ASTROSAT CZTI

Data Quality Report

Orbit 20170611_A02_178T01_9000001286_level2

Creation date: 2025-11-14T10:44:35.072940
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_178T01_9000001286cztM0_level2.fits modeM0/AS1A02_178T01_9000001286cztM0_level2_quad_clean.evt
Size (bytes)643,351,680633,723,840
Size613.5 MB 604.4 MB
Events in quadrant A3,778,4173,702,006
Events in quadrant B3,757,3043,766,072
Events in quadrant C3,835,2133,586,661
Events in quadrant D3,306,7783,336,063

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014740
B014800
C014860
D014720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0940
C0910
D0930

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01880330
B01522110
C01436350
D01536640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6930025683.705628%
B6994614322.047294%
C701219551.361932%
D6986316672.386099%

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 98696 71429 0 0 0.00% 0.00%
B 98697 71889 0 0 0.00% 0.00%
C 98695 71967 0 0 0.00% 0.00%
D 98696 71652 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 3686 11.0 984 915 252.0
A 7 110 3120 8.75 984 915 252.0
A 0 30 2965 8.14 984 915 252.0
B 2 9 3269 11.58 992 942 200.9
B 14 254 2583 8.17 992 942 200.9
B 5 225 2485 7.68 992 942 200.9
C 1 80 2812 7.03 1012 932 267.6
C 12 241 2697 6.6 1012 932 267.6
C 1 81 2660 6.46 1012 932 267.6
D 6 231 2419 6.07 943 852 258.3
D 7 5 2378 5.91 943 852 258.3
D 1 19 2344 5.78 943 852 258.3

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