ASTROSAT CZTI

Data Quality Report

Orbit 52825

Creation date: 2025-07-15T19:15:14.693193
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/AS1C09_011T08_9000006482_52825cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52825cztM0_level2_quad_clean.evt
Size (bytes)3,146,754,240176,555,520
Size2.9 GB 168.4 MB
Events in quadrant A40,331,893471,146
Events in quadrant B41,542,110471,734
Events in quadrant C11,507,3481,664,534
Events in quadrant D21,598,7261,391,375

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01329213
B01366563
C0487753
D0777095

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A195311474375.485126%
B195321542678.978087%
C195326363.256195%
D19531329116.850136%

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 20600 19531 14537 14537 70.57% 74.43%
B 20601 19532 14297 14297 69.40% 73.20%
C 20601 19533 534 534 2.59% 2.73%
D 20600 19531 3233 3233 15.69% 16.55%

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 9 191 30898346 136358.63 908 885 226.6
A 3 62 4030319 17782.95 908 885 226.6
A 4 238 767483 3383.2 908 885 226.6
B 8 3 32329342 125903.27 1221 1176 256.8
B 12 32 2953474 11497.84 1221 1176 256.8
B 4 81 370864 1439.76 1221 1176 256.8
C 15 224 977899 1804.51 1967 1946 540.8
C 2 12 647267 1193.18 1967 1946 540.8
C 10 22 574839 1059.26 1967 1946 540.8
D 8 176 7284541 13769.27 1858 1779 528.9
D 10 172 2916082 5509.97 1858 1779 528.9
D 2 249 451007 849.34 1858 1779 528.9

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