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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"

36338 results found.

  1. GRB 120510A: MASTER follow up observations
  2. GRB 120510A: MAXI/GSC detection of a burst
  3. GRB 120422A: SN identification from GTC
  4. GRB 120422A: P200 NIR detection
  5. GRB 120422A: CARMA 3mm observations
  6. GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN
  7. GRB 120422A: Gemini-N detection of a supernova
  8. GRB 120422A: i-band re-brightening and possible SN detection
  9. GRB 120427A: MASTER follow up observations
  10. GRB 120422A: optical observations
  11. Konus-Wind observation of GRB 120427A
  12. IPN Triangulation of GRB 120427A
  13. GRB 120422A, the review of the sky area in plate archives
  14. Konus-Wind observation of GRB 120426A
  15. GRB 120422A: Additional Gemini observations and Keck/LRIS spectroscopy
  16. IPN Triangulation of bright GRB 120426A
  17. GRB 120422A: MITSuME Ishigakijima upper limit
  18. Swift Trigger 520928 is probably not a burst
  19. GRB 120424A: MAXI/GSC detection of a burst
  20. GRB 120422A: 272 GHz observations from SMA
  21. GRB 120422A: JCMT SCUBA-2 sub-mm observation
  22. GRB 120422A: RAPTOR Limits During Gamma-ray Emitting Interval
  23. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  24. GRB 120422A GROND observations
  25. GRB 120422A: Super-LOTIS early observations
  26. GRB 120422A: EVLA Detection
  27. GRB 120422A: Xinglong TNT optical upper limit
  28. GRB 120422A: NOT optical observations
  29. GRB 120422A: Gemini redshift of candidate host
  30. GRB 120422A: Zadko observatory - Gingin optical observations
  31. GRB 120422A: Swift-XRT refined Analysis
  32. GRB 120422A: A Swift/UVOT Detection
  33. GRB 120422A: Enhanced Swift-XRT position
  34. GRB 120422A: Swift-BAT refined analysis
  35. GRB 120422A: Gemini observations
  36. GRB 120422A: Faulkes Telescope North observations
  37. GRB 120422A: Swift detection of a burst
  38. GRB 120419A: Swift-XRT and UVOT observations
  39. GRB 120419A: A long GRB detected by INTEGRAL
  40. GRB 120404A: optical observations in Mondy observatory
  41. GRB 120404A: optical observations
  42. GRB 120404A, Optical Observations
  43. GRB 120404A: JCMT SCUBA-2 sub-mm observation
  44. GRB 120404A: SMARTS optical/IR observations
  45. GRB 120404A: EVLA Detection
  46. GRB 120404A: MASTER OT observations
  47. GRB120404A: GROND observations show steeply decaying afterglow
  48. GRB 120404A: VLT/X-shooter redshift confirmation
  49. GRB 120404A: Swift/UVOT Detection
  50. GRB 120404A: MITSuME Ishigakijima Optical Observation
  51. GRB 120404A: MITSuME Okayama Optical Observation
  52. GRB 120403B: Swift-XRT refined Analysis
  53. GRB 120404A: Swift-XRT refined Analysis
  54. GRB 120404A : TNT optical observation
  55. GRB 120404A: Swift-BAT refined analysis
  56. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  57. GRB 120404A: Enhanced Swift-XRT position
  58. GRB 120404A: Gemini-N Redshift correction
  59. GRB 120402B: MASTER early OT limit
  60. GRB 120403B: TAROT La Silla observatory optical observations
  61. GRB 120403B: Fermi GBM Observation
  62. GRB 120404A: Gemini-N Redshift
  63. GRB 120403B: AAT nIR observations
  64. GRB 120404A: MITSuME Akeno Optical upper limits
  65. GRB 120404A: MASTER early OT limit
  66. GRB 120404A: Faulkes Telescope North afterglow confirmation
  67. GRB 120404A: Swift detection of a burst with an optical counterpart
  68. GRB 120403B: Swift-BAT refined analysis
  69. GRB 120403B: Swift/UVOT Upper Limits
  70. GRB 120403B: Enhanced Swift-XRT position
  71. GRB 120403A: Swift/BAT spectral lag analysis
  72. GRB 120403B: Swift detection of a burst
  73. BAT trigger 519207 was a burst from Cyg X-1, was not GRB 120402A
  74. GRB 120326A, the review of the sky area in plate archives
  75. GRB 120402A: optical upper limit
  76. GRB 120320A: optical upper limit in Mondy observatory
  77. GRB 120320A: early optical upper limit
  78. GRB 120403A: MASTER follow up observations
  79. GRB 120402A: MASTER follow up observations
  80. GRB 120403A, Swift-BAT refined analysis
  81. GRB 120402B: Fermi GBM detection
  82. GRB 120328B: Pi of the Sky simultaneous upper limits
  83. GRB 120326A: Bassano Bresciano Observatory - correction for GCN Cir 13178
  84. GRB 120403A: Swift detection of a burst
  85. GRB 120402A: Swift detection of a possible burst or noise
  86. GRB 120326A: Cima Rest and Bassano Brescia
  87. GRB 120327A: SMARTS optical/IR afterglow observations
  88. GRB 120401A: Swift-XRT refined Analysis
  89. GRB 120401A: Swift-BAT refined analysis
  90. GRB 120326A: HCT optical observations
  91. GRB 120401A: Enhanced Swift-XRT position
  92. GRB 120401A: Prompt enhanced Swift-XRT position
  93. GRB 120401A: Swift detection of a burst
  94. GRB 120326A: EVLA Observations
  95. GRB 120324A: CrAO optical upper limit
  96. GRB 120326A: Bassano Bresciano Observatory lightcurve analisis
  97. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  98. GRB 120326A : Suzaku WAM observation of the prompt emission
  99. GRB 120326A: CARMA 3mm detection
  100. GRB 120324A, the review of the sky area in plate archives

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