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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"

28281 results found.

  1. GRB 120803B: Swift-BAT refined analysis
  2. GRB 120803B: Enhanced Swift-XRT position
  3. GRB 120803A: Swift-BAT refined analysis
  4. GRB 120803B: FTN possible afterglow candidate
  5. GRB 120803B: Swift detection of a burst
  6. GRB 120803A: Swift detection of a possible burst
  7. GRB 120802A: GRT Optical Observation
  8. GRB 120802A: Swift-XRT refined Analysis
  9. GRB 120802A: APEX/LABOCA submm observations
  10. GRB 120729A: Fermi GBM observation
  11. GRB 120802A: Swift-BAT refined analysis
  12. GRB 120802A: Enhanced Swift-XRT position
  13. GRB 120802A: MASTER optical observations
  14. GRB 120802A: optical uper limit in ISON-NM observatory
  15. GRB 120802A: Swift detection of a burst
  16. GRB 120728B: Fermi GBM detection
  17. GRB 120729A: RTT150 optical observations
  18. Virtual Telescope observations of GRB 120729A
  19. T100 observations of GRB 120729A
  20. GRB 120728A: GROND Afterglow discovery
  21. GRB 120729A: Swift-XRT refined Analysis
  22. GRB 120729A: Swift/UVOT Detection
  23. GRB 120729A, Swift-BAT refined analysis
  24. GRB 120728A, Swift-BAT refined analysis
  25. GRB 120729A: Enhanced Swift-XRT position
  26. GRB 120728A: Swift/UVOT Upper Limits
  27. GRB 120729A: Swift detection of a burst with an optical afterglow
  28. GRB 120728A: Swift-XRT refined Analysis
  29. GRB 120728A: Enhanced Swift-XRT position
  30. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  31. GRB 120728A: GROND observations
  32. GRB 120728A: Swift detection of a burst
  33. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  34. Swift Trigger 528925 is probably a noise fluctuation
  35. GRB 120722A: optical upper limit
  36. GRB 120724A: optical observation in Maidanak observatory
  37. GRB 120724A, Swift-BAT refined analysis
  38. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  39. GRB 120724A: Enhanced Swift-XRT position
  40. GRB 120724A: Swift-XRT refined Analysis
  41. GRB 120724A: FTN optical afterglow candidate
  42. GRB 120724A: Swift detection of a burst
  43. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  44. GRB 120722A: Swift/UVOT Upper Limits
  45. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  46. GRB 120722A: GROND detection of the afterglow
  47. GRB 120722A: 1.5m OSN I-band observations
  48. GRB 120722A: Swift-XRT refined Analysis
  49. GRB 120722A: Swift-BAT refined analysis
  50. GRB 120722A: Enhanced Swift-XRT position
  51. GRB 120722A: Swift detection of a burst
  52. GRB 120716A: Fermi GBM observation
  53. GRB 120716A: Swift-XRT detection
  54. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  55. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  56. GRB 120716A: Optical decay from NOT
  57. GRB 120716A: Candidate Optical Afterglow from PTF
  58. GRB 120714B: Swift/UVOT Detection
  59. GRB 120714B: Swift-XRT refined Analysis
  60. GRB120714A: Swift/UVOT upper limits
  61. GRB 120714B: Swift-BAT refined analysis
  62. GRB 120714A: GROND upper limits
  63. GRB 120714B: GROND confirmation of fading afterglow
  64. GRB 120714B: Redshift from VLT/X-shooter
  65. GRB 120714A: Swift-XRT refined Analysis
  66. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  67. GRB 120624B: VLA Observations
  68. GRB 120714A: Swift-BAT refined analysis
  69. GRB 120714B: Swift detection of a burst
  70. GRB 120714A: Enhanced Swift-XRT position
  71. GRB 120712A: Fermi GBM observation
  72. GRB 120711A: INTEGRAL/SPI observations
  73. GRB 120714A: Swift-XRT observations
  74. GRB120711B: MITSuME Ishigakijima upper limits
  75. GRB 120714A: Swift detection of a burst
  76. GRB 120712A: Swift/UVOT Detection
  77. GRB 120712A: VLT/Xshooter redshift
  78. GRB 120712A: Swift-XRT refined Analysis
  79. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  80. GRB 120712A: Enhanced Swift-XRT position
  81. GRB 120712A: Swift-BAT refined analysis
  82. GRB 120712A: Swift detection of a burst with optical afterglow
  83. GRB 120711B: Swift-XRT refined Analysis
  84. GRB 120711A: Fermi LAT Detection
  85. GRB 120711B: Swift-BAT refined analysis
  86. GRB 120711B: Swift/UVOT Upper Limits
  87. GRB 120711A: Swift/UVOT Observations
  88. GRB 120711A: Fermi LAT detection
  89. GRB 120711A: MASTER early OT detection
  90. GRB 120711A: Swift-XRT observations
  91. GRB 120711A: REM NIR early time detection
  92. GRB 120711A: GROND photometric redshift
  93. GRB 120711A: Fermi GBM observation
  94. GRB 120711A: an bright long GRB detected with INTEGRAL
  95. Continued Skynet/PROMPT observations of GRB120711A
  96. Swift detection of GRB 120711B or a new Galactic transient
  97. Skynet/PROMPT Observations of GRB120711A
  98. GRB 120709A: Fermi GBM detection
  99. GRB 120709A: Swift-XRT observations
  100. GRB 120709A: optical afterglow limits

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