ASTROSAT CZTI

Data Quality Report

Orbit 55739

Creation date: 2026-01-16T18:06:13.360389
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_099T04_9000006540_55739cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55739cztM0_level2_quad_clean.evt
Size (bytes)793,964,16076,086,720
Size757.2 MB 72.6 MB
Events in quadrant A10,137,208362,862
Events in quadrant B6,525,546491,502
Events in quadrant C4,494,672578,375
Events in quadrant D7,736,866424,203

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0345441
B0240521
C0176861
D0274151

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6400273642.750000%
B6400170726.671875%
C64011562.437119%
D6401162825.433526%

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 7110 6401 2096 2096 29.48% 32.74%
B 7110 6401 1339 1339 18.83% 20.92%
C 7111 6402 42 42 0.59% 0.66%
D 7111 6402 1310 1310 18.42% 20.46%

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 15 32 7219907 55548.48 527 513 130.0
A 12 115 431153 3313.49 527 513 130.0
A 8 249 163152 1251.4 527 513 130.0
B 4 206 4103793 31926.88 599 576 128.5
B 12 111 15707 117.73 599 576 128.5
B 11 111 14852 111.08 599 576 128.5
C 9 38 1250462 6850.16 663 657 182.4
C 14 96 336432 1840.38 663 657 182.4
C 13 3 193360 1056.2 663 657 182.4
D 11 129 5244906 32127.21 578 553 163.2
D 8 160 115968 707.04 578 553 163.2
D 5 173 38601 233.08 578 553 163.2

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