ASTROSAT CZTI

Data Quality Report

Orbit 20161217_A02_170T02_9000000892_level2

Creation date: 2025-11-08T15:36:43.411296
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/AS1A02_170T02_9000000892cztM0_level2.fits modeM0/AS1A02_170T02_9000000892cztM0_level2_quad_clean.evt
Size (bytes)309,389,760355,881,600
Size295.1 MB 339.4 MB
Events in quadrant A1,866,5282,238,162
Events in quadrant B1,782,4902,208,720
Events in quadrant C1,827,3322,117,057
Events in quadrant D1,505,1421,827,769

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07060
B07060
C07060
D07060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0710770
B0785270
C0729170
D01181210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A347256711.932325%
B3472513103.772498%
C347254391.264219%
D3472530518.786177%

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 38190 34724 0 0 0.00% 0.00%
B 38190 34706 0 0 0.00% 0.00%
C 38190 34725 0 0 0.00% 0.00%
D 38190 34722 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 14 188 1843 11.32 483 452 122.8
A 0 29 1835 11.26 483 452 122.8
A 14 204 1597 9.32 483 452 122.8
B 2 9 1567 11.48 471 449 97.4
B 12 226 1297 8.71 471 449 97.4
B 5 128 1250 8.23 471 449 97.4
C 12 241 1329 6.95 483 447 126.9
C 2 191 1250 6.33 483 447 126.9
C 9 188 1225 6.13 483 447 126.9
D 3 14 1186 6.87 429 390 115.9
D 11 82 1140 6.47 429 390 115.9
D 6 231 1119 6.29 429 390 115.9

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