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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"

36276 results found.

  1. GRB 120802A: Swift-BAT refined analysis
  2. GRB 120802A: Enhanced Swift-XRT position
  3. GRB 120802A: MASTER optical observations
  4. GRB 120802A: optical uper limit in ISON-NM observatory
  5. GRB 120802A: Swift detection of a burst
  6. GRB 120729A: JCMT SCUBA-2 sub-mm observation
  7. GRB 120728B: Fermi GBM detection
  8. Konus-Wind observation of GRB 120728B
  9. GRB 120729A: break in the optical light curve
  10. GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
  11. IPN Triangulation of GRB 120728B (long/intense)
  12. GRB 120729A: RTT150 optical observations
  13. GRB 120729A: EVLA Observations
  14. Virtual Telescope observations of GRB 120729A
  15. GRB 120729A: Early RAPTOR Observations
  16. GRB 120729A: UKIRT Observation
  17. T100 observations of GRB 120729A
  18. GRB 120728A: GROND Afterglow discovery
  19. GRB 120729A: Swift-XRT refined Analysis
  20. GRB 120729A: Swift/UVOT Detection
  21. Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB
  22. GRB 120729A: Xinglong TNT optical upper limit
  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 Gemini-N redshift
  28. GRB120729A - Faulkes Telescope North Optical Afterglow Candidate
  29. GRB 120729A: Swift detection of a burst with an optical afterglow
  30. GRB 120728A: Swift-XRT refined Analysis
  31. GRB 120728A: Enhanced Swift-XRT position
  32. GRB 120728A: GROND observations
  33. GRB 120728A: Swift detection of a burst
  34. GRB 120727A/Galactic source: Fermi-LAT detection of a transient source
  35. GRB 120716A: optical observation in Maidanak observatory
  36. GRB 120722A: optical upper limit
  37. GRB 120724A: optical observation in Maidanak observatory
  38. GRB 120724A: JCMT SCUBA-2 sub-mm observation
  39. GRB 120716A: optical observation in CrAO
  40. GRB 120724A, Swift-BAT refined analysis
  41. GRB 120724A: Swift/UVOT Detection of the Optical Afterglow
  42. GRB 120724A: Enhanced Swift-XRT position
  43. GRB 120724A: Swift-XRT refined Analysis
  44. GRB 120724A: Gemini-N tentative redshift
  45. GRB 120724A: FTN optical afterglow candidate
  46. GRB 120724A: Swift detection of a burst
  47. GRB 120709A: Swift re-observation of the field of the X-ray counterpart candidate.
  48. GRB 120722A: Swift/UVOT Upper Limits
  49. GRB 120722A: VLT/X-shooter redshift of the host galaxy
  50. GRB 120722A: GROND detection of the afterglow
  51. GRB 120722A: 1.5m OSN I-band observations
  52. GRB 120722A: Swift-XRT refined Analysis
  53. GRB 120722A: Swift-BAT refined analysis
  54. GRB 120722A: Enhanced Swift-XRT position
  55. GRB 120722A: Correction for GCN circ.13500
  56. GRB 120722A: Xinglong TNT optical afterglow candidate
  57. GRB 120722A: Swift detection of a burst
  58. GRB 120716A: Fermi GBM observation
  59. GRB 120716A: EVLA Detection
  60. GRB 120716A: Swift-XRT detection
  61. GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
  62. GRB 120716A: Redshift confirmation from VLT/X-shooter
  63. VLT/FORS2 redshift of GRB120716A
  64. GRB 120716A: GROND confirmation of the optical/NIR afterglow
  65. GRB 120716A: Typo correction in GCN 13490
  66. GRB 120716A: Optical decay from NOT
  67. GRB 120716A: Candidate Optical Afterglow from PTF
  68. Konus-Wind observation of GRB 120716A
  69. IPN Triangulation of unusual GRB 120716A
  70. Fermi GBM trigger 120716.498 is not a GRB
  71. GRB 120711A: ATCA 34GHz final observations (upper limit)
  72. GRB 120714B: Swift/UVOT Detection
  73. GRB 120714B: Swift-XRT refined Analysis
  74. GRB120714A: Swift/UVOT upper limits
  75. GRB 120714B: Swift-BAT refined analysis
  76. GRB 120714A: GROND upper limits
  77. GRB 120714B: GROND confirmation of fading afterglow
  78. GRB 120714B: Redshift from VLT/X-shooter
  79. GRB 120714A: Swift-XRT refined Analysis
  80. GRB 120624B: VLA Observations
  81. GRB 120714B: Position Correction and Candidate Optical Afterglow
  82. GRB 120714A: Swift-BAT refined analysis
  83. GRB 120714B: Swift detection of a burst
  84. GRB 120714A: Enhanced Swift-XRT position
  85. GRB 120712A: Fermi GBM observation
  86. GRB 120711A: INTEGRAL/SPI observations
  87. GRB 120714A: Swift-XRT observations
  88. GRB120711B: MITSuME Ishigakijima upper limits
  89. GRB 120714A: Swift detection of a burst
  90. GRB 120711A: ATCA 34GHz further observations (upper limit)
  91. IPN Triangulation of GRB 120709A
  92. GRB 120712A: Swift/UVOT Detection
  93. GRB 120712A: VLT/Xshooter redshift
  94. GRB 120712A: Swift-XRT refined Analysis
  95. GRB 120712A Gemini-S redshift
  96. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  97. GRB 120712A: Enhanced Swift-XRT position
  98. GRB 120712A: Swift-BAT refined analysis
  99. GRB 120712A: Swift detection of a burst with optical afterglow
  100. GRB 120711B: Swift-XRT refined Analysis

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