ASTROSAT CZTI

Data Quality Report

Orbit 51875

Creation date: 2025-05-02T10:17:31.385726
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/AS1C09_011T05_9000006466_51875cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51875cztM0_level2_quad_clean.evt
Size (bytes)686,606,40082,932,480
Size654.8 MB 79.1 MB
Events in quadrant A6,458,456562,240
Events in quadrant B7,187,656524,778
Events in quadrant C2,984,713574,256
Events in quadrant D8,295,230407,301

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0236551
B0256511
C0137441
D0291151

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63293715.861906%
B6330145823.033175%
C6330460.726698%
D6330170626.951027%

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 7044 6326 213 213 3.02% 3.37%
B 7045 6327 1139 1139 16.17% 18.00%
C 7045 6327 18 18 0.26% 0.28%
D 7045 6327 1605 1605 22.78% 25.37%

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 12 3 2284688 14262.07 646 630 160.1
A 4 175 589183 3675.03 646 630 160.1
A 4 253 266173 1658.1 646 630 160.1
B 4 170 3629998 28370.28 600 580 127.9
B 1 255 263848 2057.9 600 580 127.9
B 8 176 248657 1939.16 600 580 127.9
C 13 3 86282 489.14 635 629 175.1
C 15 231 75441 427.23 635 629 175.1
C 15 224 51813 292.3 635 629 175.1
D 11 129 4565420 29310.29 555 535 155.7
D 8 176 530291 3401.47 555 535 155.7
D 3 12 350274 2245.61 555 535 155.7

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