312A: WHT candidate afterglow
  74. GRB 120312A: NOT observations
  75. GRB 120312A: Swift-XRT refined Analysis
  76. GRB 120312A: Swift-BAT refined analysis
  77. GRB 120311A: VLT/X-shooter observations
  78. GRB 120311B: C88 optical limits
  79. GRB 120312A: Swift detection of a burst
  80. GROND observations of GRB 120311A
  81. GRB 120311B: Swift/UVOT Upper Limits
  82. GRB 120311B: MITSuME Okayama Optical upper limits
  83. GRB 120311B: Faulkes Telescope North observations
  84. GRB 120311B: Swift-XRT refined Analysis
  85. GRB 120311A: Swift-XRT refined Analysis
  86. GRB 120311B: Enhanced Swift-XRT position
  87. GRB 120311B: Swift-BAT refined analysis
  88. GRB 120311B: Swift-XRT observations
  89. GRB 120311A, Swift-BAT refined analysis
  90. GRB 120311B: Swift detection of a burst
  91. GRB 120311A: Swift/UVOT Upper Limits
  92. GRB 120311A: CAHA 1.23m I-band early observations
  93. GRB 120311A: Enhanced Swift-XRT position
  94. GRB 120311A: Swift-XRT observations
  95. GRB 120311A: Liverpool Telescope optical candidate
  96. GRB 120311A: Swift detection of a burst
  97. GRB 120308A : LOAO optical observation
  98. GRB 120308A: RTT150 optical observations
  99. GRB 120302A: RTT150 optical observations
  100. GRB 120308A: 1.23m CAHA I-band observations

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