ASTROSAT CZTI

Data Quality Report

Orbit 01436

Creation date: 2026-03-07T11:35:49.590048
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/AS1G02_034T01_9000000240_01436cztM0_level2.fits modeM0/AS1G02_034T01_9000000240_01436cztM0_level2_quad_clean.evt
Size (bytes)236,563,20026,282,880
Size225.6 MB 25.1 MB
Events in quadrant A2,423,144170,083
Events in quadrant B2,316,381177,516
Events in quadrant C2,099,700171,676
Events in quadrant D1,790,447156,795

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A083542
B080261
C074141
D064841

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0320
B0320
C0320
D0320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1633402.449479%
B1633150.918555%
C163350.306185%
D163320.122474%

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 1633 1633 259 259 15.86% 15.86%
B 1633 1633 223 223 13.66% 13.66%
C 1633 1633 122 122 7.47% 7.47%
D 1633 1633 65 65 3.98% 3.98%

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 15 127 395633 3043.86 526 530 129.8
A 12 133 7662 54.94 526 530 129.8
A 11 79 2038 11.61 526 530 129.8
B 8 4 128162 948.23 567 572 134.6
B 6 53 16325 117.07 567 572 134.6
B 0 220 4948 32.52 567 572 134.6
C 15 241 62928 430.84 512 531 144.8
C 3 143 27015 182.87 512 531 144.8
C 3 111 5792 36.33 512 531 144.8
D 9 53 7121 44.15 473 489 150.2
D 10 125 6260 38.42 473 489 150.2
D 9 65 5041 30.3 473 489 150.2

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