ASTROSAT CZTI

Data Quality Report

Orbit 20180429_A04_122T01_9000002064_level2

Creation date: 2025-11-22T02:49:15.979567
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_122T01_9000002064cztM0_level2.fits modeM0/AS1A04_122T01_9000002064cztM0_level2_quad_clean.evt
Size (bytes)969,007,6801,018,566,720
Size924.1 MB 971.4 MB
Events in quadrant A5,932,8666,272,565
Events in quadrant B5,781,3386,709,465
Events in quadrant C5,803,8545,794,994
Events in quadrant D4,871,9145,118,289

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020580
B020580
C020580
D020580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02153570
B02183630
C02134160
D02890270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10146017091.684408%
B10146118841.856871%
C10146110891.073319%
D10146155915.510492%

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 114576 101455 0 0 0.00% 0.00%
B 114576 101457 0 0 0.00% 0.00%
C 114575 101460 0 0 0.00% 0.00%
D 114576 101417 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 6062 12.02 1540 1441 384.5
A 0 29 5893 11.58 1540 1441 384.5
A 14 204 5016 9.3 1540 1441 384.5
B 2 9 4953 11.71 1525 1456 298.5
B 14 254 3834 7.97 1525 1456 298.5
B 3 17 3815 7.9 1525 1456 298.5
C 12 241 4086 6.65 1534 1424 400.2
C 7 111 3928 6.26 1534 1424 400.2
C 2 191 3897 6.18 1534 1424 400.2
D 6 231 3588 6.22 1389 1256 375.2
D 3 14 3508 6.0 1389 1256 375.2
D 7 5 3410 5.74 1389 1256 375.2

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