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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"

27617 results found.

  1. Improved IPN error box for short hard GRB 120811B
  2. GRB 120811C: RTT150 optical observations
  3. GRB 120811C: TAROT Calern observatory optical observations
  4. GRB 120811C: Swift detection of a burst with an optical counterpart
  5. IPN Triangulation of short hard GRB 120811B
  6. Trigger 530588: Swift detection of XMM J174457-2850.3
  7. Swift Trigger 530581: GRB 120811A or a galactic transient
  8. GRB 120807A: Swift/UVOT Upper Limits
  9. GRB 120803A: Confirmation of the X-ray afterglow
  10. GRB 120804A: Konus-Wind and Swift/BAT joint spectral analysis
  11. GRB 120714B: GROND/FORS2 detection of a supernova
  12. Swift Trigger 530441 is a false trigger
  13. GRB 120807A: Swift-XRT refined Analysis
  14. GRB 120807A: Fermi/LAT upper limit
  15. GRB 120807A: RAPTOR Limits During Gamma-Ray Emitting Interval
  16. GRB 120804A: Gemini-North detection of an optical afterglow and putative host galaxy
  17. GRB 120807A: TAROT La Silla observatory optical observations
  18. GRB 120807A: Swift-BAT refined analysis
  19. GRB 120807A: Swift detection of a burst
  20. Fermi/GBM detection of an SGR-like burst
  21. Swift-BAT trigger 530214 is noise
  22. GRB 120805A: Swift/UVOT Upper Limits
  23. Swift trigger 530214: uncertain if real or not
  24. Swift-BAT trigger 529813 is due to noise while entering the SAA
  25. GRB 120728A: Fermi GBM observation
  26. GRB 120805A: Swift-BAT refined analysis
  27. GRB 120802A: Swift/UVOT Upper Limits
  28. GRB 120805A: Swift-XRT refined Analysis
  29. GRB 120805A: TAROT Calern observatory optical observations
  30. GRB 120805A: Swift detection of a burst
  31. GRB 120804A: EVLA Detection
  32. GRB 120804A: Gemini-North observations
  33. GRB 120804A: Swift-BAT Spectral lag analysis
  34. GRB 120803B: Swift-XRT refined Analysis
  35. GRB 120804A: Swift/UVOT Upper Limits
  36. GRB 120804A: Swift-BAT refined analysis
  37. GRB 120804A: Swift-XRT refined Analysis
  38. GRB 120804A: GROND upper limits
  39. GRB 120804A: Swift detection of a short burst
  40. GRB 120803B: Swift-BAT refined analysis
  41. GRB 120803A: Swift-XRT Observations
  42. GRB 120803A: Swift-BAT refined analysis
  43. GRB 120803B: FTN possible afterglow candidate
  44. GRB 120803B: Swift detection of a burst
  45. GRB 120803A: Swift detection of a possible burst
  46. GRB 120802A: GRT Optical Observation
  47. GRB 120802A: Swift-XRT refined Analysis
  48. GRB 120729A: Fermi GBM observation
  49. GRB 120802A: Swift-BAT refined analysis
  50. GRB 120802A: optical uper limit in ISON-NM observatory
  51. GRB 120802A: Swift detection of a burst
  52. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  53. GRB 120728B: Fermi GBM detection
  54. IPN Triangulation of GRB 120728B (long/intense)
  55. GRB 120729A: RTT150 optical observations
  56. GRB 120729A: Early RAPTOR Observations
  57. GRB 120729A: UKIRT Observation
  58. T100 observations of GRB 120729A
  59. GRB 120728A: GROND Afterglow discovery
  60. GRB 120729A: Swift-XRT refined Analysis
  61. Correction to Swift GCN Circular 13538
  62. GRB 120729A: Swift/UVOT Detection
  63. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  64. GRB 120729A, Swift-BAT refined analysis
  65. GRB 120728A, Swift-BAT refined analysis
  66. GRB 120728A: Swift/UVOT Upper Limits
  67. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  68. GRB 120729A: Swift detection of a burst with an optical afterglow
  69. GRB 120728A: Swift-XRT refined Analysis
  70. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  71. GRB 120728A: GROND observations
  72. GRB 120728A: Swift detection of a burst
  73. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  74. Swift Trigger 528925 is probably a noise fluctuation
  75. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  76. GRB 120724A, Swift-BAT refined analysis
  77. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  78. GRB 120724A: Swift-XRT refined Analysis
  79. GRB 120724A: FTN optical afterglow candidate
  80. GRB 120724A: Swift detection of a burst
  81. GRB 120722A: Swift/UVOT Upper Limits
  82. GRB 120722A: GROND detection of the afterglow
  83. GRB 120722A: Swift-XRT refined Analysis
  84. GRB 120722A: Swift-BAT refined analysis
  85. GRB 120722A: Swift detection of a burst
  86. GRB 120716A: Fermi GBM observation
  87. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  88. VLT/FORS2 redshift of GRB120716A
  89. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  90. GRB 120716A: Optical decay from NOT
  91. GRB 120716A: Candidate Optical Afterglow from PTF
  92. IPN Triangulation of unusual GRB 120716A
  93. Fermi GBM trigger 120716.498 is not a GRB
  94. GRB 120714B: Swift/UVOT Detection
  95. GRB 120714B: Swift-XRT refined Analysis
  96. GRB120714A: Swift/UVOT upper limits
  97. GRB 120714B: Swift-BAT refined analysis
  98. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  99. GRB 120714A: GROND upper limits
  100. GRB 120714B: GROND confirmation of fading afterglow

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