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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

"N/A_MC170208_R1" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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').
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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"

10922 results found.

  1. GRB030115: R-band counterpart of IR candidate
  2. GRB 021211: R-band observations at late-time
  3. IPN triangulation of GRB030115B (small error box)
  4. GRB030115 (=H2533): A Long GRB Localized by the HETE WXM and SXC
  5. IPN triangulation of GRB030115B (annulus)
  6. GRB030115: R-band observations at Asiago
  7. IPN triangulation of GRB030101 (two large error boxes)
  8. Probable GRB in INTEGRAL SPI-ACS
  9. GRB021219, optical observations
  10. IPN triangulation of GRB021214 (annulus)
  11. GRB 021211, optical observations
  12. GRB 021211, optical observations
  13. GRB021211 - Upper limits from recent and historical observations
  14. GRB021211 (=H2493): A Bright, Long GRB Localized by HETE-2 in Near-Real Time
  15. HETE 2493: Optical observations
  16. IPN triangulation of GRB021201 (short/hard burst, small error box)
  17. GRB021125 refined position
  18. IPN triangulation of GRB021125B (two large error boxes)
  19. GRB021113, SPI ACS observation
  20. GRB021113: optical observations at Bisei
  21. GRB021112: Optical Observations
  22. IPN triangulation of GRB021113 (=H2449; annulus)
  23. GRB021113 (=H2449): A Long GRB Localized by HETE
  24. GRB021112 (=H2448): A Long GRB Localized by HETE
  25. IPN triangulation of GRB021104 (annulus)
  26. GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
  27. IPN triangulation of bursts from SGR1900+14, November 1-2, 2002
  28. GRB021104: Candidate present in DSS
  29. IPN triangulation of GRB021025 (portion of annulus)
  30. IPN triangulation of GRB021025 (annulus)
  31. IPN triangulation of GRB021023 (small error boc)
  32. IPN triangulation of GRB021020 (smaller error box)
  33. GRB021021(=XRF 021021): An X-ray Flash Localized by HETE
  34. IPN triangulation of GRB021020
  35. GRB 021004: VRI observations at TNG: possible break
  36. GRB021016(=H2397): A Long GRB Localized by HETE
  37. IPN triangulation of GRB021016 (small error box)
  38. IPN triangulation of GRB021014 (large error box)
  39. GRB021004: High-resolution optical spectroscopy
  40. GRB 021004: Optical/NIR Observations
  41. GRB 021004: Additional V-band Polarimetric Observations
  42. GRB021004: optical observation
  43. GRB 021004: WC wind?
  44. IPN triangulation of GRB021007 (annulus)
  45. XRF 020903 spectrum
  46. GRB021004: optical observations and predicted break time
  47. GRB021004: restart of optical decay
  48. GRB 021004: Optical Decay
  49. HETE fluences for GRB021004
  50. GRB 021004: V-band Polarimetric Observations
  51. GRB021004: Update Bisei photometric data
  52. GRB 021004: Optical Decay
  53. GRB021004, Optical Observations
  54. GRB021004: Upper limits from recent and historical observations
  55. GRB021004(=H2380): Revised Localization with HETE Soft X-ray
  56. GRB021004(=H2380): A Long GRB Localized by HETE in Near-Real Time
  57. XRF020903: TNG and Asiago photometry
  58. XRF 020903: Correction to GCN 1560
  59. XRF 020903: VRI observations
  60. XRF 020903: Supernova
  61. Single IPN error box for GRB020904
  62. IPN triangulation of GRB020904
  63. GRB020903(=H2314): An X-Ray Flash Localized by HETE
  64. GRB020819(=H2275): Revised Localization with HETE Soft X-ray
  65. SGR1900+14 burst localized by HETE
  66. GRB020813: High-resolution optical spectroscopy
  67. Second epoch K band imaging of GRB 020819
  68. K band observation of GRB 020819
  69. GRB020819(=H2275): A Long Burst Localized by the HETE WXM and SXC
  70. IPN triangulation of GRB020819 (HETE 2275)
  71. GRB 020813: addendum to GCN 1498
  72. GRB020813: V-band decay slope
  73. Polarimetry of GRB020813: evidence for variability
  74. GRB020813: High-Resolution Optical Observations
  75. GRB020813(=H2262): Revised Localization with HETE SXC
  76. GRB020813, optical observations
  77. IPN error box for GRB020813
  78. IPN triangulation of GRB020813
  79. GRB020813(=H2262): A Long, Bright Burst Localized by HETE in Near-Real Time
  80. GRB020812(=H2257): A Long Burst Localized by HETE in Near-Real Time
  81. GRB020801: Imaging of Suggested OT Counterpart at the Magellan
  82. GRB020801: Candidate OT present in DSS
  83. HST Imaging of the Host of GRB 011121
  84. Further refinement to IPN error box for GRB020531
  85. GRB020625 (=H2081): A Long Burst Localized by HETE
  86. GRB/XRF 020427, detection of an underlying system with the VLT
  87. AXP 1E2259+586 optical observations
  88. Fading Optical Source in the Field of GRB020531
  89. GRB020405: polarimetric observations
  90. GRB 020531/Candidate Redshift
  91. GRB020531: Second epoch Chandra observations
  92. GRB020531 Optical Observations
  93. GRB020531: Observations with the Chandra X-ray Observatory
  94. GRB020531: Upper Limit for Detection of Two TAROT Sources
  95. Refined IPN error box for GRB020531
  96. GRB020531(=H2042): Optical Observations
  97. IPN triangulation of the short, hard GRB020531 (=H2042)
  98. GRB020531(=H2042): Optical Observations
  99. GRB020531(=H2042): A Short, Hard Burst Localized by HETE
  100. HETE Observations of GX354-0 (= MXB1728-34, so-called "Slow

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