ASTROSAT CZTI

Data Quality Report

Orbit 57845

Creation date: 2026-06-07T07:10:16.540902
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/AS1A14_125T11_9000006582_57845cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57845cztM0_level2_quad_clean.evt
Size (bytes)514,877,76084,801,600
Size491.0 MB 80.9 MB
Events in quadrant A2,673,223576,899
Events in quadrant B3,819,526604,037
Events in quadrant C8,798,509448,681
Events in quadrant D3,276,071496,049

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0129152
B0159922
C0305742
D0142393

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6327190.300300%
B63273705.847953%
C6327158024.972341%
D6326250.395194%

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 7766 6602 2 2 0.03% 0.03%
B 7766 6602 229 229 2.95% 3.47%
C 7766 6602 1313 1313 16.91% 19.89%
D 7765 6601 15 15 0.19% 0.23%

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 5 168 19251 112.91 673 655 164.7
A 3 245 18389 107.68 673 655 164.7
A 3 14 13639 78.84 673 655 164.7
B 5 185 1081396 7801.15 657 632 138.5
B 2 249 28220 199.14 657 632 138.5
B 10 247 22230 155.9 657 632 138.5
C 9 38 5391560 33188.2 596 589 162.4
C 15 224 827730 5092.09 596 589 162.4
C 12 252 117642 720.61 596 589 162.4
D 12 110 464149 2568.53 647 619 180.5
D 8 160 56863 311.66 647 619 180.5
D 5 173 41455 226.28 647 619 180.5

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