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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"

11779 results found.

  1. GRB 120402A: optical upper limit
  2. GRB 120320A: optical upper limit in Mondy observatory
  3. GRB 120320A: early optical upper limit
  4. GRB 120402A: MASTER follow up observations
  5. GRB 120401A: Swift-XRT refined Analysis
  6. GRB 120326A : Suzaku WAM observation of the prompt emission
  7. GRB 120326A: Bassano Bresciano Observatory optical observations
  8. GRB 120328B: Fermi-LAT Observations
  9. GRB 120328A: Swift/UVOT Upper Limits
  10. Konus-Wind observation of GRB 120328B
  11. GRB 120328A: Swift-BAT refined analysis
  12. GRB 120328A: Enhanced Swift-XRT position
  13. GRB 120326A: Xinglong TNT further optical observation��correction for GCN Cir 13149)
  14. GRB 120326A: Xinglong TNT further optical observation
  15. GRB 120328A: Swift detection of a burst
  16. GRB 120326A: Fermi GBM Observation
  17. GRB 120326A: Bassano Bresciano Observatory optical observations
  18. GRB 120327A: CQUEAN grizY Observation
  19. GRB 120327A: Swift/UVOT further analysis
  20. GRB120326A: TNT optical observation
  21. GRB 120326A: Swift-BAT refined analysis
  22. GRB 120326A: Swift-XRT refined Analysis
  23. GRB120326A: IAC80 observations
  24. GRB 120326A: ROTSE-III Optical Limits
  25. GRB 120326A: Swift detection of a burst
  26. Konus-Wind observation of GRB 120323A
  27. IPN Triangulation of GRB 120323A (short/very intense)
  28. Konus-Wind observation of GRB 120324A
  29. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  30. GRB 120320A: MITSuME Okayama Optical upper limits
  31. GRB 120320A , optical observations
  32. GRB 120320A: Swift-XRT refined Analysis
  33. Konus-Wind observation of GRB 120316A
  34. GRB 120320A: MASTER optical observations
  35. GRB 120320A: Swift detection of a burst
  36. GRB 120311A: C88 optical limits
  37. GRB 120312A: Swift-XRT refined Analysis
  38. GRB 120312A: Swift detection of a burst
  39. GROND observations of GRB 120311A
  40. GRB 120311B: Swift detection of a burst
  41. GRB 120302A: RTT150 optical observations
  42. GRB 120308A: Swift/UVOT Detection
  43. GRB 120308A: Swift-XRT refined Analysis
  44. GRB 120308A: Swift detection of a burst
  45. GRB 120302A, the review of the sky area in plate archives
  46. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  47. GRB 120305A: Swift-BAT refined analysis
  48. GRB 120302A, Swift-BAT refined analysis
  49. Konus-Wind observation of GRB 120226A
  50. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  51. IPN Triangulation of GRB 120226A
  52. GRB 120226A: Fermi-LAT detection of a burst
  53. GRB 120219A, the review of the sky area in plate archives
  54. GRB 120224A: Swift-XRT refined Analysis
  55. GRB 120224A: Swift-BAT refined analysis
  56. GRB 120224A: Swift detection of a burst
  57. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  58. GRB120219A: Keck Observations
  59. GRB 120219A: Swift-XRT refined Analysis
  60. GRB 120219A: Swift detection of a burst
  61. GRB 120218A: Swift detection of a burst
  62. GRB 120215A: Swift-XRT refined Analysis
  63. Fermi GBM detection of an SGR-like burst
  64. GRB 120215A: Swift detection of a burst
  65. GRB 120213A: MASTER-NET early optical observations
  66. GRB 120213A: Prompt enhanced Swift-XRT position
  67. GRB 120212A: Swift-XRT refined Analysis
  68. GRB 120212A: Swift-XRT observations
  69. GRB 120211A, optical observations
  70. GRB 120211A: Swift-XRT refined Analysis
  71. GRB 120211A: Swift detection of a burst
  72. GRB 120202A: A long GRB detected by INTEGRAL
  73. GRB 120129A: MASTER optical observations
  74. Konus-Wind observation of GRB 120129A
  75. IPN Triangulation of GRB 120129A (long/intense)
  76. GRB 120127A: MAXI/GSC detection of a probable GRB
  77. GRB 120119A: optical observations
  78. GRB 120118B: RTT150 optical observations
  79. GRB 120119A: Swift-XRT refined Analysis
  80. Konus-Wind observation of GRB 120119A
  81. GRB 120118B: Swift-XRT refined Analysis
  82. XRF 120118A: early optical limit by "Pi of the Sky"
  83. XRF 120118A: an X-Ray Flash detected by INTEGRAL
  84. GRB 120116A: Swift-XRT refined Analysis
  85. GRB 120116A: Mondy optical observations
  86. GRB 120116A: Optical observations at Crni Vrh
  87. GRB 120116A: Swift detection of a burst
  88. GRB 120114A found in ground analysis of BAT data
  89. GRB 120106A: optical upper limit
  90. Konus-Wind observation of GRB 120107A
  91. GRB 120106A: MITSuME Okayama Ks-band upper limit
  92. GRB 120106A: Swift detection of a burst
  93. GRB 111225A, the review of the sky area in plate archives
  94. GRB 111222A, the review of the sky area in plate archives
  95. Konus-Wind observation of GRB 120102A
  96. GRB 120102A: Swift-BAT refined analysis
  97. Konus-Wind observation of GRB 111228A
  98. GRB 111228A: MASTER-Net optical photometry
  99. GRB 111229A: Swift/UVOT Detection
  100. GRB 111229A: Swift detection of a burst

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