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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"

28244 results found.

  1. GRB 120802A: Swift detection of a burst
  2. GRB 120728B: Fermi GBM detection
  3. Konus-Wind observation of GRB 120728B
  4. GRB 120729A: break in the optical light curve
  5. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  6. GRB 120729A: EVLA Observations
  7. Virtual Telescope observations of GRB 120729A
  8. GRB 120729A: UKIRT Observation
  9. T100 observations of GRB 120729A
  10. GRB 120728A: GROND Afterglow discovery
  11. GRB 120729A: Swift-XRT refined Analysis
  12. GRB 120729A: Swift/UVOT Detection
  13. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  14. GRB 120729A: Enhanced Swift-XRT position
  15. GRB 120728A: Swift/UVOT Upper Limits
  16. GRB 120729A Gemini-N redshift
  17. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  18. GRB 120729A: Swift detection of a burst with an optical afterglow
  19. GRB 120728A: Swift-XRT refined Analysis
  20. GRB 120728A: Enhanced Swift-XRT position
  21. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  22. GRB 120728A: GROND observations
  23. GRB 120728A: Swift detection of a burst
  24. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  25. GRB 120716A: optical observation in Maidanak observatory
  26. Swift Trigger 528925 is probably a noise fluctuation
  27. GRB 120722A: optical upper limit
  28. GRB 120724A: optical observation in Maidanak observatory
  29. GRB 120716A: optical observation in CrAO
  30. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  31. GRB 120724A: Enhanced Swift-XRT position
  32. GRB 120724A: Swift-XRT refined Analysis
  33. GRB 120724A: Gemini-N tentative redshift
  34. GRB 120724A: FTN optical afterglow candidate
  35. GRB 120724A: Swift detection of a burst
  36. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  37. GRB 120722A: Swift/UVOT Upper Limits
  38. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  39. GRB 120722A: GROND detection of the afterglow
  40. GRB 120722A: 1.5m OSN I-band observations
  41. GRB 120722A: Swift-XRT refined Analysis
  42. GRB 120722A: Enhanced Swift-XRT position
  43. GRB 120722A: Correction for GCN circ.13500
  44. GRB 120722A: Xinglong TNT optical afterglow candidate
  45. GRB 120722A: Swift detection of a burst
  46. GRB 120716A: EVLA Detection
  47. GRB 120716A: Swift-XRT detection
  48. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  49. VLT/FORS2 redshift of GRB120716A
  50. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  51. GRB 120716A: Optical decay from NOT
  52. GRB 120716A: Candidate Optical Afterglow from PTF
  53. Konus-Wind observation of GRB 120716A
  54. GRB 120711A: ATCA 34GHz final observations (upper limit)
  55. GRB 120714B: Swift/UVOT Detection
  56. GRB 120714B: Swift-XRT refined Analysis
  57. GRB120714A: Swift/UVOT upper limits
  58. GRB 120714A: GROND upper limits
  59. GRB 120714B: GROND confirmation of fading afterglow
  60. GRB 120714A: Swift-XRT refined Analysis
  61. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  62. GRB 120624B: VLA Observations
  63. GRB 120714B: Position Correction and Candidate Optical Afterglow
  64. GRB 120714B: Swift detection of a burst
  65. GRB 120714A: Enhanced Swift-XRT position
  66. GRB 120711A: INTEGRAL/SPI observations
  67. GRB120714A: UVOT non-detection
  68. GRB 120714A: Swift-XRT observations
  69. GRB120711B: MITSuME Ishigakijima upper limits
  70. GRB 120714A: Swift detection of a burst
  71. GRB 120711A: ATCA 34GHz further observations (upper limit)
  72. IPN Triangulation of GRB 120709A
  73. GRB 120712A: Swift/UVOT Detection
  74. GRB 120712A: Swift-XRT refined Analysis
  75. GRB 120712A Gemini-S redshift
  76. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  77. GRB 120712A: Enhanced Swift-XRT position
  78. GRB 120712A: Swift detection of a burst with optical afterglow
  79. GRB 120711B: Swift-XRT refined Analysis
  80. GRB 120711A: Fermi LAT Detection
  81. GRB 120711A: ATCA 34GHz upper limit
  82. GRB 120711B: Swift/UVOT Upper Limits
  83. GRB 120711A: Swift/UVOT Observations
  84. GRB 120709A: Swift/UVOT Observations
  85. Konus-Wind observation of GRB 120711A
  86. GRB 120711A: Fermi LAT detection
  87. GRB 120711A: MASTER early OT detection
  88. GRB 120711A: Swift-XRT observations
  89. GRB 120711A Gemini-S likely redshift
  90. Konus-Wind observation of GRB 120709A
  91. GRB 120711A: REM NIR early time detection
  92. GRB 120711A: GROND photometric redshift
  93. GRB 120711A: MAXI/GSC detection
  94. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  95. Swift detection of GRB 120711B or a new Galactic transient
  96. Skynet/PROMPT Observations of GRB120711A
  97. GRB 120709A: Fermi GBM detection
  98. GRB 120709A: Swift-XRT observations
  99. GRB 120709A: optical afterglow limits
  100. GRB 120709A: Fermi-LAT Detection

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