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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"

21968 results found.

  1. GRB 061019: REM K-band candidate afterglow
  2. GRB061019: Swift/XRT position
  3. GRB 060825: GORT Observations
  4. GRB 061007: Second Epoch ATCA Radio Observations
  5. GRB 061006: astrometry-corrected XRT position
  6. GRB 061007: ATCA Radio Observations
  7. GRB061007: Swift UVOT followup observations
  8. GRB 061006: optical afterglow
  9. GRB 061007: Magellan Spectroscopy
  10. GRB 061006: Swift/UVOT optical observations
  11. GRB 061007 - FTS early brightening and power law decay
  12. GRB 061007 - Faulkes Telescope South Afterglow Confirmation
  13. GRB 061007: ROTSE-III Detection of Optical Counterpart
  14. GRB 061006: VLT observation
  15. GRB 061006: Swift-BAT refined analysis of the short-hard burst
  16. GRB061006: Faulkes Telescope South Observations
  17. GRB 061004: Las Campanas Optical/NIR Observations
  18. GRB061004: Swift/UVOT optical observations
  19. GRB 061004: Nearby 2MASS Galaxy
  20. GRB 060928: Swift observations
  21. GRB061002: Swift UVOT followup observations
  22. VLA observations of GRB 060926
  23. GRB061002 - SDSS Pre-Burst Observations
  24. GRB061002: MASTER-VWF-Kislovodsk observations
  25. GRB 060908: Detection of a possible host
  26. GRB 060923A: Probable host galaxy in the R-band
  27. GRB 060807: Detection of a possible host galaxy
  28. GRB 060923A: VLA K-band Observations
  29. GRB 060930: Xinglong TNT optical observations
  30. GRB 060929: Swift/UVOT Optical Observations
  31. GRB 060929: TNG K-band observations
  32. GRB 060929: MASTER-VWF-Kislovodsk observations
  33. GRB 060929: BOOTES-IR & OSN observations
  34. Liverpool Telescope observations of GRB 060929
  35. GRB060908: optical observations
  36. GRB 060729: An update on the late-time Swift observations
  37. GRB060927: optical observations
  38. GRB 060927: Swift/UVOT Optical Observations
  39. GRB 060927: Xinglong TNT optical observations
  40. GRB 060927: Possible host galaxy (star?) in the SDSS
  41. GRB 060927 : Kiso optical observation
  42. GRB060927: Faulkes Telescope South observation
  43. GRB 060926: MASTER: first minutes decay
  44. GRB060927 - SDSS Pre-Burst Observations
  45. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  46. GRB 060927: Swift detection of a burst
  47. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  48. GRB 060926: OPTIMA-Burst -- further observations
  49. GRB 060923A: Radio Observations
  50. GRB 060912A: Redshift of probable host galaxy
  51. GRB 060926: BOOTES-IR observations
  52. GRB 060926: Watcher observations
  53. GRB 060923C: Gemini Observations and Afterglow Candidate
  54. GRB 060923C: VLT J-band observations
  55. GRB 060923C: Keck Observations
  56. GRB 060923A: Keck and Gemini Observations
  57. GRB 060923C: Xinglong TNT optical observations
  58. GRB060923C : Faulkes Telescope South optical limits
  59. GRB060923C: Faulkes Telescope North optical observations
  60. GRB 060923: Early Super-LOTIS Observations
  61. GRB 060923: UKIRT nIR observations - candidate afterglow
  62. GRB060923: Faulkes Telescope North optical observations
  63. GRB060923 - SDSS Pre-Burst Observations
  64. GRB 060923: KAIT observations
  65. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  66. GRB060919: Swift/UVOT optical observations
  67. GRB 060919 : Faulkes South Telescope Observations
  68. GRB 060919: TAROT optical observations
  69. GRB 060912A: Probable Host Galaxy
  70. GRB 060912: Redshift of nearby 2MASS galaxy
  71. GRB060912: optical observations
  72. GRB 060912B: Watcher observations
  73. GRB060912: Swift/UVOT Observations
  74. GRB060912: OPTIMA-Burst optical observations
  75. GRB 060912: Xinglong TNT optical observations
  76. GRB 060912: Swift detection of a burst with an optical afterglow
  77. GRB060906: Danish/DFOSC optical observations
  78. VLA observations of GRB 060908
  79. GRB 060908: redshift
  80. GRB 060908: Swift/UVOT Observations
  81. GRB 060908: Danish/DFOSC optical observations
  82. GRB 060908 - SDSS Pre-burst Observations
  83. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  84. GRB 060908: REM optical prompt observation
  85. GRB060904b optical detections (delayed report due to internet outage)
  86. GRB 060906: Swift-UVOT observations
  87. GRB 060906: FRAM observations - flash determination (airplane)
  88. GRB 060906: KAIT observations
  89. GRB 060906: Confirmation of P60 Optical Afterglow
  90. GRB 060906: observations with FRAM
  91. GRB 060906 (?): P60 Optical Afterglow Candidate
  92. GRB 060904A Milagro GeV/TeV Observations
  93. GRB060904b, optical observations
  94. GRB 060904b: SMARTS optical/IR afterglow observations
  95. GRB 060904B: RTT150 optical observations
  96. GRB060904A: Swift/UVOT optical observations
  97. GRB060904b: Optical observations with Swift/UVOT
  98. GRB 060904A: Suzaku-XIS and -HXD observation plan
  99. GRB 060904A: P60 Observations
  100. GRB 060904B: Optical observations at Crni Vrh

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