ASTROSAT CZTI

Data Quality Report

Orbit 55927

Creation date: 2026-01-30T22:12:24.267557
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_030T02_9000006544_55927cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55927cztM0_level2_quad_clean.evt
Size (bytes)529,361,28089,907,840
Size504.8 MB 85.7 MB
Events in quadrant A5,960,134554,330
Events in quadrant B2,826,080664,977
Events in quadrant C4,177,160578,019
Events in quadrant D6,129,027473,018

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0222252
B0134402
C0172409
D0227532

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A648065710.138889%
B6480360.555556%
C64792303.549931%
D6479101715.696867%

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 7605 6481 736 736 9.68% 11.36%
B 7605 6481 17 17 0.22% 0.26%
C 7603 6479 218 218 2.87% 3.36%
D 7604 6480 1032 1032 13.57% 15.93%

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 12 115 2247312 13967.55 649 632 160.9
A 4 207 939464 5836.69 649 632 160.9
A 7 64 114379 707.16 649 632 160.9
B 0 213 40044 279.39 666 642 141.0
B 0 171 39103 272.72 666 642 141.0
B 7 252 35407 246.51 666 642 141.0
C 13 3 967597 5359.83 650 644 180.4
C 12 252 539097 2984.65 650 644 180.4
C 15 199 90824 499.87 650 644 180.4
D 11 129 3080059 18365.92 591 565 167.7
D 6 31 307613 1831.22 591 565 167.7
D 7 129 124504 739.16 591 565 167.7

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