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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"

45680 results found.

  1. GRB041006: RTT150 Optical Observations
  2. GRB041015 : Multi epoch optical observations
  3. HST Observations: XRF 040701 and 040812
  4. Bright bursts from SGR1806-20
  5. GRB 041016: BOOTES-2 simultaneous observation
  6. GRB041006: RTT150 Optical Observations
  7. GRB041016,optical observation
  8. GRB 041016: Optical limits
  9. GRB 041016: Optical limits in V, R, I
  10. GRB 041016:Optical limit during first minute
  11. GRB041016: MASTER: Optical observations
  12. GRB 041015: Optical Observations at Rikubetsu
  13. GRB041006: Near Infrared observations
  14. GRB 041016: Optical limit
  15. GRB 041015 R band observations
  16. GRB040924, BVRcIc field calibration
  17. GRB041015: MASTER: Optical observations
  18. GRB041015,optical observation
  19. GRB041006: Fading X-ray Afterglow Observed with Chandra
  20. GRB 041015: Optical limit at Osaka University
  21. GRB041015 : Optical follow-up at Kiso
  22. GRB 041015 - A long GRB detected by INTEGRAL
  23. GRB 041006 R observations in Loiano
  24. GRB041006: VLT observations of the afterglow and host galaxy
  25. GRB041006: Optical observations and Potential host galaxy
  26. GRB041006, BVRcIc field calibration
  27. GRB 040924: VLT spectroscopy
  28. GRB 041006: SARA afterglow observations
  29. GRB041006, optical observation in CrAO
  30. Search for SN light in XRF 040912 with MEGACAM
  31. GRB 040916: Afterglow Color at Early Times
  32. GRB 041006 Optical afterglow observations
  33. IBAS GRB Alert # 2010
  34. GRB 041006: BR observations with VATT
  35. GRB 041006: Redshift confirmed
  36. GRB041006: Liverpool Telescope optical observations
  37. GRB 041006: Colour measurement
  38. GRB041006: break in the light curve
  39. GRB 041006: Radio Observations
  40. GRB041006, further submilllimetre observations
  41. GRB 041006 : optical follow-up observation at Lulin Observatory
  42. GRB 041006 : Optical follow-up observation at TAROT
  43. GRB041006: Optical photometry and spectroscopy at TNG
  44. GRB 041006: presice astrometry
  45. GRB041006 (= H3570): Chandra Observations In Progress
  46. GRB 041006 : optical observation at Bisei
  47. GRB041006, optical I observation
  48. GRB041006 (=HETE3570): optical observations
  49. ROTSE-IIIa Observations of GRB 041006
  50. GRB041006, optical observation
  51. GRB041006, submillimetre observations
  52. GRB041006: MASTER optical observations
  53. GRB041006,optical observation
  54. GRB 041006: Optical decay
  55. GRB 041006 (=H3570): An X-Ray Rich GRB Localized in Real Time by HETE
  56. Konus-Wind observation of a series SGR 1806-20 bursts on 041005
  57. GRB041006: Fading of optical afterglow candidate
  58. GRB 041006: Finding chart
  59. GRB 041006: Optical afterglow candidate
  60. Bursts from SGR 1806-20: Preliminary INTEGRAL results
  61. Very strong outburst from SGR 1806-20 detected with INTEGRAL
  62. XRF 020903: Observations of the Host Galaxy (authors)
  63. XRF 020903: Observations of the Host Galaxy
  64. GRB 040924: Second Epoch WSRT Radio Observations
  65. radio observations, GRB 040924
  66. IBAS Alert 1991. Not a real GRB
  67. GRB040929,optical observation
  68. GRB040929: MASTER optical observations
  69. Konus-Wind and Helicon-Coronas-F observations of GRB040924
  70. GRB040924,optical observation
  71. GRB040924, RTT150 optical observation
  72. GRB040924,optical observation
  73. GRB 040924: detection of possible host galaxy by Subaru
  74. GRB040924, RTT150 optical observation
  75. GRB040924: KAIT observations
  76. GRB040924: Afterglow magnitude at t=17.5hr
  77. GRB 040924: WSRT Radio Observations
  78. GRB 040924: NIR finding chart
  79. GRB040924 : Optical candidate observations at Lulin observatory
  80. GRB040924 : Optical candidate observations at Lulin observatory
  81. GRB 040924: Subaru NIR observation
  82. GRB040924: Optical afterglow properties
  83. GRB 040924: RTT150 optical observations
  84. GRB 040924, optical follow-up
  85. GRB040924: MASTER: OT decay
  86. GRB040924: MASTER Optical observations
  87. IPN triangulation of GRB040924 (H3564)
  88. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  89. GRB040924 (H3564): Optical afterglow candidate
  90. XRF 040912: Radio Observations
  91. XRF 040916: Radio Observations
  92. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  93. XRF040916: continuing decay of OT
  94. TAROT Observations of GRB 040916 (HETE #3558)
  95. GRB040912(=H3557): Candidate Optical Afterglow
  96. XRF040916, optical observations
  97. XRF040916: Optical Transient Candidate by Subaru
  98. GRB040916 optical limits 17 min after GRB
  99. XRF 040912, identification of CXO sources
  100. XRF 040912 (=H3557): Spectral and Temporal Properties

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