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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"

45547 results found.

  1. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  2. IPN triangulation of GRB040425 (=H3183)
  3. On Line Availability of Archival HETE Fregate Data and Lightcurves
  4. GRB040422: optical observations at Xinglong Observatory
  5. GRB040422: optical observations at CrAO
  6. GRB 040423 (=H3175): A Long GRB Localized by HETE
  7. GRB040422, optical observations at Loiano
  8. GRB040422 : I-band follow-up observation at Lulin Observatory
  9. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  10. GRB040422, BVRcIc field calibration
  11. GRB 040422,optical observation
  12. GRB040422: optical and NIR observations at the VLT
  13. GRB 040422: a long GRB detected with INTEGRAL
  14. GRB 040403, deep optical observations
  15. MASTER: HETE Alert 3163, 3167 technical optical observation
  16. INTEGRAL-SPI/ACS GRB data: timing correction
  17. IBAS GRB alerts 1739, 1740, 1741
  18. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  19. GRB 040403: Optical Observations
  20. GRB 040403 Optical Observations
  21. GRB 040403: Optical observations
  22. GRB 040403: optical observations
  23. GRB 040403: Optical Observations
  24. GRB 040403: a long GRB detected with INTEGRAL
  25. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  26. GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
  27. IBAS GRB Alert 1694
  28. GRB040323: NIR Observations and Variable Object
  29. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  30. GRB 040323, a dark GRB ?
  31. short hard GRB 040322
  32. GRB 040323: a long GRB detected with INTEGRAL
  33. IBAS GRB alerts 1679, 1680, 1681
  34. GRB040223: Deep NIR NTT data re-analysis
  35. GRB 040223: XMM-Newton results
  36. GRB040223, improved XMM position
  37. IBAS Alert 1678: not a GRB
  38. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  39. GRB 031203, possible supernova
  40. MASTER: RXTE GRB040308 optical observation
  41. IBAS results on a burst from SGR1806-20
  42. INTEGRAL detection of activity from SGR1806-20
  43. RXTE GRB040229 optical observation: no candidate
  44. GRB 040228 Optical observations
  45. IPN triangulation of GRB040228 (H3066, H3067)
  46. GRB040228 : KISO optical follow-up observation
  47. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  48. GRB 040223: Deep NIR NTT observations
  49. GRB 040223 : Optical observation (non-detection)
  50. XMM-Newton Images of GRB 040223
  51. GRB 040223, VLA observations
  52. GRB 040223: REM IJK Observations
  53. GRB 040223 XMM-Newton observation ...
  54. GRB 031203 XMM-Newton observation
  55. GRB 040223 : Planned XMM-Newton observation
  56. GRB 040106 : Planned XMM-Newton observation
  57. GRB 040223: further offline analysis
  58. GRB 040223: a long GRB detected with INTEGRAL
  59. GRB031111, optical observations
  60. GRB031220: 2nd Chandra observation and X-ray afterglow candidate
  61. GRB031203: Chandra Observations
  62. GRB040106, follow-up radio observations
  63. GRB040106: refined X-ray transient position
  64. Follow-up on IBAS GRB Alert 1379
  65. IBAS GRB alert 1379
  66. SN 2003dh/GRB030329 late-time optical spectroscopy
  67. GRB040106, Radio Observations
  68. GRB040106, likely optical afterglow
  69. GRB040106: Second Epoch Optical Observations
  70. GRB 031220: Optical observations of Chandra X-ray sources
  71. XMM-Newton Images of GRB 040106
  72. GRB040106: optical observations with REM+ROSS
  73. GRB031220: observation at Univercity of Miyazaki
  74. GRB 040106: Optical observations
  75. XMM-Newton observation of GRB040106
  76. GRB 040106 : Planned XMM-Newton observation
  77. GRB 040106 : peak flux
  78. GRB 040106 : a long GRB detected with INTEGRAL
  79. IPN triangulation of an intermediate burst from SGR1806-20
  80. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  81. GRB031220(=H2976): Observation with the Chandra X-ray Observatory
  82. GRB031225a triangulation (annulus)
  83. IPN triangulation of GRB031219 (large error box)
  84. GRB031220: Palomar Observations
  85. GRB 031220 : Kyoto Optical Observation
  86. GRB 031220: Subaru observation
  87. GRB 031220: Optical observation at Tokyo Tech
  88. GRB031220: ROTSE-IIIb Optical Limits
  89. GRB031220 : Optical Observation of Lulin Observatory
  90. GRB 031203 I-band monitoring
  91. IPN triangulation of GRB031214 (short/hard; very intense; small error box)
  92. GRB 2974 follow-up observations
  93. GRB031203, improved XMM position
  94. GRB 031203: Discovery of a dust echo
  95. GRB031214 triangulation (annulus), [repost of GCN2487, subject corrected]
  96. GRB030921 triangulation (annulus)
  97. GRB 031203: SMARTS optical monitoring
  98. GRB 021203: A Normal GRB viewed far off axis?
  99. XMM-Newton Observations of GRB031203: Preliminary Images
  100. GRB 031203: Variable Radio Source

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