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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"

15361 results found.

  1. GRB 120602A: Suzaku WAM observation of the prompt emission
  2. Konus-Wind observation of GRB 120617A
  3. Konus-Wind observation of GRB 120602A
  4. GRB 120612A: optical observations
  5. GRB 120603A: Suzaku WAM observation of the prompt emission
  6. Konus-Wind observation of GRB 120603A
  7. Konus-Wind observation of GRB 120528B
  8. GRB 120519A: Suzaku WAM observation of the prompt emission
  9. GRB 120521C redshift estimate
  10. GRB 120512A: Suzaku WAM observation of the prompt emission
  11. Konus-Wind observation of GRB 120522A
  12. GRB 120521B: Fermi GBM observation
  13. GRB 120521C: Early Tautenburg limits
  14. GRB 120521A: GROND Upper limits
  15. GRB 120521B: GROND Upper limits
  16. GRB 120521A: XRT light curve (Correction to GCN 13326)
  17. GRB 120521C: PAIRITEL NIR Upper Limits
  18. Konus-Wind observation of GRB 120519A
  19. GRB 120514A : Suzaku WAM observation of the prompt emission
  20. GRB 120512A: A long GRB detected by INTEGRAL
  21. Konus-Wind observation of GRB 120510A
  22. GRB 120514A: Swift detection of a burst
  23. Fermi GBM Trigger 358364818 is not a GRB
  24. Fermi Trigger 358364818: BOOTES-4 observations
  25. GRB 120510A: Swift XRT and UVOT observations
  26. GRB 120422A: SN identification from GTC
  27. GRB 120422A: Gemini-N detection of a supernova
  28. Konus-Wind observation of GRB 120427A
  29. Konus-Wind observation of GRB 120426A
  30. GRB 120422A: MITSuME Ishigakijima upper limit
  31. GRB 120424A: MAXI/GSC detection of a burst
  32. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  33. GRB 120422A GROND observations
  34. GRB 120422A: NOT optical observations
  35. GRB 120422A: Gemini redshift of candidate host
  36. GRB 120404A: optical observations
  37. GRB 120404A: MASTER OT observations
  38. GRB120404A: MOA optical observations of the initial rise afterglow
  39. GRB 120404A: VLT/X-shooter redshift confirmation
  40. GRB 120404A: Swift/UVOT Detection
  41. GRB 120404A: MITSuME Ishigakijima Optical Observation
  42. GRB 120404A: MITSuME Okayama Optical Observation
  43. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  44. GRB 120403B: Fermi GBM Observation
  45. GRB 120328B: Pi of the Sky simultaneous upper limits
  46. GRB 120324A: CrAO optical upper limit
  47. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  48. GRB 120326A : Suzaku WAM observation of the prompt emission
  49. Swift trigger 518853 is most likely GX 301-2
  50. GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
  51. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  52. Swift trigger 518853: MASTER-ICATE possible OT
  53. Trigger 518853: Swift detection of a probable Galactic transient
  54. GRB 120328B: Fermi-LAT Observations
  55. Konus-Wind observation of GRB 120328B
  56. GRB 120327A: MITSuME Ishigakijima Optical Observation
  57. GRB 120326A: MITSuME Ishigakijima Optical Observation
  58. GRB 120327A: NOT optical observations
  59. GRB 120327A: GTC redshift confirmation
  60. GRB 120326A: PAIRITEL NIR Observations
  61. GRB 120327A: CQUEAN grizY Observation
  62. GRB 120327A: Swift/UVOT further analysis
  63. GRB 120327A: REM NIR and optical observations
  64. Skynet/PROMPT observations of GRB120327A
  65. GRB 120326A: CQUEAN grizY Observation
  66. Skynet/Dolomiti Observations of GRB120326A
  67. GRB 120326A: TAROT Calern observatory afterglow optical detection
  68. GRB 120323A: Fermi LAT observations
  69. Konus-Wind observation of GRB 120323A
  70. Konus-Wind observation of GRB 120324A
  71. GRB 120324A: GROND observations
  72. GRB 120324A: CQUEAN rizY Observation
  73. GRB 120324A: Swift/UVOT Upper Limits
  74. GRB 120316A : Suzaku WAM observation of the prompt emission
  75. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  76. GRB 120229A: Magellan observations and limit on an optical afterglow
  77. GRB 120320A: Swift/UVOT Upper Limits
  78. GRB 120320A: MITSuME Okayama Optical upper limits
  79. GRB 120320A: BOOTES-4 optical upper limit
  80. Konus-Wind observation of GRB 120316A
  81. IPN Triangulation of GRB 120316A
  82. GRB 120320A: MASTER optical observations
  83. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  84. GRB 120312A: Gemini and UKIRT imaging
  85. GRB 120311A: C88 optical limits
  86. GRB 120312A: MASTER-NET optical observations
  87. GROND observations of GRB 120311A
  88. GRB 120311A: Swift/UVOT Upper Limits
  89. GRB 120308A: Further PAIRITEL NIR Observations
  90. GRB120308A: MITSuME Ishigakijima Optical Upper Limits
  91. GRB 120308A: Swift/UVOT Detection
  92. GRB 120308A: PAIRITEL NIR observations
  93. GRB 120302A: Fermi GBM Observation
  94. GRB 120302A: Swift-BAT refined position and a possible XRT and UVOT counterpart
  95. GRB 120302A: GROND detection of an afterglow candidate
  96. GRB 111222A: Swift observation on 2012 February 06/07
  97. Konus-Wind observation of GRB 120226A
  98. GRB 120226A: Fermi-GBM and Fermi-LAT detections; LAT position retraction
  99. GRB 120226A: Fermi-LAT data analysis
  100. IPN Triangulation of GRB 120226A

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