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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"

37684 results found.

  1. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  2. IBAS GRB Alert number 1774: NOT a real GRB
  3. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  4. IBAS Alerts 1771 and 1772: NOT a real GRB
  5. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  6. IPN triangulation of GRB040425 (=H3183)
  7. GRB040422: optical observations at CrAO
  8. GRB 040423 (=H3175): A Long GRB Localized by HETE
  9. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  10. GRB040422, BVRcIc field calibration
  11. GRB 040422,optical observation
  12. GRB 040422: a long GRB detected with INTEGRAL
  13. GRB 040403, deep optical observations
  14. INTEGRAL-SPI/ACS GRB data: timing correction
  15. IBAS GRB alerts 1739, 1740, 1741
  16. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  17. GRB 040403: Optical Observations
  18. GRB 040403 Optical Observations
  19. GRB 040403: Optical observations
  20. GRB 040403: optical observations
  21. GRB 040403: Optical Observations
  22. GRB 040403: a long GRB detected with INTEGRAL
  23. GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
  24. IBAS GRB Alert 1694
  25. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  26. GRB 040323, a dark GRB ?
  27. short hard GRB 040322
  28. GRB 040323: a long GRB detected with INTEGRAL
  29. IBAS GRB alerts 1679, 1680, 1681
  30. GRB040223: Deep NIR NTT data re-analysis
  31. GRB 040223: XMM-Newton results
  32. GRB040223, improved XMM position
  33. IBAS Alert 1678: not a GRB
  34. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  35. GRB 031203, possible supernova
  36. GRB 040228 Optical observations
  37. IPN triangulation of GRB040228 (H3066, H3067)
  38. GRB040228 : KISO optical follow-up observation
  39. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  40. GRB 040223: Deep NIR NTT observations
  41. GRB 040223 : Optical observation (non-detection)
  42. XMM-Newton Images of GRB 040223
  43. GRB 040223, VLA observations
  44. GRB 040223: REM IJK Observations
  45. GRB 040223 XMM-Newton observation ...
  46. GRB 031203 XMM-Newton observation
  47. GRB 040223 : Planned XMM-Newton observation
  48. GRB 040106 : Planned XMM-Newton observation
  49. GRB 040223: further offline analysis
  50. GRB 040223: a long GRB detected with INTEGRAL
  51. Follow-up on IBAS GRB Alert 1379
  52. IBAS GRB alert 1379
  53. SN 2003dh/GRB030329 late-time optical spectroscopy
  54. GRB040106, likely optical afterglow
  55. GRB040106: Second Epoch Optical Observations
  56. GRB 031220: Optical observations of Chandra X-ray sources
  57. XMM-Newton Images of GRB 040106
  58. GRB040106: optical observations with REM+ROSS
  59. GRB031220: observation at Univercity of Miyazaki
  60. GRB 040106: Optical observations
  61. GRB 040106 : Planned XMM-Newton observation
  62. GRB 040106 : peak flux
  63. GRB 040106 : a long GRB detected with INTEGRAL
  64. IPN triangulation of an intermediate burst from SGR1806-20
  65. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  66. GRB031225a triangulation (annulus)
  67. IPN triangulation of GRB031219 (large error box)
  68. GRB031220: Palomar Observations
  69. GRB 031220 : Kyoto Optical Observation
  70. GRB 031220: Subaru observation
  71. GRB 031220: Optical observation at Tokyo Tech
  72. GRB031220 : Optical Observation of Lulin Observatory
  73. GRB 031203 I-band monitoring
  74. IPN triangulation of GRB031214 (short/hard; very intense; small error box)
  75. GRB 2974 follow-up observations
  76. GRB 031203: Discovery of a dust echo
  77. GRB031214 triangulation (annulus), [repost of GCN2487, subject corrected]
  78. GRB030921 triangulation (annulus)
  79. GRB 031203: SMARTS optical monitoring
  80. GRB 021203: A Normal GRB viewed far off axis?
  81. GRB 031203: Variable Radio Source
  82. GRB 031203: Magellan spectrum of possible GRB host
  83. GRB 031203: Optical/IR Astrometry
  84. IPN/HETE localization of GRB031203B (=H2949; large error box)
  85. GRB031203: ROSAT upper limits suggest XMM-S1 source as the transient
  86. GRB 031203: Deep NIR NTT & VLT observations
  87. GRB031203: K' Photometry of the likely GRB host
  88. GRB 031203: Radio detection
  89. GRB 031203: Further reports on December 4 observations
  90. GRB 031203: IR NTTobservations do not confirm REM detection
  91. GRB031203 : Optical Observation of Lulin Observatory
  92. GRB 031203: z ~ 10 or Fragmented Dust in the Circumburst Environment?
  93. GRB 031203: Apparent Spectral Break
  94. GRB 031203: IR REM Observations
  95. GRB031203: Optical Observations
  96. GRB 031203 XMM-Newton observation
  97. GRB 031203: Optical/IR SMARTS Observations
  98. IPN triangulation of GRB031127A and B (quasi-simultaneous; large error boxes)
  99. GRB 031203: further analysis of INTEGRAL data
  100. GRB 031203: A long GRB detected with INTEGRAL

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