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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"

39298 results found.

  1. GRB041006, late-time optical photometry
  2. IBAS GRB Alert # 2034
  3. GRB041006: RTT150 Optical Observations
  4. Bright bursts from SGR1806-20
  5. GRB 041016: BOOTES-2 simultaneous observation
  6. GRB041006: RTT150 Optical Observations
  7. GRB 041016: Optical limits
  8. GRB 041016: Optical limits in V, R, I
  9. GRB 041016:Optical limit during first minute
  10. GRB041016: MASTER: Optical observations
  11. GRB 041015: Optical Observations at Rikubetsu
  12. GRB041006: Near Infrared observations
  13. GRB 041016: Optical limit
  14. GRB 041015 R band observations
  15. GRB040924, BVRcIc field calibration
  16. GRB041015: MASTER: Optical observations
  17. GRB041015,optical observation
  18. GRB 041015: Optical limit at Osaka University
  19. GRB041015 : Optical follow-up at Kiso
  20. GRB 041015 - A long GRB detected by INTEGRAL
  21. GRB 041006 R observations in Loiano
  22. GRB041006: VLT observations of the afterglow and host galaxy
  23. GRB041006: Optical observations and Potential host galaxy
  24. GRB041006, BVRcIc field calibration
  25. GRB 040924: VLT spectroscopy
  26. GRB 041006: SARA afterglow observations
  27. Search for SN light in XRF 040912 with MEGACAM
  28. GRB 040916: Afterglow Color at Early Times
  29. GRB 041006 Optical afterglow observations
  30. IBAS GRB Alert # 2010
  31. GRB 041006: BR observations with VATT
  32. GRB 041006: Redshift confirmed
  33. GRB041006: Liverpool Telescope optical observations
  34. GRB 041006: Colour measurement
  35. GRB041006: break in the light curve
  36. GRB 041006: Radio Observations
  37. GRB041006, further submilllimetre observations
  38. GRB 041006 : optical follow-up observation at Lulin Observatory
  39. GRB 041006 : Optical follow-up observation at TAROT
  40. GRB041006: Optical photometry and spectroscopy at TNG
  41. GRB 041006: presice astrometry
  42. GRB041006 (= H3570): Chandra Observations In Progress
  43. GRB 041006 : optical observation at Bisei
  44. GRB041006, optical I observation
  45. GRB041006 (=HETE3570): optical observations
  46. ROTSE-IIIa Observations of GRB 041006
  47. GRB041006, submillimetre observations
  48. GRB041006: MASTER optical observations
  49. GRB 041006: Optical decay
  50. GRB 041006 (=H3570): An X-Ray Rich GRB Localized in Real Time by HETE
  51. GRB 041006 : Optical follow-up observation at KISO
  52. GRB 041006: Finding chart
  53. GRB 041006: Optical afterglow candidate
  54. XRF 020903: Observations of the Host Galaxy (authors)
  55. GRB 040924: Second Epoch WSRT Radio Observations
  56. radio observations, GRB 040924
  57. IBAS Alert 1991. Not a real GRB
  58. GRB040929,optical observation
  59. GRB040924,optical observation
  60. GRB040924, RTT150 optical observation
  61. GRB 040924: detection of possible host galaxy by Subaru
  62. GRB040924, RTT150 optical observation
  63. GRB040924: KAIT observations
  64. GRB040924: Afterglow magnitude at t=17.5hr
  65. GRB 040924: WSRT Radio Observations
  66. GRB 040924: NIR finding chart
  67. GRB040924 : Optical candidate observations at Lulin observatory
  68. GRB040924 : Optical candidate observations at Lulin observatory
  69. GRB 040924: Subaru NIR observation
  70. GRB 040924: RTT150 optical observations
  71. GRB 040924, optical follow-up
  72. IPN triangulation of GRB040924 (H3564)
  73. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  74. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  75. XRF040916: continuing decay of OT
  76. TAROT Observations of GRB 040916 (HETE #3558)
  77. XRF040916, optical observations
  78. XRF040916: Optical Transient Candidate by Subaru
  79. GRB040916 optical limits 17 min after GRB
  80. XRF 040912 (=H3557): Spectral and Temporal Properties
  81. XRF040916, Ic observations
  82. XRF040912, BVRcIc field calibration
  83. XRF040916, BVRcIc field calibration
  84. GRB040916: Archival optical observations
  85. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  86. GRB040916: Optical observations
  87. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  88. GRB040912 (= H3557): Chandra Observations Scheduled
  89. GRB 040912: Optical Observations
  90. GRB/XRF040912,optical observations
  91. GRB 040912, BVRI observations
  92. Optical observations of GRB/XRF 040912 = HETE 3557
  93. An intense burst from SGR1806-20
  94. IBAS GRB Alerts 1978-1980
  95. Optical observations of field of GRB040912
  96. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  97. GRB 040827: XMM-Newton data
  98. GRB040903 - A XRF?
  99. GRB040827: analysis of the XMM-Newton observation
  100. GRB 040903 - INTEGRAL data analysis

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