ASTROSAT CZTI

Data Quality Report

Orbit 20180928_T02_112T01_9000002390_level2

Creation date: 2025-11-24T21:50:10.612569
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/AS1T02_112T01_9000002390cztM0_level2.fits modeM0/AS1T02_112T01_9000002390cztM0_level2_quad_clean.evt
Size (bytes)2,268,457,9202,168,665,920
Size2.1 GB 2.0 GB
Events in quadrant A13,864,89012,740,292
Events in quadrant B13,263,76012,762,677
Events in quadrant C13,726,77812,747,522
Events in quadrant D12,099,49611,687,358

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A046860
B046860
C046860
D046860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03560
B03560
C03560
D03570

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05494610
B05584110
C05012820
D05295710

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A22980281043.526514%
B22980769803.037331%
C22980937871.647890%
D22980745471.978617%

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 267551 229641 0 0 0.00% 0.00%
B 267551 229743 0 0 0.00% 0.00%
C 267551 229812 0 0 0.00% 0.00%
D 267551 229757 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 13377 11.34 3620 3396 880.3
A 7 110 11018 8.66 3620 3396 880.3
A 0 30 10742 8.34 3620 3396 880.3
B 2 9 10842 11.14 3517 3368 671.0
B 2 8 9135 8.59 3517 3368 671.0
B 5 128 8711 7.96 3517 3368 671.0
C 12 241 9340 6.43 3630 3394 925.1
C 3 126 9297 6.38 3630 3394 925.1
C 2 191 8987 6.05 3630 3394 925.1
D 6 231 8997 6.43 3453 3148 909.9
D 3 14 8710 6.11 3453 3148 909.9
D 10 189 8708 6.11 3453 3148 909.9

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