ASTROSAT CZTI

Data Quality Report

Orbit 20170329_A02_178T01_9000001118_level2

Creation date: 2025-11-10T09:11:30.580538
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_9000001118cztM0_level2.fits modeM0/AS1A02_178T01_9000001118cztM0_level2_quad_clean.evt
Size (bytes)687,631,680703,863,360
Size655.8 MB 671.3 MB
Events in quadrant A3,772,9783,705,011
Events in quadrant B4,121,2084,448,967
Events in quadrant C4,199,6764,209,709
Events in quadrant D3,600,6123,828,961

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015260
B015260
C015260
D015260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02334760
B01582840
C01543790
D01675890

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A747261190015.924845%
B7473211211.500027%
C747327160.958090%
D7473016342.186538%

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 86186 74425 0 0 0.00% 0.00%
B 86186 74734 0 0 0.00% 0.00%
C 86186 74735 0 0 0.00% 0.00%
D 86186 74720 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 3672 11.19 977 912 246.7
A 14 188 3667 11.17 977 912 246.7
A 14 204 3242 9.45 977 912 246.7
B 2 9 3605 11.73 1087 1032 219.4
B 3 17 2814 8.12 1087 1032 219.4
B 12 226 2788 8.0 1087 1032 219.4
C 1 80 3040 6.91 1109 1029 291.2
C 1 81 2955 6.61 1109 1029 291.2
C 12 241 2861 6.29 1109 1029 291.2
D 6 231 2672 6.33 1027 933 274.8
D 3 14 2609 6.1 1027 933 274.8
D 7 5 2531 5.82 1027 933 274.8

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