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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"

24521 results found.

  1. Konus-Wind observation of GRB 140619C
  2. GRB 140620A: Swift-XRT observations
  3. IPN Triangulation of GRB 140619C (long/very intense)
  4. GRB 140620A / iPTF14cva: Fermi GBM observations
  5. GRB 140619A: Swift-BAT refined analysis
  6. GRB 140619B: Fermi-LAT Detection
  7. GRB 140619B: Fermi GBM detection of a short GRB
  8. GRB 140619A: Swift-XRT refined Analysis
  9. Swift trigger 601928 is V490 Cep: BAT+XRT refined analysis.
  10. GRB 140614B: MITSuME Akeno upper limits
  11. GRB 140614B: MITSuME Okayama upper limits
  12. GRB 140614B: Swift-BAT refined analysis
  13. GRB 140614A: Swift-BAT refined analysis
  14. GRB 140614B: Swift detection of a burst
  15. GRB 140614A: GROND afterglow candidate
  16. GRB 140611A: Swift-XRT observations
  17. Konus-Wind observation of GRB 140611A
  18. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  19. GRB 140610A: Fermi GBM Detection
  20. IPN Triangulation of GRB 140611A (short/hard)
  21. GRB 140610A: Swift-BAT refined analysis
  22. GRB 140610A: MASTER optical observations
  23. Konus-Wind observation of GRB 140610A
  24. Swift/XRT returns to normal observing
  25. GRB140606B: DCT time of observation correction
  26. GRB 140610A: Swift-XRT observations
  27. GRB 140610A: Swift detection of a burst
  28. Konus-Wind observation of GRB 140606B
  29. GRB 140607A: Swift-BAT refined analysis
  30. GRB 140606B: Swift XRT position
  31. GRB 140606B / Fermi 432717114 / iPTF 14bfu: Keck redshift
  32. GRB 140607A: Swift detection of a burst
  33. GRB 140606B: Fermi GBM detection
  34. Fermi423717114: iPTF optical transient candidates
  35. GRB 140606A: Swift-BAT refined analysis
  36. Swift Trigger 600914 is probably a noise fluctuation
  37. Konus-Wind observation of GRB 140604A
  38. IPN Triangulation of GRB 140604A (short/hard)
  39. Swift XRT is off-line
  40. GRB 140528A: Fermi GBM Detection
  41. Konus-Wind observation of GRB 140529A
  42. Konus-Wind observation of GRB 140528A
  43. GRB 140529A: Swift-XRT afterglow detection.
  44. GRB 140529A found in ground analysis of BAT slew data
  45. Chandra late-time observations of GRB140515A
  46. Swift trigger 600114 is not an outbursting X-ray source
  47. Swift Trigger 600114: Preliminary BAT analysis
  48. Swift Trigger 600114 in M31: Archival and Prompt UVOT Imaging
  49. Swift detection of SFXT IGR J17544-2619
  50. GRB 140523A: NOT observation
  51. Konus-Wind observation of GRB 140523A
  52. Swift trigger 599860 probably not real
  53. GRB 140523A: Fermi-LAT detection
  54. GRB 140523A: Fermi GBM detection
  55. GRB 140521A : Xinglong TNT upper limit
  56. GRB 140521A: Fermi GBM Detection
  57. GRB 140521A: Swift-BAT refined analysis
  58. GRB 140521A: MITSuME Okayama upper limits
  59. GRB 140516A: further Swift-XRT analysis
  60. GRB 140521A: MASTER optical observations
  61. GRB 140521A: Swift detection of a burst
  62. GRB 140512A: MASTER prompt and afterglow optical observations
  63. GRB 140518A, Swift-BAT refined analysis
  64. GRB 140518A: Skynet GORT Detections of the Optical Afterglow
  65. GRB 140518A: P60 i-/z-band detections
  66. GRB 140518A: KAIT optical candidate
  67. GRB 140516A: Subaru NIR imaging observations
  68. GRB 140516A: Gemini-North limit on an optical afterglow
  69. GRB 140516A: Swift-BAT refined analysis
  70. GRB 140516A: NOT optical observations
  71. GRB 140516A: MASTER early optical observations
  72. GRB 140516A: TNG optical observations
  73. GRB 140516A: Swift detection of a short burst
  74. GRB 140515A: Swift-BAT refined analysis
  75. GRB 140515A : TNG near-infrared observations
  76. GRB 140515A: GROND observation of the afterglow
  77. GRB 140515A: KAIT Optical Upper Limit
  78. GRB 140515A: Gemini-North imaging
  79. GRB 140515A: MITSuME Akeno upper limits
  80. Konus-Wind observation of GRB 140512A
  81. GRB 140512A: Fermi GBM detection
  82. GRB 140508A: MITSuME Akeno Optical observation
  83. GRB 140512A: Swift-BAT refined analysis
  84. GRB140512A : GROND observations
  85. GRB 140512A: Swift-XRT refined Analysis
  86. GRB 140512A: Mondy optical detection
  87. GRB 140512A: MASTER OT decay and early light curve
  88. GRB 140512A: MASTER optical observations
  89. GRB 140508A: ​HCT spectroscopy
  90. GRB 140509A: Swift-BAT refined analysis
  91. GRB 140508A: RATIR Optical and NIR Observations
  92. Konus-Wind observation of GRB 140508A
  93. GRB 140508A: Swift-XRT observations
  94. GRB 140508A: NOT photometry and spectroscopy
  95. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  96. GRB 140508A: iPTF optical transient candidate
  97. GRB 140508A: Fermi GBM detection
  98. Konus-Wind observation of GRB 140506A
  99. GRB 140430A: MITSuME Akeno upper limits
  100. GRB 140506A: Fermi GBM Detection

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