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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"

15373 results found.

  1. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  2. GRB 120624B: Further analysis of the HAWKI observations
  3. GRB 120624B: Swift-XRT observations
  4. XRF 120626B: MAXI/GSC detection
  5. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  6. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  7. Konus-Wind observation of GRB 120624B
  8. GRB 120624A: Fermi GBM observation
  9. GRB 120624B: Fermi-LAT Detection
  10. Konus-Wind observation of GRB 120624A
  11. GRB 120624B: Fermi GBM detection
  12. Swift trigger 524642 / SwJ1910.2-0546
  13. GRB 120602A: Suzaku WAM observation of the prompt emission
  14. Konus-Wind observation of GRB 120617A
  15. Konus-Wind observation of GRB 120602A
  16. GRB 120612A: optical observations
  17. GRB 120603A: Suzaku WAM observation of the prompt emission
  18. Konus-Wind observation of GRB 120603A
  19. Konus-Wind observation of GRB 120528B
  20. GRB 120519A: Suzaku WAM observation of the prompt emission
  21. GRB 120521C redshift estimate
  22. GRB 120512A: Suzaku WAM observation of the prompt emission
  23. Konus-Wind observation of GRB 120522A
  24. GRB 120521B: Fermi GBM observation
  25. GRB 120521C: Early Tautenburg limits
  26. GRB 120521A: GROND Upper limits
  27. GRB 120521B: GROND Upper limits
  28. GRB 120521A: XRT light curve (Correction to GCN 13326)
  29. GRB 120521C: PAIRITEL NIR Upper Limits
  30. Konus-Wind observation of GRB 120519A
  31. GRB 120514A : Suzaku WAM observation of the prompt emission
  32. GRB 120512A: A long GRB detected by INTEGRAL
  33. Konus-Wind observation of GRB 120510A
  34. GRB 120514A: Swift detection of a burst
  35. Fermi GBM Trigger 358364818 is not a GRB
  36. Fermi Trigger 358364818: BOOTES-4 observations
  37. GRB 120510A: Swift XRT and UVOT observations
  38. GRB 120422A: SN identification from GTC
  39. GRB 120422A: Gemini-N detection of a supernova
  40. Konus-Wind observation of GRB 120427A
  41. Konus-Wind observation of GRB 120426A
  42. GRB 120422A: MITSuME Ishigakijima upper limit
  43. GRB 120424A: MAXI/GSC detection of a burst
  44. GRB 120422A: VLT/X-shooter spectroscopy of the GRB counterpart
  45. GRB 120422A GROND observations
  46. GRB 120422A: NOT optical observations
  47. GRB 120422A: Gemini redshift of candidate host
  48. GRB 120404A: optical observations
  49. GRB 120404A: MASTER OT observations
  50. GRB120404A: MOA optical observations of the initial rise afterglow
  51. GRB 120404A: VLT/X-shooter redshift confirmation
  52. GRB 120404A: Swift/UVOT Detection
  53. GRB 120404A: MITSuME Ishigakijima Optical Observation
  54. GRB 120404A: MITSuME Okayama Optical Observation
  55. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  56. GRB 120403B: Fermi GBM Observation
  57. GRB 120328B: Pi of the Sky simultaneous upper limits
  58. GRB 120324A: CrAO optical upper limit
  59. GRB 120326A: MITSuME Ishigakijima Optical Observation at 3 days afterthe burst
  60. GRB 120326A : Suzaku WAM observation of the prompt emission
  61. Swift trigger 518853 is most likely GX 301-2
  62. GRB 120326A: MITSuME Ishigakijima Optical Observation at 2 days afterthe burst
  63. GRB 120327A: MITSuME Ishigakijima Optical Upper Limits at 1 day afterthe burst
  64. Swift trigger 518853: MASTER-ICATE possible OT
  65. Trigger 518853: Swift detection of a probable Galactic transient
  66. GRB 120328B: Fermi-LAT Observations
  67. Konus-Wind observation of GRB 120328B
  68. GRB 120327A: MITSuME Ishigakijima Optical Observation
  69. GRB 120326A: MITSuME Ishigakijima Optical Observation
  70. GRB 120327A: NOT optical observations
  71. GRB 120327A: GTC redshift confirmation
  72. GRB 120326A: PAIRITEL NIR Observations
  73. GRB 120327A: CQUEAN grizY Observation
  74. GRB 120327A: Swift/UVOT further analysis
  75. GRB 120327A: REM NIR and optical observations
  76. Skynet/PROMPT observations of GRB120327A
  77. GRB 120326A: CQUEAN grizY Observation
  78. Skynet/Dolomiti Observations of GRB120326A
  79. GRB 120326A: TAROT Calern observatory afterglow optical detection
  80. GRB 120323A: Fermi LAT observations
  81. Konus-Wind observation of GRB 120323A
  82. Konus-Wind observation of GRB 120324A
  83. GRB 120324A: GROND observations
  84. GRB 120324A: CQUEAN rizY Observation
  85. GRB 120324A: Swift/UVOT Upper Limits
  86. GRB 120316A : Suzaku WAM observation of the prompt emission
  87. GRB 120316A: Fermi-GBM and Fermi-LAT Observations
  88. GRB 120229A: Magellan observations and limit on an optical afterglow
  89. GRB 120320A: Swift/UVOT Upper Limits
  90. GRB 120320A: MITSuME Okayama Optical upper limits
  91. GRB 120320A: BOOTES-4 optical upper limit
  92. Konus-Wind observation of GRB 120316A
  93. IPN Triangulation of GRB 120316A
  94. GRB 120320A: MASTER optical observations
  95. GBM trigger 353549464 (GRB 120316A?) : High-energy photon emission in Fermi/LAT data
  96. GRB 120312A: Gemini and UKIRT imaging
  97. GRB 120311A: C88 optical limits
  98. GRB 120312A: MASTER-NET optical observations
  99. GROND observations of GRB 120311A
  100. GRB 120311A: Swift/UVOT Upper Limits

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