ASTROSAT CZTI

Data Quality Report

Orbit 20171129_A04_167T04_9000001734_level2

Creation date: 2025-11-18T19:39:30.086467
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/AS1A04_167T04_9000001734cztM0_level2.fits modeM0/AS1A04_167T04_9000001734cztM0_level2_quad_clean.evt
Size (bytes)247,596,480281,617,920
Size236.1 MB 268.6 MB
Events in quadrant A1,480,0361,742,422
Events in quadrant B1,408,7501,672,274
Events in quadrant C1,490,7201,732,390
Events in quadrant D1,267,7861,531,786

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0612150
B0713730
C0554710
D0810550

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05460
B05460
C05460
D05460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A269088883.300134%
B2690716766.228862%
C269053681.367776%
D2690812214.537684%

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 28065 26911 0 0 0.00% 0.00%
B 28065 26860 0 0 0.00% 0.00%
C 28065 26910 0 0 0.00% 0.00%
D 28065 26907 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 1440 10.97 386 361 98.4
A 7 110 1211 8.64 386 361 98.4
A 0 30 1148 8.0 386 361 98.4
B 2 9 1209 11.27 372 353 75.9
B 5 225 959 7.98 372 353 75.9
B 3 17 919 7.45 372 353 75.9
C 12 241 1023 6.36 394 367 103.1
C 3 158 997 6.11 394 367 103.1
C 2 191 982 5.97 394 367 103.1
D 6 231 949 6.22 361 327 100.0
D 7 3 925 5.98 361 327 100.0
D 3 14 922 5.95 361 327 100.0

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