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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"

39403 results found.

  1. Trigger 518853: Swift detection of a probable Galactic transient
  2. GRB 120328B: Fermi-LAT Observations
  3. GRB 120327A: Zadko optical observations
  4. GRB 120328B: Fermi GBM detection
  5. long/intense GRB 120328B: MASTER follow up observations
  6. GRB 120328A: Swift/UVOT Upper Limits
  7. GRB 120326A: Bassano Bresciano Observatory further optical observations
  8. GRB 120328A: Swift-XRT refined Analysis
  9. Konus-Wind observation of GRB 120328B
  10. IPN Triangulation of GRB 120328B (long/intense)
  11. GRB 120327A: MITSuME Ishigakijima Optical Observation
  12. GRB 120326A: MITSuME Ishigakijima Optical Observation
  13. GRB 120328A: Swift-BAT refined analysis
  14. GRB 120328A: Enhanced Swift-XRT position
  15. GRB 120327A: NOT optical observations
  16. GRB 120328A: TAROT La Silla observatory optical observations
  17. GRB 120326A: Xinglong TNT further optical observation��correction for GCN Cir 13149)
  18. GRB 120326A: Xinglong TNT further optical observation
  19. Skynet/PROMPT observations of GRB120328A
  20. GRB 120328A: Swift detection of a burst
  21. GRB 120327A: GTC redshift confirmation
  22. GRB 120326A: Fermi GBM Observation
  23. GRB 120327A afterglow detection
  24. GRB 120326A: PAIRITEL NIR Observations
  25. GRB 120326A: Bassano Bresciano Observatory optical observations
  26. GRB 120327A: Swift-XRT refined Analysis
  27. GRB 120327A: CQUEAN grizY Observation
  28. GRB 120326A: LOAO R-band Observations
  29. GRB 120327A: Swift/UVOT further analysis
  30. GRB 120327A: Swift-BAT refined analysis
  31. GRB 120326A : SMA submm observation
  32. GRB 120327A: Enhanced Swift-XRT position
  33. GRB 120327A: X-shooter redshift
  34. GRB 120327A: Gemini-South redshift
  35. GRB 120327A: TAROT La Silla observatory optical decay
  36. GRB120326A: TNT optical observation
  37. GRB 120327A: IAC80 I-band observations
  38. GROND observations of GRB 120327A
  39. GRB 120327A: REM NIR and optical observations
  40. Skynet/PROMPT observations of GRB120327A
  41. GRB 120326A: Maisoncelles Observatory optical observations
  42. GRB 120327A: Liverpool Telescope Observations
  43. GRB 120327A: TAROT La Silla observatory optical detection
  44. GRB 120327A: Swift detection of a burst with an optical counterpart
  45. GRB 120326A: optical observation of GMG
  46. GRB 120326A : LOT optical observation
  47. GRB 120326A: Swift-BAT refined analysis
  48. GRB 120326A: T17 optical observations
  49. GRB 120326A: GTC redshift
  50. GRB 120326A: CQUEAN grizY Observation
  51. GRB 120323A: MASTER follow up observations
  52. GRB 120326A: Swift-XRT refined Analysis
  53. GRB 120326A: Swift/UVOT Detection
  54. GRB 120326A: Optical observations at Crni Vrh
  55. GRB120326A: IAC80 observations
  56. GRB 120326A: Liverpool Telescope observations
  57. GRB 120326A: Enhanced Swift-XRT position
  58. Skynet/Dolomiti Observations of GRB120326A
  59. GRB 120326A: TAROT Calern observatory afterglow optical decay
  60. GRB 120326A: TAROT Calern observatory afterglow optical detection
  61. GRB 120326A: ROTSE-III Optical Limits
  62. GRB 120326A: Swift detection of a burst
  63. GRB 120323A: Fermi LAT observations
  64. Konus-Wind observation of GRB 120323A
  65. IPN Triangulation of GRB 120323A (short/very intense)
  66. GRB 120324A: Swift-XRT refined Analysis
  67. Konus-Wind observation of GRB 120324A
  68. GRB 120323A: Fermi GBM detection
  69. GRB 120324A: GROND observations
  70. GRB 120324A: CQUEAN rizY Observation
  71. GRB 120324A: Swift-BAT refined analysis
  72. GRB 120324A: Swift/UVOT Upper Limits
  73. GRB 120324A: TAROT La Silla observatory optical observations
  74. GRB 120324A: Enhanced Swift-XRT position
  75. GRB 120324A: Liverpool Telescope optical candidate
  76. GRB 120324A: UVOT Finding Chart Observation
  77. GRB 120324A: Swift detection of a burst
  78. GRB 120316A : Suzaku WAM observation of the prompt emission
  79. GRB 120320A: Zadko optical observations
  80. GRB 120320A, the review of the sky area in plate archives
  81. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  82. GRB 120229A: Magellan observations and limit on an optical afterglow
  83. GRB 120320A: Swift/UVOT Upper Limits
  84. GRB 120320A: MITSuME Okayama Optical upper limits
  85. GRB 120320A , optical observations
  86. GRB 120320A: BOOTES-4 optical upper limit
  87. GRB 120320A: Swift-XRT refined Analysis
  88. GRB 120320A, Swift-BAT refined analysis
  89. GRB 120320A: Gemini-N and UKIRT observations
  90. Fermi GBM trigger 120319.237 is not a GRB
  91. GRB 120320A: Enhanced Swift-XRT position
  92. Konus-Wind observation of GRB 120316A
  93. IPN Triangulation of GRB 120316A
  94. GRB 120320A: MASTER optical observations
  95. GRB 120320A: Swift detection of a burst
  96. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  97. GRB 111228A: possible detection of the SN with the TNG
  98. Trigger 517876 is a Swift detection of GX 5-1
  99. GRB 120302A: Swift XRT refined analysis
  100. GRB 120312A, the review of the sky area in plate archives

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