ASTROSAT CZTI

Data Quality Report

Orbit 52157

Creation date: 2025-05-20T14:06:17.864723
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_011T07_9000006470_52157cztM0_level2.fits modeM0/AS1C09_011T07_9000006470_52157cztM0_level2_quad_clean.evt
Size (bytes)1,069,951,68081,305,280
Size1020.4 MB 77.5 MB
Events in quadrant A5,881,195663,678
Events in quadrant B9,193,612560,040
Events in quadrant C7,734,070561,377
Events in quadrant D16,234,238168,479

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0227331
B0322991
C0281561
D0532381

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72922853.908393%
B7293219230.056218%
C7293137918.908542%
D7293557176.388318%

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 7352 7292 180 180 2.45% 2.47%
B 7353 7294 1597 1597 21.72% 21.89%
C 7353 7294 1167 1167 15.87% 16.00%
D 7352 7292 5381 5381 73.19% 73.79%

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 3 1359772 7091.87 772 753 191.6
A 3 231 481905 2510.83 772 753 191.6
A 3 114 154054 799.98 772 753 191.6
B 12 32 3216088 22388.59 685 661 143.6
B 10 254 1122046 7808.05 685 661 143.6
B 5 172 1016317 7071.88 685 661 143.6
C 15 224 2728356 13719.28 710 704 198.8
C 15 158 450753 2263.61 710 704 198.8
C 12 252 347922 1746.4 710 704 198.8
D 6 42 7781567 64290.87 416 396 121.0
D 12 17 3026411 25002.04 416 396 121.0
D 12 3 2014674 16642.7 416 396 121.0

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