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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"

27604 results found.

  1. GRB 120807A: Fermi/LAT upper limit
  2. GRB 120807A: RAPTOR Limits During Gamma-Ray Emitting Interval
  3. GRB 120804A: Gemini-North detection of an optical afterglow and putative host galaxy
  4. GRB 120807A: TAROT La Silla observatory optical observations
  5. GRB 120807A: Swift-BAT refined analysis
  6. GRB 120807A: Swift detection of a burst
  7. Fermi/GBM detection of an SGR-like burst
  8. Swift-BAT trigger 530214 is noise
  9. GRB 120805A: Swift/UVOT Upper Limits
  10. Swift trigger 530214: uncertain if real or not
  11. Swift-BAT trigger 529813 is due to noise while entering the SAA
  12. GRB 120728A: Fermi GBM observation
  13. GRB 120805A: Swift-BAT refined analysis
  14. GRB 120802A: Swift/UVOT Upper Limits
  15. GRB 120805A: Swift-XRT refined Analysis
  16. GRB 120805A: TAROT Calern observatory optical observations
  17. GRB 120805A: Swift detection of a burst
  18. GRB 120804A: EVLA Detection
  19. GRB 120804A: Gemini-North observations
  20. GRB 120804A: Swift-BAT Spectral lag analysis
  21. GRB 120803B: Swift-XRT refined Analysis
  22. GRB 120804A: Swift/UVOT Upper Limits
  23. GRB 120804A: Swift-BAT refined analysis
  24. GRB 120804A: Swift-XRT refined Analysis
  25. GRB 120804A: GROND upper limits
  26. GRB 120804A: Swift detection of a short burst
  27. GRB 120803B: Swift-BAT refined analysis
  28. GRB 120803A: Swift-XRT Observations
  29. GRB 120803A: Swift-BAT refined analysis
  30. GRB 120803B: FTN possible afterglow candidate
  31. GRB 120803B: Swift detection of a burst
  32. GRB 120803A: Swift detection of a possible burst
  33. GRB 120802A: GRT Optical Observation
  34. GRB 120802A: Swift-XRT refined Analysis
  35. GRB 120729A: Fermi GBM observation
  36. GRB 120802A: Swift-BAT refined analysis
  37. GRB 120802A: optical uper limit in ISON-NM observatory
  38. GRB 120802A: Swift detection of a burst
  39. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  40. GRB 120728B: Fermi GBM detection
  41. IPN Triangulation of GRB 120728B (long/intense)
  42. GRB 120729A: RTT150 optical observations
  43. GRB 120729A: Early RAPTOR Observations
  44. GRB 120729A: UKIRT Observation
  45. T100 observations of GRB 120729A
  46. GRB 120728A: GROND Afterglow discovery
  47. GRB 120729A: Swift-XRT refined Analysis
  48. Correction to Swift GCN Circular 13538
  49. GRB 120729A: Swift/UVOT Detection
  50. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  51. GRB 120729A, Swift-BAT refined analysis
  52. GRB 120728A, Swift-BAT refined analysis
  53. GRB 120728A: Swift/UVOT Upper Limits
  54. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  55. GRB 120729A: Swift detection of a burst with an optical afterglow
  56. GRB 120728A: Swift-XRT refined Analysis
  57. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  58. GRB 120728A: GROND observations
  59. GRB 120728A: Swift detection of a burst
  60. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  61. Swift Trigger 528925 is probably a noise fluctuation
  62. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  63. GRB 120724A, Swift-BAT refined analysis
  64. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  65. GRB 120724A: Swift-XRT refined Analysis
  66. GRB 120724A: FTN optical afterglow candidate
  67. GRB 120724A: Swift detection of a burst
  68. GRB 120722A: Swift/UVOT Upper Limits
  69. GRB 120722A: GROND detection of the afterglow
  70. GRB 120722A: Swift-XRT refined Analysis
  71. GRB 120722A: Swift-BAT refined analysis
  72. GRB 120722A: Swift detection of a burst
  73. GRB 120716A: Fermi GBM observation
  74. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  75. VLT/FORS2 redshift of GRB120716A
  76. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  77. GRB 120716A: Optical decay from NOT
  78. GRB 120716A: Candidate Optical Afterglow from PTF
  79. IPN Triangulation of unusual GRB 120716A
  80. Fermi GBM trigger 120716.498 is not a GRB
  81. GRB 120714B: Swift/UVOT Detection
  82. GRB 120714B: Swift-XRT refined Analysis
  83. GRB120714A: Swift/UVOT upper limits
  84. GRB 120714B: Swift-BAT refined analysis
  85. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  86. GRB 120714A: GROND upper limits
  87. GRB 120714B: GROND confirmation of fading afterglow
  88. GRB 120714A: Swift-XRT refined Analysis
  89. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  90. GRB 120714B: Position Correction and Candidate Optical Afterglow
  91. GRB 120714A: Swift-BAT refined analysis
  92. GRB 120714B: Swift detection of a burst
  93. GRB 120712A: Fermi GBM observation
  94. GRB120714A: UVOT non-detection
  95. GRB 120714A: Swift-XRT observations
  96. GRB 120714A: Swift detection of a burst
  97. GRB 120712A: Swift/UVOT Detection
  98. GRB 120712A: VLT/Xshooter redshift
  99. GRB 120712A: Swift-XRT refined Analysis
  100. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z

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