ASTROSAT CZTI

Data Quality Report

Orbit 20171015_G08_071T02_9000001620_level2

Creation date: 2025-11-17T20:13:33.614545
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/AS1G08_071T02_9000001620cztM0_level2.fits modeM0/AS1G08_071T02_9000001620cztM0_level2_quad_clean.evt
Size (bytes)2,737,235,5202,517,719,040
Size2.5 GB 2.3 GB
Events in quadrant A16,424,76414,432,716
Events in quadrant B16,100,80014,557,637
Events in quadrant C16,544,56614,427,078
Events in quadrant D13,555,69612,580,672

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060180
B060200
C060240
D060210

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04550
B04550
C04550
D04550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07771550
B07353190
C06088820
D08809540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A295640153675.197876%
B295676133354.510004%
C29569129050.982445%
D295657256208.665447%

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 351125 295456 0 0 0.00% 0.00%
B 351125 295534 0 0 0.00% 0.00%
C 351125 295747 0 0 0.00% 0.00%
D 351125 294630 0 0 0.00% 0.00%

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 0 29 15866 11.11 4281 3995 1068.1
A 7 110 13512 8.91 4281 3995 1068.1
A 0 30 12106 7.59 4281 3995 1068.1
B 2 9 13885 11.8 4248 4030 835.2
B 3 17 10853 8.17 4248 4030 835.2
B 2 8 10613 7.88 4248 4030 835.2
C 1 80 12142 7.11 4371 4039 1139.2
C 1 81 11799 6.81 4371 4039 1139.2
C 12 241 11760 6.78 4371 4039 1139.2
D 6 231 10176 6.37 3870 3498 1047.8
D 3 14 10103 6.3 3870 3498 1047.8
D 7 5 9645 5.87 3870 3498 1047.8

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