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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"

37699 results found.

  1. GRB 120729A, Swift-BAT refined analysis
  2. GRB 120728A, Swift-BAT refined analysis
  3. GRB 120729A: Enhanced Swift-XRT position
  4. GRB 120728A: Swift/UVOT Upper Limits
  5. GRB 120729A Gemini-N redshift
  6. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  7. GRB 120729A: Swift detection of a burst with an optical afterglow
  8. GRB 120728A: Swift-XRT refined Analysis
  9. GRB 120728A: Enhanced Swift-XRT position
  10. GRB 120728A: GROND observations
  11. GRB 120728A: Swift detection of a burst
  12. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  13. GRB 120716A: optical observation in Maidanak observatory
  14. GRB 120722A: optical upper limit
  15. GRB 120724A: optical observation in Maidanak observatory
  16. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  17. GRB 120716A: optical observation in CrAO
  18. GRB 120724A, Swift-BAT refined analysis
  19. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  20. GRB 120724A: Enhanced Swift-XRT position
  21. GRB 120724A: Swift-XRT refined Analysis
  22. GRB 120724A: Gemini-N tentative redshift
  23. GRB 120724A: FTN optical afterglow candidate
  24. GRB 120724A: Swift detection of a burst
  25. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  26. GRB 120722A: Swift/UVOT Upper Limits
  27. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  28. GRB 120722A: GROND detection of the afterglow
  29. GRB 120722A: 1.5m OSN I-band observations
  30. GRB 120722A: Swift-XRT refined Analysis
  31. GRB 120722A: Swift-BAT refined analysis
  32. GRB 120722A: Enhanced Swift-XRT position
  33. GRB 120722A: Correction for GCN circ.13500
  34. GRB 120722A: Xinglong TNT optical afterglow candidate
  35. GRB 120722A: Swift detection of a burst
  36. GRB 120716A: Fermi GBM observation
  37. GRB 120716A: EVLA Detection
  38. GRB 120716A: Swift-XRT detection
  39. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  40. GRB 120716A: Redshift confirmation from VLT/X-shooter
  41. VLT/FORS2 redshift of GRB120716A
  42. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  43. GRB 120716A: Typo correction in GCN 13490
  44. GRB 120716A: Optical decay from NOT
  45. GRB 120716A: Candidate Optical Afterglow from PTF
  46. Konus-Wind observation of GRB 120716A
  47. IPN Triangulation of unusual GRB 120716A
  48. Fermi GBM trigger 120716.498 is not a GRB
  49. GRB 120711A: ATCA 34GHz final observations (upper limit)
  50. GRB 120714B: Swift/UVOT Detection
  51. GRB 120714B: Swift-XRT refined Analysis
  52. GRB120714A: Swift/UVOT upper limits
  53. GRB 120714B: Swift-BAT refined analysis
  54. GRB 120714A: GROND upper limits
  55. GRB 120714B: GROND confirmation of fading afterglow
  56. GRB 120714B: Redshift from VLT/X-shooter
  57. GRB 120714A: Swift-XRT refined Analysis
  58. GRB 120624B: VLA Observations
  59. GRB 120714B: Position Correction and Candidate Optical Afterglow
  60. GRB 120714A: Swift-BAT refined analysis
  61. GRB 120714B: Swift detection of a burst
  62. GRB 120714A: Enhanced Swift-XRT position
  63. GRB 120712A: Fermi GBM observation
  64. GRB 120711A: INTEGRAL/SPI observations
  65. GRB 120714A: Swift-XRT observations
  66. GRB120711B: MITSuME Ishigakijima upper limits
  67. GRB 120714A: Swift detection of a burst
  68. GRB 120711A: ATCA 34GHz further observations (upper limit)
  69. IPN Triangulation of GRB 120709A
  70. GRB 120712A: Swift/UVOT Detection
  71. GRB 120712A: VLT/Xshooter redshift
  72. GRB 120712A: Swift-XRT refined Analysis
  73. GRB 120712A Gemini-S redshift
  74. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  75. GRB 120712A: Enhanced Swift-XRT position
  76. GRB 120712A: Swift-BAT refined analysis
  77. GRB 120712A: Swift detection of a burst with optical afterglow
  78. GRB 120711B: Swift-XRT refined Analysis
  79. GRB 120711A: Fermi LAT Detection
  80. GRB 120711A: ATCA 34GHz upper limit
  81. GRB 120711B: Swift-BAT refined analysis
  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: Fermi GBM observation
  94. GRB 120711A: MAXI/GSC detection
  95. GRB 120711A: a possible X-ray transient
  96. GRB 120711A: an bright long GRB detected with INTEGRAL
  97. Continued Skynet/PROMPT observations of GRB120711A
  98. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  99. Swift detection of GRB 120711B or a new Galactic transient
  100. GRB 120709A: Fermi GBM detection

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