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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"

42893 results found.

  1. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  2. GRB 120716A: optical observation in CrAO
  3. GRB 120724A, Swift-BAT refined analysis
  4. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  5. GRB 120724A: Enhanced Swift-XRT position
  6. GRB 120724A: Swift-XRT refined Analysis
  7. GRB 120724A: Gemini-N tentative redshift
  8. GRB 120724A: FTN optical afterglow candidate
  9. GRB 120724A: Swift detection of a burst
  10. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  11. GRB 120722A: Swift/UVOT Upper Limits
  12. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  13. GRB 120722A: GROND detection of the afterglow
  14. GRB 120722A: 1.5m OSN I-band observations
  15. GRB 120722A: Swift-XRT refined Analysis
  16. GRB 120722A: Swift-BAT refined analysis
  17. GRB 120722A: Enhanced Swift-XRT position
  18. GRB 120722A: Correction for GCN circ.13500
  19. GRB 120722A: Xinglong TNT optical afterglow candidate
  20. GRB 120722A: Swift detection of a burst
  21. GRB 120716A: Fermi GBM observation
  22. GRB 120716A: EVLA Detection
  23. GRB 120716A: Swift-XRT detection
  24. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  25. GRB 120716A: Redshift confirmation from VLT/X-shooter
  26. VLT/FORS2 redshift of GRB120716A
  27. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  28. GRB 120716A: Optical decay from NOT
  29. GRB 120716A: Candidate Optical Afterglow from PTF
  30. Konus-Wind observation of GRB 120716A
  31. IPN Triangulation of unusual GRB 120716A
  32. Fermi GBM trigger 120716.498 is not a GRB
  33. GRB 120711A: ATCA 34GHz final observations (upper limit)
  34. GRB 120714B: Swift-XRT refined Analysis
  35. GRB120714A: Swift/UVOT upper limits
  36. GRB 120714B: Swift-BAT refined analysis
  37. Swift-BAT refined analysis of 1E 1841-045 (Trigger=526660)
  38. GRB 120714A: GROND upper limits
  39. GRB 120714B: GROND confirmation of fading afterglow
  40. GRB 120714B: Redshift from VLT/X-shooter
  41. GRB 120714A: Swift-XRT refined Analysis
  42. Trigger 526660: Swift detection of 1 E 1841-045 (aka Kes 73)
  43. GRB 120624B: VLA Observations
  44. GRB 120714B: Position Correction and Candidate Optical Afterglow
  45. GRB 120714A: Swift-BAT refined analysis
  46. GRB 120714B: Swift detection of a burst
  47. GRB 120714A: Enhanced Swift-XRT position
  48. GRB 120712A: Fermi GBM observation
  49. GRB 120711A: INTEGRAL/SPI observations
  50. GRB120714A: UVOT non-detection
  51. GRB 120714A: Swift-XRT observations
  52. GRB 120714A: Swift detection of a burst
  53. GRB 120711A: ATCA 34GHz further observations (upper limit)
  54. IPN Triangulation of GRB 120709A
  55. GRB 120712A: Swift/UVOT Detection
  56. GRB 120712A: VLT/Xshooter redshift
  57. GRB 120712A: Swift-XRT refined Analysis
  58. GRB 120712A Gemini-S redshift
  59. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  60. GRB 120712A: Enhanced Swift-XRT position
  61. GRB 120712A: Swift-BAT refined analysis
  62. GRB 120712A: Swift detection of a burst with optical afterglow
  63. GRB 120711B: Swift-XRT refined Analysis
  64. GRB 120711A: Fermi LAT Detection
  65. GRB 120711A: ATCA 34GHz upper limit
  66. GRB 120711B: Swift-BAT refined analysis
  67. GRB 120711B: Swift/UVOT Upper Limits
  68. GRB 120711A: Swift/UVOT Observations
  69. GRB 120709A: Swift/UVOT Observations
  70. Konus-Wind observation of GRB 120711A
  71. GRB 120711A: Fermi LAT detection
  72. GRB 120711A: MASTER early OT detection
  73. GRB 120711A: Swift-XRT observations
  74. GRB 120711A Gemini-S likely redshift
  75. Konus-Wind observation of GRB 120709A
  76. GRB 120711A: REM NIR early time detection
  77. GRB 120711A: GROND photometric redshift
  78. GRB 120711A: Fermi GBM observation
  79. GRB 120711A: MAXI/GSC detection
  80. GRB 120711A: a possible X-ray transient
  81. GRB 120711A: an bright long GRB detected with INTEGRAL
  82. Continued Skynet/PROMPT observations of GRB120711A
  83. Swift detection of GRB 120711B or a new Galactic transient
  84. Skynet/PROMPT Observations of GRB120711A
  85. GRB 120709A: Fermi GBM detection
  86. GRB 120709A: Swift-XRT observations
  87. GRB 120709A: Matched filter analysis of Fermi-LAT data
  88. GRB 120709A: optical afterglow limits
  89. Konus-Wind observation of GRB 120707A
  90. IPN Triangulation of GRB 120707A
  91. GRB 120709A: Fermi-LAT Detection
  92. GRB 120707A: Fermi GBM Detection of a Bright Burst
  93. GRB 120624B: mm detection at PdBI
  94. GRB 120703A: SMARTS optical/IR observations
  95. GRB 120703A: Swift/UVOT Detection
  96. GRB 120703A: Fermi GBM detection
  97. GRB 120703A: Swift-XRT refined Analysis
  98. GRB 120703A: Enhanced Swift-XRT position
  99. GRB 120703A: Swift-BAT refined analysis
  100. GRB 120624B Suzaku WAM observation of the prompt emission

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