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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"

32689 results found.

  1. GRB 041016: Optical limits
  2. GRB 041015: Optical Observations at Rikubetsu
  3. GRB041006: Near Infrared observations
  4. GRB040924, BVRcIc field calibration
  5. GRB 041015: Optical limit at Osaka University
  6. GRB041015 : Optical follow-up at Kiso
  7. GRB 041006 R observations in Loiano
  8. GRB041006: VLT observations of the afterglow and host galaxy
  9. GRB041006: Optical observations and Potential host galaxy
  10. GRB041006, BVRcIc field calibration
  11. GRB 040924: VLT spectroscopy
  12. GRB 041006: SARA afterglow observations
  13. GRB041006, optical observation in CrAO
  14. Search for SN light in XRF 040912 with MEGACAM
  15. GRB 040916: Afterglow Color at Early Times
  16. GRB 041006 Optical afterglow observations
  17. GRB 041006: BR observations with VATT
  18. GRB 041006: Redshift confirmed
  19. GRB041006: Liverpool Telescope optical observations
  20. GRB 041006: Colour measurement
  21. GRB041006: break in the light curve
  22. GRB 041006: Radio Observations
  23. GRB 041006 : optical follow-up observation at Lulin Observatory
  24. GRB 041006 : Optical follow-up observation at TAROT
  25. GRB041006: Optical photometry and spectroscopy at TNG
  26. GRB 041006: presice astrometry
  27. GRB041006 (= H3570): Chandra Observations In Progress
  28. GRB 041006 : optical observation at Bisei
  29. GRB041006, optical I observation
  30. GRB041006 (=HETE3570): optical observations
  31. ROTSE-IIIa Observations of GRB 041006
  32. GRB041006, optical observation
  33. GRB041006, submillimetre observations
  34. GRB041006: MASTER optical observations
  35. GRB 041006: Optical decay
  36. GRB 041006 (=H3570): An X-Ray Rich GRB Localized in Real Time by HETE
  37. Konus-Wind observation of a series SGR 1806-20 bursts on 041005
  38. GRB041006: Fading of optical afterglow candidate
  39. GRB 041006 : Optical follow-up observation at KISO
  40. GRB 041006: Finding chart
  41. GRB 041006: Optical afterglow candidate
  42. Bursts from SGR 1806-20: Preliminary INTEGRAL results
  43. XRF 020903: Observations of the Host Galaxy (authors)
  44. XRF 020903: Observations of the Host Galaxy
  45. GRB 040924: Second Epoch WSRT Radio Observations
  46. radio observations, GRB 040924
  47. Konus-Wind and Helicon-Coronas-F observations of GRB040924
  48. GRB040924,optical observation
  49. GRB040924, RTT150 optical observation
  50. GRB040924,optical observation
  51. GRB 040924: detection of possible host galaxy by Subaru
  52. GRB040924, RTT150 optical observation
  53. GRB040924: KAIT observations
  54. GRB040924: Afterglow magnitude at t=17.5hr
  55. GRB 040924: WSRT Radio Observations
  56. GRB 040924: NIR finding chart
  57. GRB040924 : Optical candidate observations at Lulin observatory
  58. GRB040924 : Optical candidate observations at Lulin observatory
  59. GRB 040924: Subaru NIR observation
  60. GRB 040924: RTT150 optical observations
  61. GRB 040924, optical follow-up
  62. GRB040924: MASTER: OT decay
  63. IPN triangulation of GRB040924 (H3564)
  64. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  65. XRF 040912: Radio Observations
  66. XRF 040916: Radio Observations
  67. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  68. XRF040916: continuing decay of OT
  69. TAROT Observations of GRB 040916 (HETE #3558)
  70. GRB040912(=H3557): Candidate Optical Afterglow
  71. XRF040916, optical observations
  72. XRF040916: Optical Transient Candidate by Subaru
  73. XRF 040912, identification of CXO sources
  74. XRF040916, Ic observations
  75. XRF040916: optical follow-up observations
  76. XRF040912, BVRcIc field calibration
  77. XRF040916, BVRcIc field calibration
  78. GRB040916: Archival optical observations
  79. XRF 040916, optical follow-up
  80. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  81. GRB040916: Optical observations
  82. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  83. GRB040916 (= H3558): A Long XRF Localized by HETE
  84. GRB040912 (= H3557): Chandra Observations Scheduled
  85. GRB 040912, BVRI observations
  86. GRB040912 : Kiso Optical follow-up observation
  87. IBAS GRB Alerts 1978-1980
  88. Optical observations of field of GRB040912
  89. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  90. GRB040903 - A XRF?
  91. GRB040827: analysis of the XMM-Newton observation
  92. GRB040903, REM near-IR observation
  93. GRB 040903 - INTEGRAL data analysis
  94. Very bright burst detected from SGR 1806-20
  95. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  96. Possible GRB 040903 - further analysis
  97. GRB 040827 - Radio Observations
  98. XMM-Newton Images of GRB 040827
  99. GRB040825A: Optical observations
  100. GRB040825A: Optical observations

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