ASTROSAT CZTI

Data Quality Report

Orbit 20180129_A04_174T01_9000001876_level2

Creation date: 2025-11-19T07:14:58.486504
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/AS1A04_174T01_9000001876cztM0_level2.fits modeM0/AS1A04_174T01_9000001876cztM0_level2_quad_clean.evt
Size (bytes)3,577,731,8403,634,387,200
Size3.3 GB 3.4 GB
Events in quadrant A22,120,44022,850,232
Events in quadrant B19,701,13419,541,399
Events in quadrant C21,690,98821,894,946
Events in quadrant D18,761,31819,733,202

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06290
B06290
C06290
D06290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08172580
B011369680
C08008870
D09314800

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A077460
B077460
C077460
D077460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A38047860191.581957%
B3804784659412.246175%
C38047835660.937242%
D380478127913.361824%

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 443119 380402 0 0 0.00% 0.00%
B 443119 374500 0 0 0.00% 0.00%
C 443119 380432 0 0 0.00% 0.00%
D 443119 380223 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 14 188 23480 12.73 5749 5381 1421.4
A 0 29 21941 11.65 5749 5381 1421.4
A 14 204 19157 9.69 5749 5381 1421.4
B 2 9 17226 11.91 5198 4951 1030.8
B 3 17 13363 8.16 5198 4951 1030.8
B 12 226 13118 7.92 5198 4951 1030.8
C 12 241 15111 6.55 5732 5323 1494.1
C 2 191 14655 6.25 5732 5323 1494.1
C 3 126 14578 6.19 5732 5323 1494.1
D 6 231 13693 6.18 5345 4856 1429.2
D 3 14 13538 6.07 5345 4856 1429.2
D 6 38 13162 5.81 5345 4856 1429.2

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