ASTROSAT CZTI

Data Quality Report

Orbit 20180328_T02_020T01_9000001990_level2

Creation date: 2025-11-20T08:17:14.222416
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_020T01_9000001990cztM0_level2.fits modeM0/AS1T02_020T01_9000001990cztM0_level2_quad_clean.evt
Size (bytes)603,616,320533,963,520
Size575.7 MB 509.2 MB
Events in quadrant A3,726,6003,122,761
Events in quadrant B3,558,4283,307,032
Events in quadrant C3,624,1022,905,113
Events in quadrant D3,153,5142,617,947

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01291980
B01494490
C01309110
D01369260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012500
B012500
C012500
D012500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A615027221.173946%
B6150217252.804787%
C615025330.866638%
D615028021.304023%

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 72003 61493 0 0 0.00% 0.00%
B 72003 61455 0 0 0.00% 0.00%
C 72003 61493 0 0 0.00% 0.00%
D 72003 61489 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 3549 10.98 969 909 240.5
A 7 110 3129 9.23 969 909 240.5
A 9 19 2814 7.92 969 909 240.5
B 2 9 3008 11.47 939 897 184.1
B 3 17 2447 8.42 939 897 184.1
B 14 254 2307 7.66 939 897 184.1
C 12 241 2553 6.68 957 893 248.3
C 3 126 2415 6.13 957 893 248.3
C 9 242 2382 6.0 957 893 248.3
D 6 231 2306 6.24 898 819 238.4
D 3 14 2298 6.2 898 819 238.4
D 7 3 2250 6.0 898 819 238.4

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