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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"

45902 results found.

  1. GRB041015 : Optical follow-up at Kiso
  2. GRB 041015 - A long GRB detected by INTEGRAL
  3. GRB 041006 R observations in Loiano
  4. GRB041006: VLT observations of the afterglow and host galaxy
  5. GRB041006: Optical observations and Potential host galaxy
  6. GRB041006, BVRcIc field calibration
  7. GRB 040924: VLT spectroscopy
  8. GRB 041006: SARA afterglow observations
  9. GRB041006, optical observation in CrAO
  10. Search for SN light in XRF 040912 with MEGACAM
  11. GRB 040916: Afterglow Color at Early Times
  12. GRB 041006 Optical afterglow observations
  13. IBAS GRB Alert # 2010
  14. GRB 041006: BR observations with VATT
  15. GRB 041006: Redshift confirmed
  16. GRB041006: Liverpool Telescope optical observations
  17. GRB 041006: Colour measurement
  18. GRB041006: break in the light curve
  19. GRB 041006: Radio Observations
  20. GRB041006, further submilllimetre observations
  21. GRB 041006 : optical follow-up observation at Lulin Observatory
  22. GRB 041006 : Optical follow-up observation at TAROT
  23. GRB041006: Optical photometry and spectroscopy at TNG
  24. GRB 041006: presice astrometry
  25. GRB041006 (= H3570): Chandra Observations In Progress
  26. GRB 041006 : optical observation at Bisei
  27. GRB041006, optical I observation
  28. GRB041006 (=HETE3570): optical observations
  29. ROTSE-IIIa Observations of GRB 041006
  30. GRB041006, optical observation
  31. GRB041006, submillimetre observations
  32. GRB041006: MASTER optical observations
  33. GRB041006,optical observation
  34. GRB 041006: Optical decay
  35. GRB 041006 (=H3570): An X-Ray Rich GRB Localized in Real Time by HETE
  36. Konus-Wind observation of a series SGR 1806-20 bursts on 041005
  37. GRB041006: Fading of optical afterglow candidate
  38. GRB 041006 : Optical follow-up observation at KISO
  39. GRB 041006: Finding chart
  40. GRB 041006: Optical afterglow candidate
  41. Bursts from SGR 1806-20: Preliminary INTEGRAL results
  42. Very strong outburst from SGR 1806-20 detected with INTEGRAL
  43. XRF 020903: Observations of the Host Galaxy (authors)
  44. XRF 020903: Observations of the Host Galaxy
  45. SGR 1806-20 still active
  46. GRB 040924: Second Epoch WSRT Radio Observations
  47. radio observations, GRB 040924
  48. IBAS Alert 1991. Not a real GRB
  49. GRB040929,optical observation
  50. GRB040929: MASTER optical observations
  51. Konus-Wind and Helicon-Coronas-F observations of GRB040924
  52. GRB040924,optical observation
  53. GRB040924, RTT150 optical observation
  54. GRB040924,optical observation
  55. GRB 040924: detection of possible host galaxy by Subaru
  56. GRB040924, RTT150 optical observation
  57. GRB040924: KAIT observations
  58. GRB040924: Afterglow magnitude at t=17.5hr
  59. GRB 040924: WSRT Radio Observations
  60. GRB 040924: NIR finding chart
  61. GRB040924 : Optical candidate observations at Lulin observatory
  62. GRB040924 : Optical candidate observations at Lulin observatory
  63. GRB 040924: Subaru NIR observation
  64. GRB040924: Optical afterglow properties
  65. GRB 040924: RTT150 optical observations
  66. GRB 040924, optical follow-up
  67. GRB040924: MASTER: OT decay
  68. GRB040924: MASTER Optical observations
  69. IPN triangulation of GRB040924 (H3564)
  70. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  71. GRB040924 (H3564): Optical afterglow candidate
  72. XRF 040912: Radio Observations
  73. XRF 040916: Radio Observations
  74. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  75. XRF040916: continuing decay of OT
  76. TAROT Observations of GRB 040916 (HETE #3558)
  77. GRB040912(=H3557): Candidate Optical Afterglow
  78. XRF040916, optical observations
  79. XRF040916: Optical Transient Candidate by Subaru
  80. GRB040916 optical limits 17 min after GRB
  81. XRF 040912, identification of CXO sources
  82. XRF 040912 (=H3557): Spectral and Temporal Properties
  83. XRF040916, Ic observations
  84. XRF040916: optical follow-up observations
  85. XRF040912, BVRcIc field calibration
  86. XRF040916, BVRcIc field calibration
  87. GRB040916: Archival optical observations
  88. XRF 040916, optical follow-up
  89. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  90. GRB040916: Optical observations
  91. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  92. GRB040916 (= H3558): Improved Localization from HETE WXM
  93. GRB040916 (= H3558): A Long XRF Localized by HETE
  94. GRB040912 (= H3557): Chandra Observations Scheduled
  95. GRB 040912: Optical Observations
  96. GRB/XRF040912,optical observations
  97. GRB 040912, BVRI observations
  98. Optical observations of GRB/XRF 040912 = HETE 3557
  99. An intense burst from SGR1806-20
  100. GRB040912 : Kiso Optical follow-up observation

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