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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"

45888 results found.

  1. GRB030921 triangulation (annulus)
  2. GRB 031203: SMARTS optical monitoring
  3. GRB 021203: A Normal GRB viewed far off axis?
  4. XMM-Newton Observations of GRB031203: Preliminary Images
  5. GRB 031203: Variable Radio Source
  6. GRB 031203: Magellan spectrum of possible GRB host
  7. GRB 031203: Optical/IR Astrometry
  8. IPN/HETE localization of GRB031203B (=H2949; large error box)
  9. GRB031203 K prime photometry: correction to galaxy coordinates
  10. GRB031203: ROSAT upper limits suggest XMM-S1 source as the transient
  11. XMM-Newton Observation of GRB031203
  12. GRB 031203: Deep NIR NTT & VLT observations
  13. GRB031203: K' Photometry of the likely GRB host
  14. XMM-Newton Observation of GRB031203
  15. GRB 031203: Radio detection
  16. GRB 031203: Further reports on December 4 observations
  17. GRB 031203: IR NTTobservations do not confirm REM detection
  18. GRB031203 : Optical Observation of Lulin Observatory
  19. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  20. GRB 031203: Apparent Spectral Break
  21. GRB031203: Planned XMM-Newton observation II
  22. GRB 031203: IR REM Observations
  23. GRB031203: Optical Observations
  24. GRB 031203 XMM-Newton observation
  25. GRB 031203: Optical/IR SMARTS Observations
  26. GRB031203: Planned XMM-Newton observation
  27. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  28. GRB 031203: further analysis of INTEGRAL data
  29. GRB 031203: A long GRB detected with INTEGRAL
  30. IPN triangulation of GRB031201 (large error box)
  31. IPN triangulation of GRB031130 (large error box)
  32. GRB031111A, prompt optical observations
  33. GRB 030329: Planned XMM-Newton Observation
  34. IPN triangulation of GRB031120 (two large error boxes)
  35. GRB 031111B (= H2925) : Kyoto Optical Observation
  36. IPN/HETE localization of GRB031109 (=H2917; large error box)
  37. IPN detection of activity from SGR1806-20
  38. GRB 031111, Radio observations
  39. IPN triangulation of GRB031114 (large error box)
  40. IPN triangulation of GRB031107 (two large error boxes)
  41. GRB 031111: Optical observations
  42. GRB 031111, optical observations
  43. SN 2003jd (SN/GRB?) -- X-ray Observations
  44. HETE Prompt GRB Spectral Analyses
  45. IPN triangulation of GRB031111 (=H2924): small error box
  46. XRF031109 (=H2919): A very long XRF localized by HETE
  47. IPN triangulation of GRB031108 (large error box)
  48. GRB031026: 1.2mm upper limit with MAMBO at the IRAM 30m
  49. GRB030929/SN2003jd association unlikely based on IPN localiztion
  50. IPN triangulation of GRB031027 (small error box)
  51. IPN triangulation of GRB031026B (large error box)
  52. Lulin optical follow-up observations of GRB031026
  53. SN 2003jd (SN/GRB?), Radio Observations
  54. SN 2003jd (SN/GRB?) - possible association with GRB 030929
  55. GRB 031026: Further Ic Observations
  56. GRB 031026 (=H2882): Evidence for High Redshift from Prompt
  57. Peculiar Type Ic SN 2003jd (SN/GRB?), optical spectrum
  58. IPN triangulation of GRB031024 (single error box)
  59. GRB031026 (=H2882): A Long, Hard Spectrum Burst Localized by HETE
  60. GRB 031026: Ic Observations
  61. GRB031026 : KISO optical follow-up observation
  62. IPN triangulation of GRB031024 (annulus)
  63. IPN triangulation of GRB031020 (large error box)
  64. GRB030329: radio observations at RT-22 (CrAO)
  65. IPN triangulation of GRB031016 (two large error boxes)
  66. IBAS alert 1180 refers to a burst from SGR 1806-20
  67. HETE Prompt GRB Light Curves and Color-Color Diagrams
  68. IPN triangulation of GRB031014 (annulus)
  69. Ongoing Bursting Activity from SGR 1806-20 detected with IBAS
  70. XRF 030824: additional observations at CFHT
  71. SGR1806-20 bursts on 031008. Helicon detection and small error box.
  72. IPN triangulation of GRB031008 (annulus)
  73. SGR 1806-20 bursts with INTEGRAL and IBAS announcement on Soft Gamma-Ray Repeaters
  74. IPN detection of continued activity from SGR1806-20
  75. IPN triangulation of GRB031007 (two large error boxes)
  76. XRF 030723: Subaru Optical Observations
  77. IPN triangulation of GRB031004B (annulus)
  78. IPN triangulation of GRB031004A (short/hard; annulus)
  79. IPN triangulation of GRB030929 (short/hard; annulus)
  80. A burst from SGR 1806-20 detected with IBAS
  81. XRF 030824: Early follow-up observation at Kiso observatory
  82. XRF 030824: observations at CFHT
  83. IPN triangulation of GRB030926 (short/hard; large error box)
  84. IPN triangulation of GRB030922B (large error box)
  85. XRF 030723: Detection of the likely host galaxy
  86. XRF030824 (=H2821): An X-Ray Flash Localized by the HETE WXM
  87. XRF030823 (=H2818): An X-Ray Flash Localized by the HETE WXM and SXC
  88. IPN triangulation of GRB030922A (large error box)
  89. IPN triangulation of GRB030921 (large error box)
  90. IPN triangulation of GRB030919 (large error box)
  91. GRB030922 triangulation (annulus)
  92. GRB030913: Subaru Optical Observations
  93. GRB 030913: ROTSE-3c Optical Observations
  94. GRB030913: OT's limit by MASTER
  95. GRB030921 triangulation (annulus)
  96. GRB030913, candidate afterglow observations
  97. GRB 030913, optical candidate
  98. GRB030913: AAVSO optical observations
  99. GRB 030913, BOOTES observations
  100. GRB030913 (=H2849): Confirmation of the Flight Localization

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