ASTROSAT CZTI

Data Quality Report

Orbit 55498

Creation date: 2025-12-31T13:07:00.091733
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/AS1A14_099T01_9000006536_55498cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55498cztM0_level2_quad_clean.evt
Size (bytes)2,078,303,040234,463,680
Size1.9 GB 223.6 MB
Events in quadrant A14,230,5201,641,394
Events in quadrant B10,025,1331,862,668
Events in quadrant C13,635,0511,593,078
Events in quadrant D37,559,433678,318

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03880
B03880
C03880
D03880

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560053
B0441703
C0545383
D012471714

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1918913116.832039%
B191893491.818750%
C1919012456.487754%
D191881174061.184073%

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 20174 19192 1018 1018 5.05% 5.30%
B 20174 19192 150 150 0.74% 0.78%
C 20175 19193 1114 1114 5.52% 5.80%
D 20174 19191 10409 10409 51.60% 54.24%

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 4 159 3203029 6663.62 1946 1894 480.4
A 3 78 1281447 2663.57 1946 1894 480.4
A 0 8 779656 1619.02 1946 1894 480.4
B 5 172 1594265 3808.22 1983 1907 418.1
B 10 247 165466 391.16 1983 1907 418.1
B 7 252 136760 322.51 1983 1907 418.1
C 13 3 4546309 8627.71 1920 1901 526.7
C 15 147 437179 826.39 1920 1901 526.7
C 9 237 338089 638.26 1920 1901 526.7
D 7 70 25760098 68974.74 1308 1247 373.5
D 11 129 3517134 9414.53 1308 1247 373.5
D 2 153 1332456 3564.59 1308 1247 373.5

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