ASTROSAT CZTI

Data Quality Report

Orbit 20180702_T02_055T01_9000002206_level2

Creation date: 2025-11-23T06:41:44.304827
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_055T01_9000002206cztM0_level2.fits modeM0/AS1T02_055T01_9000002206cztM0_level2_quad_clean.evt
Size (bytes)664,237,440662,031,360
Size633.5 MB 631.4 MB
Events in quadrant A4,103,7984,084,629
Events in quadrant B3,788,3283,823,561
Events in quadrant C3,947,0943,766,129
Events in quadrant D3,467,3723,567,444

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01454290
B01967480
C01436430
D01576710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014300
B014300
C014300
D014300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A701146330.902815%
B7011449437.049947%
C701144920.701714%
D7011415072.149357%

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 81709 70113 0 0 0.00% 0.00%
B 81709 70027 0 0 0.00% 0.00%
C 81709 70114 0 0 0.00% 0.00%
D 81709 70097 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 4038 11.4 1068 1004 266.2
A 7 110 3230 8.36 1068 1004 266.2
A 9 19 3143 8.04 1068 1004 266.2
B 2 9 3240 11.82 1001 958 193.0
B 14 254 2481 7.89 1001 958 193.0
B 5 128 2463 7.8 1001 958 193.0
C 12 241 2851 6.99 1044 973 268.8
C 2 191 2632 6.17 1044 973 268.8
C 7 111 2616 6.11 1044 973 268.8
D 3 14 2504 5.98 989 899 268.5
D 6 231 2489 5.92 989 899 268.5
D 6 67 2400 5.59 989 899 268.5

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