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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"

26541 results found.

  1. GRB 031203: IR NTTobservations do not confirm REM detection
  2. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  3. GRB031203: Planned XMM-Newton observation II
  4. GRB 031203: IR REM Observations
  5. GRB031203: Optical Observations
  6. GRB 031203 XMM-Newton observation
  7. GRB031203: Planned XMM-Newton observation
  8. GRB 031203: further analysis of INTEGRAL data
  9. GRB 030329: Planned XMM-Newton Observation
  10. GRB 031111B (= H2925) : Kyoto Optical Observation
  11. IPN triangulation of GRB031114 (large error box)
  12. GRB 031111: Optical observations
  13. GRB 031111, optical observations
  14. SN 2003jd (SN/GRB?) -- X-ray Observations
  15. XRF031109 (=H2919): A very long XRF localized by HETE
  16. IPN triangulation of GRB031108 (large error box)
  17. GRB031026: 1.2mm upper limit with MAMBO at the IRAM 30m
  18. GRB030929/SN2003jd association unlikely based on IPN localiztion
  19. IPN triangulation of GRB031027 (small error box)
  20. Lulin optical follow-up observations of GRB031026
  21. IPN triangulation of GRB031024 (single error box)
  22. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  23. GRB031026 : KISO optical follow-up observation
  24. IPN triangulation of GRB031024 (annulus)
  25. IPN triangulation of GRB031020 (large error box)
  26. GRB030329: radio observations at RT-22 (CrAO)
  27. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  28. XRF 030824: additional observations at CFHT
  29. SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
  30. XRF 030723: Subaru Optical Observations
  31. A burst from SGR 1806-20 detected with IBAS
  32. XRF 030824: Early follow-up observation at Kiso observatory
  33. XRF 030824: observations at CFHT
  34. IPN triangulation of GRB030922B (large error box)
  35. XRF 030723: Detection of the likely host galaxy
  36. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  37. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  38. IPN triangulation of GRB030921 (large error box)
  39. IPN triangulation of GRB030919 (large error box)
  40. GRB030913: Subaru Optical Observations
  41. GRB 030913: ROTSE-3c Optical Observations
  42. GRB 030913, optical candidate
  43. GRB030913: AAVSO optical observations
  44. GRB 030913, BOOTES observations
  45. GRB030913 (=H2849): TAROT Observations
  46. GRB030913: wide field imaging (7 sq.deg) of the error box by MASTER
  47. GRB030913 (=H2849): A GRB Possibly Localized by HETE
  48. GRB 030913: Optical limit at RIKEN
  49. XRF030824: Optical observations
  50. IPN triangulation of GRB030903 (large error box)
  51. IBAS detection of bursts from SGR 1806-20
  52. IPN triangulation of GRB030827 (large error box)
  53. GRB 030823 observation at Ouda
  54. XRF030824: Second-epoch Palomar observations
  55. GRB030823: optical observations
  56. GRB030823: Palomar observations
  57. XRF030824: Palomar observations
  58. GRB030823: optical observation at Tokyo Tech
  59. RAPTOR observations of GRB030823
  60. Lulin follow-up observations of GRB030823
  61. GRB 030821(=H2814): A Faint, Long GRB Localized by the HETE WXM and the IPN
  62. 030813 SGR event (Konus-Wind observation)
  63. GRB 030817 = H2808 TAROT optical observations
  64. SGR 1808-20 (=H2802): A Possible new SGR
  65. GRB 021206 Optical Observations
  66. XRF030723(=H2777): Chandra Fading X-ray Afterglow Confirmed
  67. XRF030723, BVRcIc field photometry update
  68. IPN triangulation of GRB030801 (large error box)
  69. GRB021206 optical counterpart upper limit
  70. XRF030723: Re-analysis of ROTSE-III early images
  71. XRF030723 (=H2777): Second Epoch Magellan Observations
  72. GRB 030725: optical observations.
  73. IPN triangulation of GRB030726 (large error box)
  74. IPN triangulation of GRB030721 (large error box)
  75. XRF030723 Radio Observations
  76. XRF 030723: confirmation of fading optical counterpart
  77. XRF030723(=H2777): Chandra Observations
  78. GRB030723: Upper limits from historical observations
  79. XRF030723: Palomar observations and proposed counterpart
  80. GRB030725 (=H2779): A Bright GRB Localized by HETE
  81. XRF030723: optical observations
  82. XRF030723, BVRcIc field photometry correction
  83. XRF030723, ROTSE-III Early Observations
  84. XRF030723, BVRcIc field photometry
  85. XRF 030723, optical observations
  86. XRF 030723, optical observations
  87. XRF030723 (=H2777): An X-ray Flash Localized by the HETE WXM and
  88. Konus-Wind detection of the bursts from SGR1806-20 region
  89. SGR 1806-20, submm observations
  90. RXTE PCA Observations of SGR1806-20 Region
  91. IPN triangulation of GRB030714 (two large error boxes)
  92. IPN triangulation of GRB030715 (two large error boxes)
  93. GRBlog: Compilation of all GCN Circ. data
  94. GRB030706 triangulation (single large error box)
  95. GRB030329, optical observation in May
  96. IPN triangulation of GRB030626 (single large error box)
  97. IPN triangulation of GRB030626 (two large error boxes)
  98. GRB030329: second XMM-Newton observation
  99. GRB030418: R optical observations
  100. GRB030528(=H2724): X-ray Afterglow Identified in Second Epoch

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