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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"

45519 results found.

  1. XRF 020903: Observations of the Host Galaxy (authors)
  2. XRF 020903: Observations of the Host Galaxy
  3. GRB 040924: Second Epoch WSRT Radio Observations
  4. radio observations, GRB 040924
  5. IBAS Alert 1991. Not a real GRB
  6. GRB040929,optical observation
  7. GRB040929: MASTER optical observations
  8. Konus-Wind and Helicon-Coronas-F observations of GRB040924
  9. GRB040924,optical observation
  10. GRB040924, RTT150 optical observation
  11. GRB040924,optical observation
  12. GRB 040924: detection of possible host galaxy by Subaru
  13. GRB040924, RTT150 optical observation
  14. GRB040924: KAIT observations
  15. GRB040924: Afterglow magnitude at t=17.5hr
  16. GRB 040924: WSRT Radio Observations
  17. GRB 040924: NIR finding chart
  18. GRB040924 : Optical candidate observations at Lulin observatory
  19. GRB040924 : Optical candidate observations at Lulin observatory
  20. GRB 040924: Subaru NIR observation
  21. GRB040924: Optical afterglow properties
  22. GRB 040924: RTT150 optical observations
  23. GRB 040924, optical follow-up
  24. GRB040924: MASTER: OT decay
  25. GRB040924: MASTER Optical observations
  26. IPN triangulation of GRB040924 (H3564)
  27. GRB 040924(=H3564): A Short, Bright GRB Localized in Real Time by HETE
  28. GRB040924 (H3564): Optical afterglow candidate
  29. XRF 040912: Radio Observations
  30. XRF 040916: Radio Observations
  31. GRB040912(=H3557): Chandra Candidate X-ray Afterglow
  32. XRF040916: continuing decay of OT
  33. TAROT Observations of GRB 040916 (HETE #3558)
  34. GRB040912(=H3557): Candidate Optical Afterglow
  35. XRF040916, optical observations
  36. XRF040916: Optical Transient Candidate by Subaru
  37. GRB040916 optical limits 17 min after GRB
  38. XRF 040912, identification of CXO sources
  39. XRF 040912 (=H3557): Spectral and Temporal Properties
  40. XRF040916, Ic observations
  41. XRF040916: optical follow-up observations
  42. XRF040912, BVRcIc field calibration
  43. XRF040916, BVRcIc field calibration
  44. GRB040916: Archival optical observations
  45. XRF 040916, optical follow-up
  46. GRB040912(=H3557): Observations with the Chandra X-ray Observatory
  47. GRB040916: Optical observations
  48. ROTSE-IIIb Observations of GRB 040916 (HETE #3558)
  49. GRB040916 (= H3558): Improved Localization from HETE WXM
  50. GRB040916 (= H3558): A Long XRF Localized by HETE
  51. GRB040912 (= H3557): Chandra Observations Scheduled
  52. GRB 040912: Optical Observations
  53. GRB/XRF040912,optical observations
  54. GRB 040912, BVRI observations
  55. Optical observations of GRB/XRF 040912 = HETE 3557
  56. An intense burst from SGR1806-20
  57. GRB040912 : Kiso Optical follow-up observation
  58. IBAS GRB Alerts 1978-1980
  59. Optical observations of field of GRB040912
  60. HETE 3557: Optical observations
  61. GRB040912 (= H3557): A Long GRB or XRF Localized by HETE
  62. GRB 040827: XMM-Newton data
  63. GRB040903 - A XRF?
  64. GRB040827: analysis of the XMM-Newton observation
  65. GRB040903, REM near-IR observation
  66. GRB 040903 - INTEGRAL data analysis
  67. IBAS Alert 1974. Not a real GRB
  68. Very bright burst detected from SGR 1806-20
  69. ROTSE-III Rapid Response to possible GRB 040903 (INTEGRAL #1972)
  70. Possible GRB 040903 - further analysis
  71. Possible GRB 040903 detected with INTEGRAL
  72. GRB 040827 - Radio Observations
  73. XMM-Newton Images of GRB 040827
  74. GRB040825A: Optical observations
  75. GRB040825A: Optical observations
  76. GRB 040827: optical and NIR observations at the VLT
  77. GRB 040827: UKIRT - 2nd epoch K-band imaging
  78. GRB 040827: 2nd epoch of Magellan K-band imaging
  79. GRB 040827: K imaging - no evidence of variability
  80. GRB 040827: Detection of NIR afterglow
  81. GRB 040827: Possible detection of optical afterglow
  82. GRB 040827: RTT150 optical observations
  83. GRB040827 XMM-Newton observation
  84. GRB040825A: optical limit before GRB
  85. MASTER: GRB040827 possible OT
  86. GRB 040825B: Optical observations
  87. GRB040827 optical observations
  88. GRB 040827 : Planned XMM-Newton observation
  89. GRB 040827 - Refined position
  90. GRB 040827 - A long GRB detected by INTEGRAL
  91. GRB040825B, BVRcIc field photometry
  92. GRB040825A, BVRcIc field photometry
  93. GCN GRB OBSERBATION REPORT
  94. GRB 040825A,optical observations
  95. Increase of SGR 1806-20 activity
  96. GRB040825A: optical observations
  97. GRB040825B: optical observations
  98. GRB040825B (=H3510): An XRF Localized in Real Time by HETE
  99. GRB 040825A: Optical observations.
  100. MASTER: GRB040825a optical observation

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