ASTROSAT CZTI

Data Quality Report

Orbit 20180914_T02_091T01_9000002368_level2

Creation date: 2025-11-24T17:31:02.908932
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_091T01_9000002368cztM0_level2.fits modeM0/AS1T02_091T01_9000002368cztM0_level2_quad_clean.evt
Size (bytes)802,872,000819,936,000
Size765.7 MB 782.0 MB
Events in quadrant A4,914,9985,021,682
Events in quadrant B4,713,4965,011,655
Events in quadrant C4,848,3844,809,393
Events in quadrant D4,277,3204,429,358

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016480
B016480
C016480
D016480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01270
B01270
C01270
D01270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01713280
B01818840
C01733280
D01731420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A811309811.209170%
B8113016742.063355%
C8113013201.627018%
D811308161.005793%

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 93540 81098 0 0 0.00% 0.00%
B 93540 81103 0 0 0.00% 0.00%
C 93540 81115 0 0 0.00% 0.00%
D 93540 81104 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 4883 11.61 1281 1203 317.0
A 7 110 4020 8.89 1281 1203 317.0
A 0 30 3774 8.11 1281 1203 317.0
B 2 9 3756 10.49 1245 1186 245.1
B 2 8 3206 8.24 1245 1186 245.1
B 3 17 3121 7.9 1245 1186 245.1
C 2 191 3377 6.6 1282 1198 330.4
C 3 126 3287 6.32 1282 1198 330.4
C 12 241 3280 6.3 1282 1198 330.4
D 3 14 3031 5.94 1220 1111 323.0
D 6 231 2988 5.81 1220 1111 323.0
D 10 189 2968 5.75 1220 1111 323.0

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