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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"

42478 results found.

  1. GRB 120807A: Swift-BAT refined analysis
  2. GRB 120807A: Enhanced Swift-XRT position
  3. GRB 120807A: Swift detection of a burst
  4. GRB 120804A: ATCA 34GHz upper limit
  5. Fermi/GBM detection of an SGR-like burst
  6. GRB 120805A: Swift/UVOT Upper Limits
  7. Swift trigger 530214: uncertain if real or not
  8. Swift-BAT trigger 529813 is due to noise while entering the SAA
  9. GRB 120728A: Fermi GBM observation
  10. GRB 120805A: Swift-BAT refined analysis
  11. GRB 120805A: Swift-XRT refined Analysis
  12. GRB 120805A: 1.23m CAHA observations
  13. GRB 120805A: TAROT Calern observatory optical observations
  14. GRB 120805A: Swift detection of a burst
  15. GRB 120804A: EVLA Detection
  16. GRB 120804A: Gemini-North observations
  17. GRB 120804A: MITSuME Okayama Optical upper limits
  18. GRB 120803B: Swift-XRT refined Analysis
  19. GRB 120804A: Swift/UVOT Upper Limits
  20. GRB 120804A: Swift-BAT refined analysis
  21. GRB 120804A: Swift-XRT refined Analysis
  22. GRB 120804A: GROND upper limits
  23. GRB 120802A: EVLA Observations
  24. GRB 120804A: Enhanced Swift-XRT position
  25. Erratum of subject line of GCN13570 (GRB 120803A => GRB 120803B)
  26. GRB 120803B: MITSuME Okayama Optical upper limits
  27. GRB 120803A: MITSuME Okayama Optical upper limits
  28. GRB 120804A: Swift detection of a short burst
  29. GRB 120803B: Swift-BAT refined analysis
  30. GRB 120803B: Enhanced Swift-XRT position
  31. GRB 120803B: MITSuME Akeno Optical upper limits
  32. GRB 120803A: Swift-XRT Observations
  33. GRB 120803A: Swift-BAT refined analysis
  34. GRB 120803B: FTN possible afterglow candidate
  35. GRB 120803B: Swift detection of a burst
  36. GRB 120803A: Swift detection of a possible burst
  37. GRB 120802A: GRT Optical Observation
  38. GRB 120802A: Swift-XRT refined Analysis
  39. GRB 120802A Gemini-N redshift
  40. GRB 120802A: APEX/LABOCA submm observations
  41. GRB 120729A: Fermi GBM observation
  42. GRB 120802A: Swift-BAT refined analysis
  43. GRB 120802A: Enhanced Swift-XRT position
  44. GRB 120802A: MASTER optical observations
  45. GRB 120802A: optical uper limit in ISON-NM observatory
  46. GRB 120802A: Swift detection of a burst
  47. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  48. GRB 120728B: Fermi GBM detection
  49. Konus-Wind observation of GRB 120728B
  50. GRB 120729A: break in the optical light curve
  51. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  52. GRB 120729A: RTT150 optical observations
  53. GRB 120729A: EVLA Observations
  54. Virtual Telescope observations of GRB 120729A
  55. GRB 120729A: Early RAPTOR Observations
  56. T100 observations of GRB 120729A
  57. GRB 120728A: GROND Afterglow discovery
  58. GRB 120729A: Swift-XRT refined Analysis
  59. Correction to Swift GCN Circular 13538
  60. GRB 120729A: Swift/UVOT Detection
  61. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  62. GRB 120729A: Xinglong TNT optical upper limit
  63. GRB 120729A, Swift-BAT refined analysis
  64. GRB 120728A, Swift-BAT refined analysis
  65. GRB 120729A: Enhanced Swift-XRT position
  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. GRB 120728A: Enhanced Swift-XRT position
  71. Trigger 529076: Swift possible detection of SwJ1910.2-0546
  72. GRB 120728A: GROND observations
  73. GRB 120728A: Swift detection of a burst
  74. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  75. GRB 120716A: optical observation in Maidanak observatory
  76. Swift Trigger 528925 is probably a noise fluctuation
  77. GRB 120722A: optical upper limit
  78. GRB 120724A: optical observation in Maidanak observatory
  79. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  80. GRB 120716A: optical observation in CrAO
  81. GRB 120724A, Swift-BAT refined analysis
  82. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  83. GRB 120724A: Enhanced Swift-XRT position
  84. GRB 120724A: Swift-XRT refined Analysis
  85. GRB120711A: Planned XMM-Newton observation
  86. GRB 120724A: FTN optical afterglow candidate
  87. GRB 120724A: Swift detection of a burst
  88. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  89. GRB 120722A: Swift/UVOT Upper Limits
  90. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  91. GRB 120722A: GROND detection of the afterglow
  92. GRB 120722A: 1.5m OSN I-band observations
  93. GRB 120722A: Swift-XRT refined Analysis
  94. GRB 120722A: Swift-BAT refined analysis
  95. GRB 120722A: Enhanced Swift-XRT position
  96. GRB 120722A: Correction for GCN circ.13500
  97. GRB 120722A: Xinglong TNT optical afterglow candidate
  98. GRB 120722A: Swift detection of a burst
  99. GRB 120716A: Fermi GBM observation
  100. GRB 120716A: EVLA Detection

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