ASTROSAT CZTI

Data Quality Report

Orbit 20151217_G04_007T02_9000000220_level2

Creation date: 2025-10-25T14:01:40.957797
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/AS1G04_007T02_9000000220cztM0_level2.fits modeM0/AS1G04_007T02_9000000220cztM0_level2_quad_clean.evt
Size (bytes)1,537,156,8002,378,410,560
Size1.4 GB 2.2 GB
Events in quadrant A9,015,09016,036,749
Events in quadrant B8,841,08415,833,785
Events in quadrant C8,741,74414,955,520
Events in quadrant D6,924,42812,205,961

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02250

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08143070
B08555900
C08063310
D09871600

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039080
B039080
C039080
D039080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1897679680.510099%
B18976722201.169856%
C1897674710.248199%
D1897662952815.560216%

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 225607 190684 0 0 0.00% 0.00%
B 225605 190594 0 0 0.00% 0.00%
C 225605 190611 0 0 0.00% 0.00%
D 225607 189689 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 8266 11.29 2336 2182 538.9
A 7 110 8210 11.19 2336 2182 538.9
A 14 188 6789 8.55 2336 2182 538.9
B 2 9 7133 11.6 2345 2234 422.4
B 5 128 6065 9.07 2345 2234 422.4
B 14 254 5992 8.9 2345 2234 422.4
C 12 241 6100 7.1 2307 2133 558.6
C 9 242 5823 6.6 2307 2133 558.6
C 2 191 5692 6.37 2307 2133 558.6
D 11 82 5011 6.88 1976 1813 464.6
D 3 30 4954 6.76 1976 1813 464.6
D 6 44 4916 6.68 1976 1813 464.6

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