ASTROSAT CZTI

Data Quality Report

Orbit 20171209_G08_083T04_9000001760_level2

Creation date: 2025-11-19T01:00:17.681710
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/AS1G08_083T04_9000001760cztM0_level2.fits modeM0/AS1G08_083T04_9000001760cztM0_level2_quad_clean.evt
Size (bytes)274,469,760291,899,520
Size261.8 MB 278.4 MB
Events in quadrant A1,634,5061,763,778
Events in quadrant B1,552,9361,683,983
Events in quadrant C1,635,5421,730,153
Events in quadrant D1,397,8061,571,746

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06220
B06220
C06220
D06220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0689290
B0791480
C0622340
D0742880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A303998572.819172%
B3039915715.167933%
C303994221.388204%
D3039910013.292871%

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 33874 30399 0 0 0.00% 0.00%
B 33874 30393 0 0 0.00% 0.00%
C 33874 30399 0 0 0.00% 0.00%
D 33873 30395 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 14 188 1613 11.15 425 397 109.0
A 0 29 1576 10.81 425 397 109.0
A 14 204 1414 9.33 425 397 109.0
B 2 9 1402 12.1 410 389 83.7
B 3 17 1130 8.85 410 389 83.7
B 14 254 1070 8.13 410 389 83.7
C 1 80 1242 7.47 431 399 112.8
C 1 81 1233 7.39 431 399 112.8
C 2 191 1159 6.74 431 399 112.8
D 6 231 1018 6.08 398 361 108.0
D 4 160 1005 5.96 398 361 108.0
D 3 159 988 5.81 398 361 108.0

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