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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

37716 results found.

  1. Ongoing activity of SGR 1806-20
  2. GRB040624: optical monitoring at TNG
  3. Cancellation of IBAS/INTEGRAL GRB alerts
  4. IBAS Alert 1836: NOT a real GRB
  5. GRB040709 J,H-band observations
  6. GRB 040624: optical observations
  7. GRB 040624: optical observations at TNG and VLT
  8. MASTER: GRB 040624 optical observation after 0,48d
  9. GRB 040624: R-band observations
  10. GRB 040624, optical observations
  11. GRB 040624 - A long GRB detected with INTEGRAL
  12. GRB 030329: Rebrightening of hyperluminal ejecta.
  13. IPN Summary of SGR1806-20 Activity in 2004
  14. GRB040511: Retraction of redshift identification
  15. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  16. GRB 040606: Optical observations
  17. MASTER: HETE Alert 3274 optical observation
  18. Activivty of SGR 1806-20
  19. IPN triangulation of an intense intermediate burst from SGR1806-20
  20. GRB 040511, very fast decay?
  21. GRB 030324: Detection and Color of Host Galaxy
  22. GRB 040511: NIR observations with REM
  23. GRB040511: Redshift identifcation
  24. GRB 040511: Optical limit
  25. IBAS GRB Alerts n.1785 to 1791
  26. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  27. GRB 040511: Second Epoch Optical Observations
  28. IBAS GRB Alerts 1781-4
  29. GRB 040511: Optical observations
  30. GRB 040511: Optical Observations
  31. GRB040511: Optical Observations
  32. GRB040511: Optical Observations
  33. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  34. IBAS GRB Alert number 1774: NOT a real GRB
  35. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  36. IBAS Alerts 1771 and 1772: NOT a real GRB
  37. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  38. IPN triangulation of GRB040425 (=H3183)
  39. GRB040422: optical observations at CrAO
  40. GRB 040423 (=H3175): A Long GRB Localized by HETE
  41. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  42. GRB040422, BVRcIc field calibration
  43. GRB 040422,optical observation
  44. GRB 040422: a long GRB detected with INTEGRAL
  45. GRB 040403, deep optical observations
  46. INTEGRAL-SPI/ACS GRB data: timing correction
  47. IBAS GRB alerts 1739, 1740, 1741
  48. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  49. GRB 040403: Optical Observations
  50. GRB 040403 Optical Observations
  51. GRB 040403: Optical observations
  52. GRB 040403: optical observations
  53. GRB 040403: Optical Observations
  54. GRB 040403: a long GRB detected with INTEGRAL
  55. GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
  56. IBAS GRB Alert 1694
  57. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  58. GRB 040323, a dark GRB ?
  59. short hard GRB 040322
  60. GRB 040323: a long GRB detected with INTEGRAL
  61. IBAS GRB alerts 1679, 1680, 1681
  62. GRB040223: Deep NIR NTT data re-analysis
  63. GRB 040223: XMM-Newton results
  64. GRB040223, improved XMM position
  65. IBAS Alert 1678: not a GRB
  66. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  67. GRB 031203, possible supernova
  68. GRB 040228 Optical observations
  69. IPN triangulation of GRB040228 (H3066, H3067)
  70. GRB040228 : KISO optical follow-up observation
  71. GRB 040228 (=H3066?,=H3067?): A Long GRB Localized by the HETE-2 WXM
  72. GRB 040223: Deep NIR NTT observations
  73. GRB 040223 : Optical observation (non-detection)
  74. XMM-Newton Images of GRB 040223
  75. GRB 040223, VLA observations
  76. GRB 040223: REM IJK Observations
  77. GRB 040223 XMM-Newton observation ...
  78. GRB 031203 XMM-Newton observation
  79. GRB 040223 : Planned XMM-Newton observation
  80. GRB 040106 : Planned XMM-Newton observation
  81. GRB 040223: further offline analysis
  82. GRB 040223: a long GRB detected with INTEGRAL
  83. Follow-up on IBAS GRB Alert 1379
  84. IBAS GRB alert 1379
  85. SN 2003dh/GRB030329 late-time optical spectroscopy
  86. GRB040106, likely optical afterglow
  87. GRB040106: Second Epoch Optical Observations
  88. GRB 031220: Optical observations of Chandra X-ray sources
  89. XMM-Newton Images of GRB 040106
  90. GRB040106: optical observations with REM+ROSS
  91. GRB031220: observation at Univercity of Miyazaki
  92. GRB 040106: Optical observations
  93. GRB 040106 : Planned XMM-Newton observation
  94. GRB 040106 : peak flux
  95. GRB 040106 : a long GRB detected with INTEGRAL
  96. IPN triangulation of an intermediate burst from SGR1806-20
  97. GRB031220(=H2976): TNG R-band Observation of the Chandra X-ray Sources
  98. GRB031225a triangulation (annulus)
  99. IPN triangulation of GRB031219 (large error box)
  100. GRB031220: Palomar Observations

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