ASTROSAT CZTI

Data Quality Report

Orbit 20170508_A02_132T01_9000001212_level2

Creation date: 2025-11-13T11:57:25.177341
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/AS1A02_132T01_9000001212cztM0_level2.fits modeM0/AS1A02_132T01_9000001212cztM0_level2_quad_clean.evt
Size (bytes)803,280,960785,165,760
Size766.1 MB 748.8 MB
Events in quadrant A4,847,4134,653,314
Events in quadrant B4,726,7604,758,485
Events in quadrant C4,867,6284,571,831
Events in quadrant D4,137,3864,049,180

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01773300
B01761580
C01737270
D02037300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01430
C01430
D01430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017000
B016960
C017000
D017020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8383313551.616309%
B8386112761.521565%
C838588070.962341%
D8379637384.460833%

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 98777 84236 0 0 0.00% 0.00%
B 98777 84225 0 0 0.00% 0.00%
C 98777 84234 0 0 0.00% 0.00%
D 98777 84142 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 4684 11.08 1257 1173 317.0
A 7 110 4037 9.04 1257 1173 317.0
A 0 30 3655 7.83 1257 1173 317.0
B 2 9 4100 11.7 1247 1184 249.3
B 3 17 3251 8.29 1247 1184 249.3
B 2 8 3157 7.91 1247 1184 249.3
C 1 80 3712 7.52 1283 1193 335.2
C 1 81 3695 7.47 1283 1193 335.2
C 12 241 3423 6.65 1283 1193 335.2
D 6 231 3029 6.23 1177 1069 314.4
D 3 14 2955 6.0 1177 1069 314.4
D 1 19 2936 5.94 1177 1069 314.4

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