ASTROSAT CZTI

Data Quality Report

Orbit 20171207_A04_049T01_9000001754_level2

Creation date: 2025-11-18T23:36:55.851788
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_049T01_9000001754cztM0_level2.fits modeM0/AS1A04_049T01_9000001754cztM0_level2_quad_clean.evt
Size (bytes)241,606,080168,935,040
Size230.4 MB 161.1 MB
Events in quadrant A1,462,160867,939
Events in quadrant B1,399,968861,311
Events in quadrant C1,449,028844,431
Events in quadrant D1,227,936763,338

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0552400
B0646100
C0528760
D0628390

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05280
B05280
C05280
D05280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A258383421.323632%
B2583811764.551436%
C258381710.661816%
D258389333.610961%

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 31153 25838 0 0 0.00% 0.00%
B 31153 25834 0 0 0.00% 0.00%
C 31152 25834 0 0 0.00% 0.00%
D 31153 25782 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 1374 10.62 380 357 95.8
A 7 110 1215 8.96 380 357 95.8
A 9 19 1083 7.58 380 357 95.8
B 2 9 1179 11.17 370 355 73.8
B 3 17 1004 8.79 370 355 73.8
B 12 226 909 7.51 370 355 73.8
C 12 241 1032 6.74 382 357 100.1
C 9 233 967 6.1 382 357 100.1
C 2 191 964 6.07 382 357 100.1
D 3 14 926 6.35 350 317 95.8
D 6 231 901 6.09 350 317 95.8
D 10 189 879 5.86 350 317 95.8

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