ASTROSAT CZTI

Data Quality Report

Orbit 36986

Creation date: 2024-06-27T21:33:54.047021
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A11_079T01_9000005254_36986cztM0_level2.evt modeM0/AS1A11_079T01_9000005254_36986cztM0_level2_quad_clean.evt
Size (bytes)1,425,021,120268,286,400
Size1.3 GB 255.9 MB
Events in quadrant A8,964,7381,778,869
Events in quadrant B13,747,1191,701,979
Events in quadrant C9,411,8361,795,744
Events in quadrant D9,900,4701,690,809

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03420
B03420
C03420
D03420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0368415
B0519734
C0379084
D0404304

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16808390.232032%
B1680814838.823179%
C168081220.725845%
D168084352.588053%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 25059 16812 11 11 0.04% 0.07%
B 25059 16812 1017 1017 4.06% 6.05%
C 25059 16812 100 100 0.40% 0.59%
D 25059 16812 425 425 1.70% 2.53%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 10 83 560347 1397.13 2032 1998 399.6
A 15 222 403512 1004.69 2032 1998 399.6
A 9 143 96111 235.5 2032 1998 399.6
B 5 184 5167192 14135.24 1953 1901 365.4
B 0 221 277040 752.94 1953 1901 365.4
B 4 81 248174 673.95 1953 1901 365.4
C 15 214 710631 1540.22 2004 2024 460.1
C 0 10 338517 731.4 2004 2024 460.1
C 0 207 233422 502.97 2004 2024 460.1
D 2 250 790844 1663.99 1979 1936 474.1
D 12 6 606038 1274.19 1979 1936 474.1
D 12 17 448359 941.61 1979 1936 474.1

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter