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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"

38428 results found.

  1. GRB 040825: Optical observations
  2. XRF040812: possible afterglow second Chandra observation
  3. GRB 040812: Second epoch CXO Observations
  4. GRB040823,optical observation
  5. XRF040812: GMRT observations
  6. Triangulation of GRB 040816 (Konus-Wind - Helicon-Coronas-F)
  7. XRF 040812: optical observation at VLT
  8. GRB 040812: Optical counterparts of CXO sources
  9. XRF040812: possible afterglow
  10. CXO observation of GRB 040812
  11. IPN/HETE localizations of GRB040810 (=H3489)
  12. GRB 040812: Keck and LCO optical observations
  13. GRB 040812: Keck and LCO observations
  14. GRB 040812: radio observations
  15. GRB040812, optical/IR observations
  16. Konus-Wind observation of GRB040810 (=H3489)
  17. GRB 040812: a long GRB detected by INTEGRAL
  18. XRF040701: Optical Observations at ESO
  19. IPN/HETE triangulation of GRB040802 (=H3485)
  20. GRB 040730, infrared observations
  21. GRB 040730: Optical observations
  22. GRB 040730: a long GRB detected with INTEGRAL
  23. Ongoing activity of SGR 1806-20
  24. GRB040624: optical monitoring at TNG
  25. XRF 040701 - optical observations of the decaying Chandra source
  26. XRF040701: Second-Epoch Chandra Observations
  27. Cancellation of IBAS/INTEGRAL GRB alerts
  28. XRF040701: VLA Observations
  29. XRF040701: Magellan Spectroscopy of Chandra Source #2 Associated Galaxy
  30. XRF040701: First-Epoch Chandra Observations
  31. IBAS Alert 1836: NOT a real GRB
  32. GRB040709 J,H-band observations
  33. GRB040624, optical observations
  34. GRB040706:observation at University of Miyazaki
  35. XRF 040701, optical observations
  36. XRF040701 (=U11548): a bright XRF detected by HETE
  37. Optical Observations of GRB040624
  38. GRB 040624: optical observations at TNG and VLT
  39. MASTER: GRB 040624 optical observation after 0,48d
  40. GRB 040624: R-band observations
  41. GRB 040624, optical observations
  42. GRB 040624 - A long GRB detected with INTEGRAL
  43. GRB 030329: Rebrightening of hyperluminal ejecta.
  44. IPN Summary of SGR1806-20 Activity in 2004
  45. GRB040511: Retraction of redshift identification
  46. SGR 1806-20: no IR variability of the proposed counterparts
  47. MASTER:HETE Alert 3259 (SRG1806-20) optical observation
  48. SGR 1806-20, potential NIR counterpart
  49. GRB 040606: Optical observations
  50. Activivty of SGR 1806-20
  51. IPN triangulation of an intense intermediate burst from SGR1806-20
  52. GRB 040511, very fast decay?
  53. GRB 030324: Detection and Color of Host Galaxy
  54. GRB 040511: NIR observations with REM
  55. GRB040511: Redshift identifcation
  56. GRB040511: Candidate optical/NIR afterglow
  57. IBAS GRB Alerts n.1785 to 1791
  58. GRB 040511: ROTSE-III Rapid Optical Upper Limits
  59. GRB 040511: Second Epoch Optical Observations
  60. IBAS GRB Alerts 1781-4
  61. GRB 040511: Optical observations
  62. GRB 040511: Optical Observations
  63. GRB040511: Optical Observations
  64. GRB040511: Optical Observations
  65. GRB040511 (=H3218): A Long GRB Localized by HETE WXM and SXC
  66. IBAS GRB Alert number 1774: NOT a real GRB
  67. Type Ic SN2001em (off-axis GRB jet?), optical spectrum
  68. IBAS Alerts 1771 and 1772: NOT a real GRB
  69. GRB and XRF on April 27, 2004. Detection by Konus-Wind and Helicon (Coronas-F)
  70. IPN triangulation of GRB040425 (=H3183)
  71. On Line Availability of Archival HETE Fregate Data and Lightcurves
  72. GRB 040423 (=H3175): A Long GRB Localized by HETE
  73. GRB040422, optical observations at Loiano
  74. GRB 040422: ROTSE-IIIb Prompt Optical Limits
  75. GRB040422, BVRcIc field calibration
  76. GRB 040422,optical observation
  77. GRB040422: optical and NIR observations at the VLT
  78. GRB 040422: a long GRB detected with INTEGRAL
  79. GRB 040403, deep optical observations
  80. INTEGRAL-SPI/ACS GRB data: timing correction
  81. IBAS GRB alerts 1739, 1740, 1741
  82. HETE/IPN localization of GRB040403A (=H3143, a long burst) and GRB040403B(=H3144, a short/hard burst)
  83. GRB 040403 Optical Observations
  84. GRB 040403: Optical observations
  85. GRB 040403: Optical Observations
  86. GRB 040403: a long GRB detected with INTEGRAL
  87. Summary of recent bursts from SGR 1806-20 detected by INTEGRAL
  88. GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
  89. IBAS GRB Alert 1694
  90. GRB040323: NIR Observations and Variable Object
  91. GRB 040319 (=H3128): An X-Ray-Rich GRB Localized by the HETE-2 WXM and SXC
  92. GRB 040323, a dark GRB ?
  93. short hard GRB 040322
  94. GRB 040323: a long GRB detected with INTEGRAL
  95. IBAS GRB alerts 1679, 1680, 1681
  96. GRB040223: Deep NIR NTT data re-analysis
  97. GRB040223, improved XMM position
  98. IBAS Alert 1678: not a GRB
  99. GRB 031203: spectoscopic evidence for a 1998bw-like SN
  100. GRB 031203, possible supernova

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